Open Source Ecology OSE Apprenticeship, 1 Oct 2021

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From YouTube: One of the Largest Fused Filament Fabrication 3D Printers in the World

Description

We are building one with a 3600 liter print volume. See the competitor audit at https://www.aniwaa.com/buyers-guide/3d-printers/largest-3d-printers/

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A

So, let's start recording.

B

Here, by the way.

A

And share sitting on it so sharing my screen.

A

So where do we go so? First of all, uh the firework that we built on here is work on a cnc torch table. We've done most of the one-inch universal access on a torch table, so you want to take a look at universal axis.

A

And now, of course, simplifying this.

A

To what we learned and faster build easier, build things like things like one thing like interior nuts, we're getting rid of like things like interior nut catchers, where nuts can spin inside make everything accessible, uh yeah, dark, dark and lovely. Can.

B

We keep the light up.

A

Light you want dark, okay, um so one inch universal axis prior work, so so same as the 5 16 inch, the eight millimeter stuff. The concept is the same: it's you've got bushings around rods and you've got the motor piece. The idler piece, the carriage the carriage, is, what moves those.

C

The green parts are the bearing.

A

Yep, those are 3d printed. So here is this is what we're going to be building an oversized so motor piece we've got.

A

The carriage and we've got the idler piece: either functions, only just to wrap the belt around and catch the rods and attach to the frame. So you can say, there's three functions: the carriage.

A

Provides the the precision motion around the rods it's where the belt is attached, it's where your tools are attached. So that's the part. That's moving! So once again, three functions more or less the motor piece you've got the drive there. You've got the attachment to axis and once again, you've got the spacing of the rods to be equal.

A

So in all this game like if we collaborate between the 3d printed parts and say the the carpented parts, carpentry parts of wood, only thing we have to keep in mind primarily is the rod spacing so that the parts inter-operate.

A

If we get that right, you can make wood parts, you can make plastic parts uh here, the the design initial design. It looks kind of hairy and complex, like look at all those parts um and we've simplified it way over that, like first, we start with clam shells and it's like all the bolts to put clamshells together. That's just a pain, so you've got say like the idler piece.

A

You know two clam shells: you got four bolts, four nuts 12 pieces or well nine pieces, 10 pieces right there well reduce that to one piece which is just one full: full shell.

A

So that's some of the initial learnings. We thought this would be cool because then you have more flexibility in terms of think taking things apart, but in practice I don't know that.

C

Wasn't take it apart, it fits together, yeah.

A

Like if you're on an axis you might as well, you don't really take off one part: you probably take off both parts if you're modifying something, so that wasn't highly useful, but the number of parts is remarkably small. That's all so concept is very simple. You got a motor, you got a rod. You've got some bolts, let's go through this, so we understand this how the system works, so we still have a motor. This is the small ones, but we're going to use larger ones. uh The ones we use are nema 26, nema 224.

A

If you look look online, you can see they're slightly bigger than what we use we're used to. They have flanges for the bolt holes and that's if, if we're gonna make that out of wood, all you need to do is have a hole for the shaft and the correct spacing for the bolt holes. Now, that's an industry standard.

A

So you, google, nema 24 volt pattern and you can find that bolt pattern.

A

I'll give you the specific dimensions, so you can you can do that. I mean pull it up anywhere off the internet.

A

um So that's the kind of motors we have the documentation right now we started just started the thing which is called large, 3d printer, so working back I'll paste this into the into the chat box for anyone who wants to get in there, because that is our editable dock.

A

And then make sure that's open editable you can find and edit.

A

um So yeah working doc, I mean we already- can did some of these new pieces already. This is this is old, for example, this is your. What is that? That's your carriage carriage ream it out from the middle faster print time. Do that v2 good, less print time, three hours, 25 minutes, uh 0.6, millimeter layer, height, 1.2 nozzles. So this is in the free cut.

D

I'm sorry what makes that uh you saw faster printing. I don't before you said something about the.

A

Key we have uh 1.2 millimeter nozzles as our standard that we print with, because we want to print larger things. Typically, the the hobby printers use 0.4 nozzles, so you get much faster print rates which are go as squared, so it should be. In theory, you you'd be printing out nine times as fast because of the four compared to 0.4 compared to 1.2 is three-fold factor and it's pi r, squared for the area that you're depositing at one time.

A

So it's nine times in principle faster, we're using still our regular heater block, we're not even going to a thing called the super volcano.

A

We have that, but let's get this to work first before we add any variables. The goal for now is get the large frame. Large axes working, including the lifting of hundreds of pounds on a bed talking about the bed, is going to be heavy.

A

If you're talking about a full print, you talk about a module, that's 200 pounds, that's what we do plus the bed weight. It might be another 100 pounds. How much can these motors do? They can do 50 pounds of pop. We have 200 pounds out of the box with four motors, so um that's a basic design. We start with.

C

Now we're gonna do a bed that size that's rigid and not 200 pounds in and of itself.

E

A

D

Some because to your point, the frame has got to be larger than the bed, so the.

A

But no, the bet is going to be four by four four.

D

Four feet by four feet: we.

A

Only have to go that that far we can we have. We can do that. How do you do a large bed like that? Let's talk about.

F

A

That's some weight, um but let's, let's, let's get to that in a sec I mean you can I mean so you you want to do uh reinforced flat plates, so steel plates will be quite warped, but you can make it more straight by welding on thin honeycomb structure. On the back, like, for example, on uh d3d genealogy, we did that where you reinforce it by welding a pattern across so anytime, you have a weld. That's at the right angle. You get it super straight if you clamp it down with a flat bar lengthwise.

A

If you look at the 18 inch bed printer like those, how do we do the bed inside the.

A

The 18 inch bed right here.

A

How do you do that bed.

A

Build pictures.

E

A

Bed pictures, so that's the bed here: let's, let's take a look at the bed, but what you do is uh well that's the large steel. But what we do is then weld this. That's how you reinforce it on the inside.

A

And therefore you can get a relatively lightweight structure now here we can use our halogen heaters. So that's an improvement. We use the filled it with foam and ran the nichrome heaters, which are much harder than the uh halogens. So we can do something like this.

A

This was only 18 inches. We have one. uh We have a plate, that's three by three feet. If we want to go, 4x4 we'd have to cut that out of the large sheet. We have.

C

um Just one question: not being pro welding or anything does one have to be careful of warpage or something well.

A

Here's the points, so what you do here is when you, when these are you hold down these bars, which are stock material, that's 2 by 1 16, lightweight stock that might even be like yeah, that's 1 16 when you hold it down really flat. That edge is quite straight like to within, like a millimeter or so so you'll have a millimeter flatness across the whole thing.

A

As long as you do that, like once you're connected cool just attack welds, do it like, if you just burned, burned a lot into this yeah I mean you start warping. All this is sheet steel, so you can turn down your voltage.

G

A

Yeah, you can turn it down, um but if you get that entire thing, hot it'll, I mean a little warp on you, so you want to just weld it. This style, where you just got dots, that's plenty strong for what we want to do.

B

The reason why the bed is so thick I mean is that for insulation going in there.

A

Yeah, the reason for that is to keep structural integrity and the second one is to insulate it so you're, using about 30 percent less power with an unheated chamber. So you took some data and that saves you about 30 percent energy on a heat bed which, if you're in production, that matters for numbers and cost of electricity.

A

If you're running a farm, that's got. You know a bunch of these and running 24 7.. um Now, what's up what are other ways to do it? uh How about tile, 4x4, tile or 2x2 tile super flat ceramic tile yeah like for flooring, yeah, that's a good idea! So we can put the heaters.

C

A

C

A

I could put it right on this yeah.

C

That's what I'm saying this is the substrate.

A

That would be a good idea.

C

H

A

Gonna use this.

H

We're gonna use the same frame so okay, so what kind of insulation is going to be able to take that extra heat.

A

uh Not insulation, you, you designed it so that the heat dissipates and you got a water water cooling. You have to have water cooling in that place, so we're gonna like this frame. It's gonna be our multi-purpose prototyping frame and we can use it for the subsequent cnc experiments like, for example, the mig head. We just replaced the head and put on a torch head with that.

A

If you want to do production like hour long prints, yeah you'd have to have water running on that, because your entire printer would have a meltdown after an hour or so of heating up it's you see how hot that stuff is. So that's the bed style.

A

A

We technique about large beds here those those individual squares are like nine inches. So if we do like every nine on center, that's pretty good stability. It's like having an eight by eight bed, somewhat like on the d3d pro the the printer other printer.

A

We have yeah like every eight inches to 12 inches, probably like less than 12, like eight eight to nine is about the right number, so it doesn't so you have complete stability like in terms of flatness and the way those are intersecting they're just notched out one into the other, so they intersect like that. You can grind them down like that. um That's the bet, but the design is like one of the main design considerations would be like how much you got to start thinking.

A

Okay, how are my motors going to do for lifting that bed? That I mean that's a challenge right um so.

C

That's why you have counterweights.

A

On this yeah like on that, we have counterweight, so we should do counterweight too. If we have, um if we have 200 pound lift capacity and our bed is under 100, we could do it, we could just test it without it and then maybe add those later, but we wouldn't be able to do our full prints on that. You'd have to add those counterweights later and it's a pretty simple mechanism. It's uh we would probably use like. What's it called?

A

uh What's like this tent wire, or what's it called the that strong wire paracord power cord works? Well, you want to have bearings around that too. So the power cord would would slide well, but one of the main limits, the design of bed weight.

A

So I mean each motor does 50 pounds.

A

Force you can calculate that from the torque of the motor and the diameter of the pulley. The pulley is still one half inch diameter so we're using the same as on the 3d printers, but that turns out to be 50 pounds with that with the motors we use. um So the kind.

C

Yeah I mean, is it pretty easy just to add in a few more in series.

E

C

A

Yeah, but that's so much it's easy, but it's all time right so in three days four is a good number. You can go higher, um but then it becomes like so much uh it gets kind of too much. At that point I mean four is perfectly workable.

A

Yeah with the with the universal controller, so universal controller for control with external stepper drivers, the little drivers are not going to do it, we're going to use external ones, universal controller.

A

What's that look like.

A

Just put a link on that, so you can study how that was done there. So anything with blue outline means a hyperlink, so you can click on that.

A

Then the hyperlink pops up universal controller. That's another page.

A

So we build up on this.

A

Universal axis here, so that's that's! A critical.

E

A

Let's, let's go over the the pieces and then we so we we are clear about how this thing works. So just studying the the simple universal axis does it. We know we have a motor. We have a pulley, we've done it, you guys have done it. You got a set screw and a pulley. That's it. I mean not much to it. It's larger, larger shank on the motor. It's now I think, eight millimeters.

A

So here it's like five. We go to eight the bearings. Now we get go into steel, uh brass, bronze, brass bushings. That's all mcmaster car.

A

So if you go to mcmaster, you can get the.

A

A

You would look for a one inch.

A

Bronze bushing.

A

You get stuff like this. These are.

A

Like yeah, there's all kinds of all kinds of types, all embedded, sleeve, bearings, they're kind of self-lubricated, that's what we get you get get them in all kinds of sizes and one inch is very common. So this kind of a thing. Well, let's get a specific link to this and it's and it's only what are we doing we're doing one and a half inches long? I believe.

A

No not not like that. You have different wall thicknesses. So what you want to search for here is inch and then for shaft diameter one and then you have different wall thickness, we're just using 1 8 wall thickness, so it's kind of thin one in shaft. So this one we use is one and a quarter od, and it's this one. I believe here, which is one and a half inches long.

A

So you go to product detail. It looks like that. It's the cat is here so it's 1.5 inches. So therefore the carriage has to be a minimum of three inches to hold these. As you put two.

A

No flange we've got a bunch of these and that's that's industrial grade. That's going to be very strong, it's metal, so that's the equivalent of the plastic eight millimeter! What's next! So this is the belt pegs of before now we have the belt clamp and the belt cylinders. We need to print new versions of that.

A

So that's printing! So you got your pulley this. Bearing for the belt we can use now is use the eight millimeter shaft, which is common, which we use elsewhere, like on the universal printer, use it as a shaft for a 3d printed uh pulley just for the idler, so you just gotta wrap it around so two bearings on outside shaft through it. So if you're doing your wood block, wood block two bearings shaft through 3d printed piece to spin on that.

A

No, we don't have the time in three days: we're gonna we're gonna, okay, let's not do it, we, okay, so the psychology here is: we got it's doable completely doable uh if you wanna, go more industrial grade and have have a print that will be more appropriate for the um say, the mid mig welder printer, which uh just the radiation, would probably melt down your parts after some, so you got to shield them so so metal would make a lot of sense, but like right now, three days is extreme.

A

We don't have time to mess with stuff, we'll be glad to uh finish everything right and we've got seven axes like eight feet. The rods are like you carried the rods. How heavy is one rod, two of those um one rod? Almost one rod is used for one z-axis, that's heavy right, heavy stuff. So let's not no room for, like anything outside of mission. Critical, we'll use a one-inch rod right, yeah one inch.

A

Now we also got hollow rod, so we it's a. We did get it from a mcmaster car hollow stuff, which is a one-inch od, and then it's 1 8 inch wall. So we can use that for the the x and y to make that part light for the z axis.

A

Those rods only come like up to 6 foot length, so we can't do z with it. I would like to do it because I mean these rods are getting heavy. I mean talking about uh nine feet. um Was it like over 100 pounds just for the rod I mean so so. The the constraint on the 3d printed parts is just strong enough, so you can uh hold the weight.

A

I mean it's literally the weight now you're going to have the heavy bed, but you have four of the z's and you you kind of need them, but that would be the heavy part what I would suggest. Actually we, when we build the structure, we can hang the the xy gantry at a comfortable height because actually like, if you hang it up above your head, that's actually not comfortable.

A

We should just start start it like at six feet, whatever we can mount it higher later, because the system will be completely remountable to a higher position, but just for a comfortable working height. uh Let's, like we'll, build a large frame, but let's work comfortably, so we don't have to like go up on ladders to actually mount the axes and stuff like that. Just for ergonomics and getting this thing done because you can easily hang it up later.

A

In fact, it would be good to prototype it at a comfortable level, so we can move it because I mean we'll be messing around and getting tired and stuff so um doing that, okay equivalent of the so you need four bolts for the motor. Now the motors are flanged in this case. If you go to to this, so it's not, um so you can go all the way through the bolt length doesn't matter, which is a good thing, so you can use any kind of bolt uh length like you.

A

Don't have to have a very precise bolt length enough in here in a universal axis. Those are very precise, length, they're, 25, millimeter bolts, because we're going right through the plastic and threading in so that's that, um then you've got three pieces, still the the motor motor piece, idler piece and carriage piece and a belt. The belt is wider. It's 15 millimeters now so, instead of eight, what is it? No, it's six. So six we've got 15 but other than that same concept. Just super sized.

A

um We did this, that's that's the kind of topology we got on a this is this is like not not good enough, like the rods banned enough that you can do this, but very marginally, so you don't get a good quality out of this. uh You can hardly lift like we could actually couldn't lift the bed properly like it started skipping with a smaller motors.

A

Now. Maybe if you want to do this and then use heavier rods, the thing that started bending on you was the actual x-axis. I mean four feet wide yeah. It just starts to bend which does work because of bed leveling that corrects it, the z, height bed levels. It corrects it for you, but you have to print like just you know. You won't get the high performance of going fast and stuff like that.

A

Okay, am I sharing I'm still sharing what locked up there.

A

Maybe stop sharing and start sharing again.

H

E

A

So in this configuration, this is what we're doing this super sized one-inch rods, so four z-axis motors on top um or bottom now, since I would actually maybe mount them on the bottom, because you got all the wiring to go up there, maybe just mount them right on the bottom, so you have shorter wiring.

A

The universal controller is the other part, but yeah think about this. We actually have that print surface there. We can reuse it. If we like. That's it's three by three: it's sizeable uh that would actually be a cool thing. I mean we can go to larger if we want, but I mean I'd, be happy with getting this to work.

D

To confirm when you were talking about the uh you know: weight, uh specifications or requirements um if the each of these molars is limited to 50 pounds, I don't know how much derives you know support, but does that mean that the part has to be limited to 50 pounds, or is there an additional weight distribution of some sort? Are you always limited to like with one axis and one motor.

A

So you got four of them, so you're limited to 200 pounds total lift ability, so you have to use counter weights we're going to use hollow rods for the so the z rods don't count because they're you're, not lifting the z rods at all. Okay, what counts is the y rods only and for that we have hollow rod which helps so that hollow rod may be, like I don't know, maybe like 30 pounds, 20 pounds, so we still have like.

A

If we do a lightweight bed like this, we can still get it to work without counterbalance very likely because 200 pounds, that's considerable, um that bed there it's it's about 45 pounds without the reinfor, the honeycomb on the back, but the honeycomb on the back could be light. That could be like five pounds or ten pounds um and we could put something lightweight like like a mesh on the bottom and that's full steel.

A

What we want to do is hold a little bit of insulation and the lamps, so we should use probably like four lamps, four to eight lamps. We could use eight even for two thousand. Eight is only uh two thousand watts. One thousand watts would be plenty to heat this up because they they actually work, really well they're, actually much more efficient than other means, because they are radiant as opposed to conductive heat transfer, which is faster and more effective. In this case, not to.

D

Derail too much, but in the future, if you didn't want to have a 3d, uh I'm sorry, a metal printing head. Is there a way to use you know higher wattage um or just multiple uh halogen lamps to uh to melt metal um as well.

A

No halogens go only to like what 400 what's metal metal is a thousand one hundred just to start.

C

A

Thought there was a well, it depends. What metal you have low temperature metals that melt at 200.

D

Or 300. all right, just I thought there was some like higher wattage and even halide lamps. I guess I could do like up to 2000, fahrenheit and stuff like that.

E

A

Don't know, oh that'll be news to me that might be the filament temperature, but the radiant energy temperature.

A

um I don't know, maybe it's true. The only way I know that you can do it is for melting metal is induction, not not photons, but electromagnetic radiation. I don't know, what's the limit of of a photon?

A

That's well, you are talking about laser lasers, yes, definitely metal, but I'm not sure how much a halogen gets but yeah. I can't look it up right now, because yeah that's inch. That would be interesting, but um I haven't heard of it. It doesn't mean it's not possible, but but uh thing you have to pay attention to is heat loss.

A

Maybe if you have a very well insulated um chamber, then you can do it, but then again, if the halogen goes to 2000, when does your glass melt in that yeah gonna melt, the glass before you melt, metal.

A

Glass tube, so what's the higher melting temperature.

D

A

G

How do you mount the halogens around the nozzle to melt the metal right.

E

A

No that's a different problem beyond the scope of this mundane pedestrian discussion here.

B

uh Getting back to the weight also, uh the printed part also is that a concern.

A

Oh yes, yeah a door module is going to be, or a wall module they're around 100 to 200 pounds. If you print a full stack of two by fours, you talk about a ton or something like that. If you four by four bed of two by fours, that's like ton, so yes, that will be a huge issue. You can do the full bed. You can only do a part of it or hollow shapes because the what's a cubic meter of plastic way.

A

What's the density of plastic, it's like one gram per per cubic centimeter and would.

C

Would one tend to print like completely solid or like a honeycomb? Oh.

A

Yeah structure.

C

In the plastic.

A

Yeah, that's the advantage of 3d printing. If we do the 2x4, do it honeycomb to save material while giving you the full the strength that you need? You can print it full for full strength, but with honeycomb structures. No, you don't! You might not need to. You. Can optimize for geometry for strength to to dimension ratios, so plastic is about a gram per cubic centimeter or in other words, a ton per cubic meter.

A

Oh we've got more than two cubic meters here. So that's four thousand pounds we could print on this bed we're talking serious stuff here, you're, not not going to be able to counterweight that unless you have an extremely precise counterweight system. Now you can't I mean the motors. Are you got 200 pounds in the motors you need to well what you can do is gear down, but then the belts you got to go beyond these belts. They're 50 pounds safe working strength chain, hey, have you got experience.

A

Oh yeah, look at that yeah, okay, so there we've got a small idea, so water tanks that get emptied and then yeah you could possibly design this extremely well. You can probably use these motors because you got 200 pounds of force. You only have to have enough to have a differential, of course, to counteract the friction of your your weight. So if you've got less than 200 pounds of friction in a system yeah you could you could do some kind of a counterbalance system, a more funky one.

A

Beyond the scope of this pedestrian discussion.

D

um I don't know if you, uh if you, google, a halogen, bulb heat output. If you get the same thing, I do it'll. uh It answers the question on the uh the bulb and the glass and the heat output.

E

D

Don't know if it's freezing again, but it's saying here.

A

The bulb yeah, this is the filament, so you have to talk about how that filament? What's the temperature once uh once the because the radiation is omnidirectional, so what is the actual temperature it's generating a certain distance away? It's not going to be that that high so that'll be that at the filament.

A

So if you could have a metal very close to that yeah, you could melt it. But how does it scale to you know if you've got bulbs, I mean you got to go into the metal too by conduction, I don't know, maybe there's some geometry where you can.

D

Interestingly, a metal uh metal will have to not melt to your point.

A

So yeah the bulb is only that, but that's not true, because the radiation from the metal will heat that bulb up. This is this is a particular wavelength going out of it once you start heating it with the radiating metal, probably melt that thing down. Okay, but let's move on so universal control is what we do. You don't have to worry about it from when we talk about tomorrow, but it's the same thing we've built.

A

uh All you're doing on the universal controller.

A

Is replacing the so it's still the same ramp system. Hacking it to um do this so you've got. This is what you've seen before now. Instead of you take off the little stepper drivers and put them connect them to these larger external stepper drivers, which are called tb.

A

There's these external stepper drivers.

A

It's internet speed, but external stepper drivers which, which you use instead using the same kind of control. We have to worry about it right now, uh we'll talk about it tomorrow and get to it a structure, structure and axis today. So so there's a lot there. So let's go through what we need uh between carpentry and and uh 3d printing. So this kind of thing we can, I think we can print, as is we have to expand. Well, we have to expand the bearing hull.

A

uh What I did do uh right now, just just before this so on. um We do have some cat here. So we have these parts and here's some more parts um for practical purposes. This is a template. So actually I drew this up real, quick just before so take a look at this. This is basically the spacing of if you make it out of wood. So basically, what I propose is um sorry. We get one team on um go ahead.

B

I just turned on the gas stove someone cooking, something it's very dry now.

A

Someone's cooking a pot.

C

Yeah, I don't know if it's milk, but it's just a crust left.

A

Okay, um that's that's the spacing for uh the bearings. So if you uh so the same, the center of this is also the spacing for sorry spacing for the well. We can read the dimension off of that. So let me just read that dimension. So the critical dimension that we have is I'm going at 3.5 inches right now, I'm actually forgetting about what we did before.

A

um Isn't that other window.

D

No, I think it. There was some server error and I had to make a choice of what to click, and I guess I clicked it off.

A

Ken, what what dimension do we do between so so, let's talk about logical dimensions that may make sense between the rods we have enough space for about 3.5 inches. So that's like that.

A

We're limited by the bed size of the six printers we have what kind.

C

Of wood stock, do you have around this.

A

I would use.

C

Because you gotta have a.

A

Four by six.

C

Yeah and you've got to have a pretty decent piece of wood for it to not split down the grain and stuff for doing this kind of.

A

Yeah so use a block for use a four by six and you can possibly do that. Yeah, some four by six cut, offs, yeah or whatever treated four by six stained treated, lumber, that'll be probably the best and you can cut it.

A

Yeah yeah, you gotta can't do it out of two buys really, um but this kind of makes sense. Now it's a little different than what we have in uh an official cab. By can.

A

So here's here's what we've got uh it's probably since we're reworking these files. It's probably the easiest.

A

Like, for example, this this is, uh can drew this up, we can readily pretty much just redo this, um because the spacing of the the size of the the hole is not great, and it's like some weird, like 89.7 millimeters.

A

Let me just try to keep it.

D

Okay, is it freezing again.

A

The main thing is we gotta, like we don't have this prototype, we're prototyping and doing this, so the simplest way to do it is to say: okay, here's an easy, understandable dimension like I would migrate off the current dimensions of 89 millimeters, because it's like it's going to be a pain to measure it. So we can modify this very slightly. It's pretty quick to take a block, poke two holes in it poke a square and that's like five minutes. We can redo that.

A

But one of the critical features of um the question is: what are the critical features of what we need to design here so that it's connectable to one another and there's an auto paralleling mechanism where it's best looking on this printer here, take a look at what we've got here to explain this, but we want to accommodate that so that anyone can build this without high tolerance again once again designed for tolerancing. So what we do here is, if you observe the bearings on the other side, it's called our auto parallel mechanism.

A

But what's what is this thing doing here? These two bearings so look at it study it tell me what it's doing.

A

Why do we have those two bearings there.

A

Those bearings allow the rods to slide in and out. The other side is fixed, those those rods are fixed there.

A

So what is going on there.

C

Fermented seizing up is exactly where I can like flex a little bit. Maybe.

A

So if we build a frame, we're not going to build a perfect frame down to a you know, a few thousands that you have like zero bind up, we're designing, counting you can be off by a quarter on the frame, not a problem, even a half inch one inch if we have the rod ability of the rod to move in and out as long as this is straight, we don't care what's happening on the other side, the motion is measured from the end stop, so you still have that, like it doesn't matter how far out we're there uh on this or if this or this side is not parallel to that.

A

uh Within a reason of binding up the actual paralleling mechanism here, because if you have it too far out you're not even going to be able to slide in and out of those but a half an inch quarter inch so, which means we can build the frame in a second, we can lay it up on a five by ten table.

A

Use use a five foot, um yeah angle, quarter by four angle. Put it back four by four angle: you can lay out on a table and uh do this little trick. The frame doesn't have to be perfect, so we want to design that in to our system.

A

So that's part of the design we have to do um that means well here it's an over slung carriage right. Okay, what we want to do is probably connect it.

A

We can do this kind of a system, but if we, if we have um well, let's look at the actual pieces to determine do you want to go like with the axis like this? What's convenient here is that the shooter is comfortable to be mounted on top. However, the extruder tip is not going to reach over the one inch carriage, so we have to under slang the carriage it has to be under mounted under the actual axis. So that's the other difference.

A

We have to make a little platform um just connect this to the underside of the carriage.

A

In this case, well,.

B

A

Go to the basic geometry here so so think about what we need, because we have to think about this, so we can do.

A

Yeah, so let's explain this: let's just spend a minute to explain how we are connecting x and y axes together and in fact we don't need to go into the now. How do you mount one to the next for x y? For today?

A

Let's worry about the zs and let's worry about the y's, we'll we'll solve how to mount the x, because the questions are. Do we go this way? Do we go this way because then we're going to have to put holes into our pieces accordingly? So the question is what holes like? What mounting points do we have available?

A

A

A

Well, if you want to look at my screen directly.

A

What I'm showing is we've got this 3.5 inch so right now you can go, get a block of wood and make an idler. We need six seven. So that's a job in itself.

C

The idler is the piece on the end.

A

With the little idler thing yeah, we can print the pulleys around that go around a uh the eight millimeter shaft so that the same shafts as on the print, the small printers. That's what we'll use for an axis and two skate bearings, which are what we use in the extruder same thing, uh so mount those, and do this now. The dimensions here are so critical dimensions, 3.5 for the centers and 5.5 to the outside, so we're just within the printing distance of the bed, which is 6.

A

so 5.5 gives us a little leeway in case. We can't reach six. Some printers may not reach six, um but 5.5 is good. This also allows us enough space on the outside that, if we want to mount something to the outside here like through both holes, so what I'm saying- and that is.

A

And let's not worry about the details, because we can spend all day discussing how to how to mount things to this, because uh you want the carriage pieces to be designed such that you can mount them this way or that way uh to each other through the motor piece and either piece. Otherwise, how do you? How do you do it? The axes already have that built in for the 516s like, um for example, if you go through through these two holes, you can attach well that piece or the actual holes on top.

A

You can take this piece at this angle, actually mount it through these two holes. So it's already designed for certain interconnection mechanisms. We have to design this in here, which is not designed, so we don't have to worry about it. Don't worry about it for today, because for the z-axes at least, uh I would say if we get to this man, if we could finish the z-axis and the frame today, that would be that'll, be a big milestone.

A

So, let's, let's perhaps talk only about that, then we worry about uh the y-axis, which is also independent. It does not need this consideration until the the mounting consideration until we get to the x-axis, but we know we have a provision here which is we have bolt holes, so um we can design little bolt holes on the ends here.

A

Like quarter inch bolt holes here so that if we want to now, we can interconnect the other piece through these bolt holes.

A

So draw a few of those in here.

A

And, what's that mean so if you close that, so what's that mean well if we expand that.

A

A

Okay, anyway, um in this picture- so I I did this so imagine this is longer. It's gonna be a little longer now. You can also imagine if this head holes at the top at exactly the same space, then you can connect one to the other. So that's the only provision we'll save right now, we're gonna say once we need to we'll put in those well for the wood pieces we can put those in later and for the 3d printed pieces.

A

uh We'll put them in too we'll see how much we can get printed, because we we have we're competing between making axes like cutting steel, cutting rods, uh welding and actually doing some 3d prints, but the first thing on the 3d prints. We wanted to do like a sample little test file like this, so we know that the bearing or the rod fits in exactly we have to fight it so that we're going to just get these sample prints started. I got an sd card on that, so we can do that.

G

um Is this also the part that you would suggest to make out of wood for now.

A

Well, we're doing out of wood because we we want to buy ourselves time.

G

Right now, I understand.

A

G

A

G

This part, because I mean it would help with the wood making sure everything's lined up if we did have one to use as a template.

A

No because uh I'm not sure how it helps, because uh you can control the size of the things you're drilling in 3d printing. What we're trying to make up for is the curve like the width of the filament thing. So when you print a one inch hole, it's not one inch, it might be 0.95 right, so we're testing what exactly we need to set to make it more seamless, as opposed to like using a heat gun for everything, um so that little bit of testing is useful.

A

You can also print like whatever print one and then just drill it out with a one inch bit.

A

But let's try to do try to like test test. A few prints make sure we're doing okay, so the od of the bearings. um I don't know if you can do that. I think we have some bits there that are 1.25. We have some forstner bits there might be like a 1.25. There's a hole saw, that's 1.25.

A

I don't know if we can do that with that, but um we know that we can do the idler and motor pieces because that's just one inch bits. We can definitely do that. So maybe start on that and for the motor. The thing that's critical is: what's what's the bolt pattern, so the bolt pattern yeah, that's really way way uh bought down there.

A

So I would go maybe to nema nema 24 motor on the wiki. You probably have.

E

A

Template nema 24. probably have a diagram of.

E

E

A

That's not see, so um we want to look for exact, spacing nema 24 bolt pattern I mean: do I need to pull it out.

E

C

What's that sorry.

A

Can you google this thing? It's it's a very specific dimension and it's like right: where did it go.

C

I mean if we have a.

A

There it is, it's.

C

An extension too, we can just like.

E

C

Just put the actual motor on and mark it.

A

Oh yeah yeah just use the motor as a template. That's that's the best, but you can also look it up right um motors templates. So so it's important to get the motor parts up motors out. There's the pulleys there's uh the belt and what and the rods once we have that we do it. So, let's, let's get into a cut list. So, um okay, so is this frame clear, so we're gonna use quarter by four by four we're gonna make it nine feet high, so we can actually reach eight feet of print we're gonna.

A

Do it five feet in fact six feet so we can easily get so here's another trick. I didn't mention about the heated bed. What happens with a heated bed? uh Let's explain the concept, just a quick concept to.

C

Print you're, talking about like printing lumber straight up.

E

C

Is that gonna not become wobbly over, I mean no.

A

The bed is not moving.

C

Another bed's not moving, but the head's moving on that. I don't know it's not going to be bonded enough, but I just would think once you're hitting that kind of height that there's some differential in that, and like I mean I just think of printing on the small yeah.

E

C

And printing those test blocks that are like that tall.

E

C

Mean piece of lumber: it's gonna start getting a little just that head pushing around on it. He's gonna be moving it. The.

A

Difference is that you've got a two thousand pound gorilla here. Instead of a forty pound gorilla.

C

E

C

I've worked with tracks a lot. I've worked with all sorts of plastic bummer, and it's not very. It's not like.

A

It's not still, but that's because they don't do honeycomb because they can't yeah. This is better yeah. It's.

C

And I'm just I'm just trying to name what potential.

A

Yeah, here's another thing: major floor yeah make little interconnects. You can do like little.

C

Bridges and then we get yeah.

A

Oh yeah and the real promise here is the lightweight uh honeycomb structures, they're, insulating and structural and stuff like that. So um but let's let's talk about why we have to have a six foot frame for a four foot bed and in fact, for a heated chamber you can only get like two feet out of it because you have a closure on top. So how does this mechanism work? It's a very simple system that I don't believe is patentable.

A

The way the guys do it. They have funky bellows that telescope bellows bellows shapes which keep the heat in ah cool, but that I think the patent actually ran out on that kind of technology. But it's also like when I look at it. That's not.

A

This is better like uh take a look at what we've got uh idea that is simpler, so high temperature heat enclosure. You have to picture this because we don't have cat on it. But okay, so it's your chamber, but what's the mechanism.

A

This is the only thing I can show you so that you can study here.

A

What's the deal here so to the underside of the carriage, all we have is a sheet something like pei or polycarbonate that blocks the top of the chamber. The chamber is completely open. On top all that sticks through the through the block is your nozzle and your cooling fan yeah. Look at this thing.

A

So the heated chamber, the only things that are in the heated chamber, are the bed and the z rods. Nothing else.

C

Extruders that plate is like mounted to the head.

A

Yeah, it's mounted right to the head and it slides over the top. That's all it's like the simplest way. You can do it, but that's problem.

C

Is you need, you need space yeah.

A

C

Gonna run into the yeah, the frame.

A

Yeah, so so, if you have six feet, you're gonna get two feet of print bed two by two.

A

So without a chamber you can get four by four.

A

But if we succeeded on this thing, this is extremely valuable. Nobody has done anything close to this.

A

uh Nobody makes an open source in the proprietary world. There's 250 000 printers that do this, but when we do this you're getting into the realm of absolutely multi, ten thousand dollar printers at the low low end to quarter million dollar printers at the at the regular end of industrial grade printers. But it's so ex.

B

Carriage is moving all the way to the right. Then this plate is also.

C

So your frame has to be massive.

F

If you really want.

C

To do a four by four or.

A

If you wanted four by four, you have to have a twelve by twelve frame on top using.

D

This technique, like.

F

A

This is the dumb way to do it, but it's so robust and foolproof. All you need is structure and you can get structure much more easily than like mechanical bellows and stuff like that, which is more complex.

C

A

C

That's more of a reflective sheet because it's not actually like the walls are going to be enclosed right.

A

C

um But you're still going to have like heat gap around the side or like air gap around.

A

Yeah put a gasket put a little gasket like a rolled gasket on it or put the the welding blanket gasket like right on top.

C

Are you saying this is like a clash that comes down over the whole thing like or I'm not quite getting it's a it's uh like is the frame insulated on the sides.

A

This is the chamber like: that's that's what it is.

A

That's your bed and I have the bed here on a single because you gotta lift the z through it. Okay, so that's um gotcha! That's what I said. Let's not worry about how we mount that's the x-axis yep wait. Is that the x-axis yeah? That's sorry, that's not the x-axis, that's the bad mount axes, but that here that's most convenient to put them vertically.

A

So that's a consideration. We have to take.

C

Beds going up and down in the print head and basically you have a sheet: that's just moving around over the top of that box.

B

Yeah, what is the cheat? The bet? No and.

A

If you have, for example, that sheet is pei or polycarbonate okay, so we have four by four polycarbonate sheets. We can do but a four.

C

By four polycarbonate, so it's just like the head would be inside and it's just doing that yeah, okay,.

A

Oh, that's an easy way to show it with a hot coffee mug at 100, up to 187c.

H

So your prints are gonna have to be pretty balanced as far as.

A

Well, here, first of all, this is one axis. This was for a tiny printer here we have two two of those yeah.

H

Okay, I understand.

A

So we're gonna have to do. This is a complex thing like that's for tomorrow I mean, I don't know if we're gonna get we'll see after today. This is a basic frame structure. um So here I actually used angle.

C

And then sheet in between shell is simpler. Two axises you've got to have at least like two clams with a a bar in the middle, but then you also need to be able to open and close it super easily right.

A

Well, yeah, so what's what's the unloading procedure move the print up to the top and take it off so you've got.

C

An eight foot tall.

A

Isn't that insane, it is insane so we'll see how it works, but it might be that you have to have a second floor to actually unload your prints unless you design this chamber to be openable, which you can you can put a big door in there, but we're talking the huge stuff.

A

This is large, so we'll figure that out later, but I mean we should think about it now, but there is a clear way to get your prints off and that is you move the print back to the top and pick it off. So you fill your print with an axe at the end, there's a clear way to do it so, but okay, distraction from what we do today, but the chamber. That's why I was explaining why we need a six by six frame, so I will do a six by six frame, so we can do.

A

Quarter by four by four angle: let's, let's get a cut list; let's do it just do it so cut list.

A

Yeah, I mean the frame itself. That's.

H

You take one side of the frame off right now: the insulation uh-huh yeah, you just hold one side.

C

Yeah, though you just go ahead and move it down just.

H

C

Yeah now yeah sure, especially as you've got two rail systems that are going up and down that piece in the middle.

H

You don't want to use that, though, because then you can only pull out a small portion of your hip.

C

So you want it from the head from the head: yeah yeah, there's thinking.

A

From the end, what.

E

C

He's talking about the whole clamshell piece would have to come up somewhere.

H

Yeah or just one side that they have two, there have been three pieces: yeah.

C

It just gets one more complicated, more and more pieces.

A

Okay, so let's take a look at how this this will look, so this is quarter by four by four angle.

C

Do we have a nice great here.

A

Sliding miter we have it.

A

Okay, so that's that's this one piece here, uh because because the build procedure here is important too, so it will have two pieces like that, so this is on a table, so I'm going to draw a little table. This is going to be our um our big table. The five foot table.

A

So we'll um you can get nice corners, you can use the table as in your alignment point so from the top. So this is: how long are we making if we're going to make this 9 feet tall together? So we're going to need to cut eight foot pieces, then the top and bottom will add you another four inch.

A

No, no we're! Sorry! Nine at nine foot.

A

We we want to do like 10 foot because that's half of a whole stick, but it's like we're gonna get into issues of getting that in the workshop.

A

So nine feet is how tall it's going to be.

A

Because this is just crazy thing, so this is going to be nine feet by six.

A

Okay, so where does this angle on the side, and so so just think about the construction of it, because the build how we build this, like you know this is large stuff. So what we do what's going to look like is we're going to add how we're going to build this? Do we are going to stand the verticals up like that now we're going to build the long sides first, so build the long sides, two flats, two flat sides, and then we can connect them.

A

With verticals right, two four, how many pieces of metal do we need if we two four six eight there's twelve pieces of metal that we need altogether? uh What I would suggest is the following: four eight: this is the suggested procedure. Do the large side? First yeah! I can hear you because it's going to be easier to square it up later. So take a look at this. So so that's the oh wait.

A

There was a question for me.

A

Am I muted yeah yeah, that's unmute here, but we've got the video.

A

A

Do large size first, so what I mean by that, so the final product is going to be with the verticals. These are verticals of the angle and the the ones that are at the bottom they're actually laying like this at the bottom.

A

So you have to pay attention to like where, where do you inset these pieces of metal to make them weldable and stuff like that, so this will make sense a little later. So, let's, let's think about this 9x6.

A

uh Slide duplicates. This was actually like welding this on a table so welding on a table.

A

This is what I was showing here: welding you're actually getting on a table and you lay these pieces on a table, but you can only lay this one's going to hang off, because this table is only five feet wide. So you're gonna lay this one down and we're gonna weld the other one like this here. So there's gonna be a gap there, because the very difficult thing about angle is that you've got you have to make bevel cuts, which we have to worry about because it takes it's going to take too long.

A

So, let's just do this procedure, so your bevel cuts.

C

Mean measure cuts.

A

Yeah, like cuts that, um like you'd, have to cut the angle at an at an angle of 45, like all those and like all those it's like.

C

And you're just saying.

A

Cut yeah butt cut, do a butt cut, so you can just tack it on and then just scab it together now, but from the top it's a butt cut, and not only that you're connecting just at the little corners. So let's look at the this is what we're gonna do.

A

um I would say this is um this is what it looks like from the top.

A

C

The top and put it on the big screen yeah.

D

I'm not sure if it's on my side or not does someone else have their uh hmi uh laptop on his room.

E

A

Yeah top review so from the top view when we're welding on the table, all we're going to do is this: is this right here? So actually, this is going to be the long way.

A

Like this, we're gonna just weld the corners together, bam.

A

Why so, then we we make two of these. So what do we do here for these corners? Let's weld it with rebar little two sticks or rebar. We need to we're tacking the entire structure. First, we'll finish a little bit.

F

A

So right here we'll.

E

A

uh Actually would be useful to. We can do a square because no, let's do square square squares better, because that will allow you allow us to close up that seam with the final weld later.

A

So let's do a little square like uh you know, weld a square there, so this is looking from the top the the edges are facing up. This is laying flat on the table. So if you want to actually.

C

Just use a cut of dangle iron.

A

uh Hold on: let's, let's show: why not.

A

I don't think I don't think it would be as good, but um so that so that's the flange like here, that's the flange of the iron you're. Looking from the top.

C

A

Okay, okay box from above yeah, we're looking at from above. So that's the flange of that angle. Iron.

C

Oh and you just set that square on the inside.

A

So that's the flange, so I'm going to copy that here just.

A

Yeah, it's top view.

A

You've got that.

A

Then you've got this extended.

A

So, instead of that, one you've got this.

C

Those squares that you've made are oversized at the moment.

E

C

Because then, you wouldn't want them hanging into the.

E

A

Yeah, uh we can do like make them very tiny oversized. Well, just make them if you do them even like four by four four by four square, so cut it out of four by stock. That would work.

C

Because then, you've got width of the angle right part of the flange.

A

Like this much, you don't want this. You want to weld that so then we're going to put the verticals there, but this is what this is, what we do- and we do this build this twice.

A

So this kind of structure, let's clean it up a little bit.

A

And these this means you do cut. You do little cuts you you do these squares. You can weld this up in a second uh ie like in an hour. We should be done with both sides, both sides and then wait wrong one. I want this one and that one, so you make this this two times.

A

And what we'll do then, is put the verticals in between that? Would that suffice, yeah! That's eight sides. We built two of these.

C

The only thing that I understood you were saying we're going to build the.

A

Side panels. First, these are the side panels. Okay, the sides not.

C

The top and bottom top view of the side panel.

A

Yes, top view of the whole thing side panel.

A

And these are so. This is four by nine. No, this is six, but this okay, let's do dimensions here.

A

That dimension is six.

A

And the other dimension, so what's the cutlass? Can somebody generate the cut list on slide number one.

C

A

Six, minus eight six minus eight inches and and nine feet minus eight inches.

A

So the sides are that right. The members are eight inches shorter.

A

Can somebody do that? So that's six feet. There.

A

So that means that the cuts are not six feet or nine feet. They're shorter.

A

uh By eight inches um you build two of these, then you can you have your four other members and how long are the other members gonna be.

C

um They're gonna be another six foot, minus eight inches.

A

These ones are gonna, be six look at your corners.

C

Okay, because you're going all the way.

A

We're going all the way down, so the actual other ones. On top.

C

Of that yep yeah.

A

um Or cut list would be eight foot four inch so how many of those cut list.

A

How many of those um eight foot fours.

E

E

F

A

Five foot four inch and then four.

A

Six foot right.

E

They add up to twelve.

A

I know from deep involvement in these frames that they have 12 members or six members. If you make cnc cut them as flats.

A

That yeah 12. it adds up. So that's what we got to do. Then we can cut on the iron worker the angle shear. That is perfect, just perfect. Now what do we do is what exactly are we doing for the little corners? So, let's make those well. We should have some quarter by four, uh if not use like quarter by six or something like and it'll might trim out that little that little corner is not gonna matter too much.

A

So just if we don't have four by four do like six quarter by six by six plate.

A

How many of those there's going to be eight of those so add that to the cut list quarter inch by.

A

Ironworker we have that or six inch.

A

Must have some of that so a cut list.

E

E

um Quarter inch.

A

By 4 inch by 4 inch flat, ideally okay, what about rods.

A

How long are the rods.

C

Somewhere right about there.

E

C

So actually, nine feet: where do they want to be.

A

I'd say: yeah nine. What.

E

A

E

A

Be slightly the solid, the z-rods, so solid rod, they're, solid rod and hollow rod.

A

um For solid rod, what do we got.

C

Or nine feet minus, maybe because we want them to go all the way through these, the the.

A

Yeah some rest on the ground.

C

A

Just rest on the ground: nine foot- eight: nine foot- uh that's it! Let's do the rest hollow because that's the big ones we'll make that so hollow rod that.

C

A

Oh hollow rod, no cut list good.

C

Oh yeah no cuts and you kind of get.

A

The hollow in the night, now they come up to up to six foot.

E

C

I was gonna say: if you could, you could do one solid and one hollow just to like you get the.

E

Strength from the solid yeah.

A

But we don't, but we don't so how about how many of them do we need? Anyway, that's pick list.

C

D

C

Four for the whole right.

A

Yeah yeah that's going to be the y-axis! Now what about the yeah? We have to think a little bit about what the.

C

A

Two four yeah well: this would be four for the y-axis four six foot, so otherwise yep.

A

You're, a carpenter, you got that team who wants to be carpentry team.

C

A

You don't want to do it.

C

A

I think you're, like the only guy here that can do it also.

C

H

You must, I have power skills, but um I was actually looking at the uh a little bit of welding. I had some experience with that. I was thinking about taking the bed.

A

Taking the bed: well, let's not worry about the bed yet or do we want to worry about the bed now because we're bottlenecked for rolls so so one is the cutting cut.

A

Angle, that's quick on the ironworker um that someone could jump in there right now. But after that, it's like, oh man, the welding welding requires two people. uh If we work on a table, two people pretty much can weld like opposite sides.

A

Now we don't have. We can do it on the floor too, and you can have another team of two so four, but then you have to cross measure it because you don't have the table to align two but anyway, since the table is not big enough. Well, we're gonna have to cross measure it to a line because we're just tacking the corners first.

C

Just on this side,.

A

C

We found replacement photosensitive photocells up here. It seems like it would be very smart.

A

um Are those working do they work.

C

uh The replacements.

A

C

E

Oh yeah they've.

C

In sealed bags and look brand new.

E

C

A

Yeah, if they work, then would be good um now for do we, we don't think we have four good masks.

H

A

Yeah, do we have three good ones.

C

I am not super confident on them all, because they like kind of kick in, sometimes not all the time.

C

I don't know if people are tracking it enough and if they're not they're damaging themselves.

A

So um understand the thing about darkening like if it does not clearly visibly darken to a very comfortable point. That means the thing is not working you might like. If you weld and it does not darken, I mean it protects very little, but that's not good enough that you have to have that darken on you so quit. If you see it not darkening can a person can any one of you tell when it's darkened than not?

A

Can all of you tell that.

D

Yeah, I've never yeah, no.

A

Well! Okay! So before you do that.

C

E

C

Will turn on if you get in super close, but when you're in that close you're getting a lot of reflective light back up in.

A

That's called the reverse, redneck yeah.

C

D

A

Yeah, okay, well, um so make sure that masks are working and we have. Whoever does that uh there could be up to four people, but a lot of that could be just layup and one person welds. So it could be still four people. One is an assistant. Another one is the welding guy beyond that so rods I mean man, um there's a 3d, printed, printing team, that's that needs to happen.

A

So let's take a look at what we've got to get on the same page on that, so here's the cad files. um So we've got these, but let's, um let's migrate to 3.5, maybe.

C

I have like a tiny bit more adjustment on like setting up like that stuff on my printer um before it's gonna print properly like what um I just moved, something and now it's not printing, quite right.

E

C

Substantially by accident, um I was trying to reset the bed and then it started catching when it was printing and not yeah. I don't know.

A

I tested all of them, they didn't catch for me last night, but you did last night.

C

Okay, well, there you go. It works great.

A

C

It's not attached properly at the moment.

A

By the way I took after your hint of the post, you know it's quite true.

A

Okay, um let's take a look at rod test file with bushing, so let's print all these things. So what are these things? One inch rod test with bushing, so this is basically where you've got.

A

Is it updating there?

A

So it's opening this one up. um So that's the one that has the I did 0.675, which makes it 1.35.

A

For the diameter, that's just a test: this would fit. You want to do 1.25 because the tools will fit the bushing which is 1.25 here. We over did it so it because it has a little bit more narrow, actual hole. That's printed! So that's this test print. We should make sure that that fits.

A

That's one inch rod test. I actually got the sdl here already, so you can. I actually got it on an sd card, so you can do this. I've got all these on sd without bushing.

A

So actually you might want to copy these, because I mean we can run they take like 20 minutes each, but there's all those files are here as g codes. One inch rod test no bushing. What's that mean.

A

A

Adjust the hole with one inch, and here I did 1.0 uh one point.

A

What happened here is that the right one, oh yeah, that's the right one! No, oh, wait! What's it? What's it say um yeah, I think. That's! That's the one if you measure it, but it's labeled wrong, but it's actually the right one, so that should be like 1.1, so in other words adding 1 10, which is that should get it right to have a rod fit what if it's a little loose well check this out.

A

If it's laying on the ground that's loose is good because it's laying on the ground and then at the top, it's just held by all together, it's held by gravity with the concrete on the ground. So if it's a little too big, that's okay! That's for um yeah for the z-axis!

A

That is good for the x and y's. We want to.

A

How do we clamp those down and end clamps like what ken did.

A

So, let's see large printer.

A

So what you notice here is those do you have the end cap file or so, if we've got these holes for the bushings or for rods, if we close that hole.

A

That's your fix, the equivalent of a clamp bolt on the y-axis for the z-axis. It doesn't matter it's held by gravity and it's heavy enough. It will move anywhere here to if you want to cap that so the rod doesn't slide out, because if the, if the carriage is moving- and this is a carriage well sorry, this is this- is a carriage. So this is this you're just clamping down the bearings the bushing, so they don't don't fall out.

A

So it's a it's a cap with uh diameters slightly larger than one inch but smaller than 1.25 inch.

A

So, for what's more, that's idler for either piece here we would be actually uh closing off the end, so the rod doesn't fall out. If you understand.

C

D

A

Instead of clam bolts yeah, so that's good it'll work, but we should redraw them, I'm not sure about the exact dimensions of these. How close to 3.5 inches are we on some of these files because we said for ben we're going to do 3.5?

A

Well, so let's look at one of these and see exactly what we have. So if we download this.

A

A

Right so that's.

A

Oh, that's: the carriage.

A

Is that here now it's.

A

Where did that go space.

A

So, let's just open it up from here again.

F

B

A

Well, maybe you uploaded the wrong file, um but this spacing between the holes should be identical everywhere. Here, let's see.

A

So, what's the key is: what is the distance between these two centers? We said it's 3.5.

A

A

So, let's see, if how close to 3.5 that is.

E

A

So I'm going to select that point and this point and then it says: 3.53. Oh, very close, um three point: five, three inches three hundredths of an inch can we we could just print this out. Maybe do we think yeah yeah, it's only 300s, whereas the oversize we're doing is 0.1.

A

We should just try this. Let's start printing, these that's good enough.

A

Yeah um so wants to be the print team.

F

E

H

I have very little experience with 3d printing. um I have a bit of experience with carpentry um and a little bit of experience with uh welding, so I can pretty much work in.

A

H

A

Okay, so carpentry 3d, printing and and frames what's the role division.

B

A

Yeah we can parallel. So if we parallel yeah how about do that and 3d printing 3d printing.

A

Okay, okay, maybe yeah rest fast, uh so ken well, it sounds like we've got a team, we're a little sparse.

A

I had a question about so right now we are starting month two of intense fury of stuff, and I would I would say we actually take weekends off. How do people feel about that definitely says. Can.

B

Saturday and.

D

All right, I only got a week left so I mean what that do to starting the um the 3d. uh I mean the metal.

B

Kind of I think, maybe.

A

Okay, so start by taking sundays off, which is decent and saturdays, go all out or have a lighter day or start so half day.

C

Yeah, I was gonna, say, there's always stuff if you've got the mojo to do it. Well,.

A

There's plenty of stuff to do. Yeah.

G

Like I was happy to work every every day, I was here because I'm only here for a week, um but you know people here for three months.

E

G

Yeah, but I think.

B

Let's try to work as much as possible and there are still unfinished things like the tracker. For example, I don't know.

A

Oh there's plenty of backlog. If you want to do that um now. Actually what we do want to do is dismantle the house because that's not going to get dismantled. Otherwise uh that's the thing I would propose like one of the first things we do because we're pretty much done with that. As far as what we wanted to show, we have all the modules.

A

So if we wanted like, for example, outstanding things like siding, we can take, you know, put up a couple of modules and work on the siding, but we don't have to have the whole house it's more important to get it out of the rain right now, because it's just out in the rain, so that'll be one of the first things. Let's see, um okay, so sunday.

A

uh Rashard, how about you does that sound okay with you or not, really um what what's this, what thursday, friday friday friday well saturday, oh saturday like as in tomorrow, you're talking about, I was actually looking week after this week this week we kind of yeah we have to go. We have to go so we're talking about more like the 9th 9th and 10th.

A

So maybe we could take off what day.

D

Are you leaving I'll leave the side of the morning? Oh.

A

That works, oh perfect, so maybe we take. We go full week this week and take off saturday sunday next time.

A

Gives me a chance to do my go. My 30th high school reunion go back to high school.

B

That weekend.

A

I'll rumble into that fancy dinner joint on my tractor.

A

Perfect, okay sounds good, so we'll take it. uh Yeah we'll go all out, and this is exciting. I mean man if we can get any of this done. This is very, very powerful. So let's see how far we can get in the frame. I want to get this thing done by lunchtime.

C

Yeah fully functional yeah.