Open Source Ecology Development Team, 7 Feb 2017

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From YouTube: 3D Printer Construction Set - First Working Meeting

Description

See working page - http://opensourceecology.org/wiki/D3D

Builds on the universal axis and 3D Printer Construction Set - http://opensourceecology.org/wiki/3D_Printer_Construction_Set

A

Yeah, okay. So let's chat, let me let me break in here, so, let's I recording here but so yeah. This is our first very humble meeting of louis ozzie 3d printer working group we're building team right now, so we're interviewing a bunch of people this week, and hopefully we can give the velocity up, but right now we're going through a basic, critical path document, so so line up a plan for what we can do over the next next few weeks.

A

So the idea is to run a workshop in Germany, which we have pretty much scheduled more or less for April 22nd right now, that's a week after easter and then we're looking at. How do we get there? So the the good thing about the 3d printer is that we can work off existing 3d design, 3, open source designs, 3d printer designs, because the reprap project is pretty much paved the way for that for a number of years and can pretty much take examine what are the best practices out there and then copy from them.

A

As a first start of you know, where do we start on developing a complex machine? Like the 3d printer worth well, the good thing is: there's plenty of work. That's been done before already and we can build on it. So that's a let's approach and then so so some critical elements, so what we want to do and I'll refer to this roadmap, but on a road map.

A

First of all, we okay. What is all the work? That's been done. Well, we have also done some of the work to take the existing designs and make it more modular. So last year we have developed or formalized the what's known as the universal CNC axis, so I'll actually share my screen on that.

A

Let me share that with you, so you can see what I'm looking at on my screen. So I'll share my screen here.

A

Sure. Can you see my screen yeah, so on a universal cnc access page on the wiki you can see, we have come up with a design of an axis that can be used, its belt driven. It's got very simple belts and we actually put it in. We have the 3d CAD for it already, but- and this is what it looks like blown up- it's a few- this works here, so we have the full bill appears we actually prototype these already.

A

We have several of these laying around and the way it looks I'm trying, there's actually a WebGL 3d explodable diagram. Here, that's still loading it will pop up in the second was idea of the frame. Sorry, the universal axis is that we have an axis that can be used for so this is how it looks it's kind of like basically, your 3d printed piece with a couple of rods on your motor, that's the extruder part, but it would have the drive motor.

A

So we hear the print 3d print files, and here we go with the actual picture, so you can see we have a full 3d diagram of this, so this is a basic axis. You can take a look at this and rotate it around there's actually an explosion here. This is thanks to michelle Dory from from belgium. This is like.

A

We have got the full detail of everything that goes in here, and this is actually based on a true, so I, three looking at the concept of a simple axis and then refining it to be modular, meaning that this we can put. So let me show you the open source, ecology or you can make that into various configurations from a small 3d printer. So if we go to.

B

A

That's the whole point, so I'm going to click on that 3d printer workshop, so you got this little little actress and right now we're working with three-eighths inch rods. So you can make a simple 3d printer out of that. But if you scaled it up, you can you can make many more different things. Like so say, this is the basic 3d printer. This is explanation of the axis. Now you can make a larger thing so think about just enlarging.

A

Enlarging the rods and multiplying the axes or using larger, like here, you might think these are would be like one inch rod so for a CNC router. So you can do a lot of different things with its basic. These are all the same basic parts and the XYZ axes. Axes are identical and that's the point we're reducing the part count so like, for example. Here is a z-axis slides up and down on two of those modules and so forth. So that's the general idea.

A

That's the that's the pattern we want to do so we think we've got the net the frame, pretty much nailed the frame and the axis universal access. Pretty much nailed so what else remains well there's a number of things. So so perhaps the number one thing to think about is so: let's go back to the critical path, so we need to fill in two other components. What are the other parts of a 3d printer you've got assuming I can increase the size of that there. That's so I'm, going back to the document.

A

Mommy increase the size.

A

Yeah, so what are all the Clarks of a 3d printer? Well, there's that's pretty well defined to get an extruder. You got a frame. You got heated bed.

A

So right now we're working on an extruder. We can say the frame. You know we have good prior art on the frame we're decent on that. As far as the universal access to do universal axis, that's pretty much done frame. That's easy! We just got to get some quotes and put this up again, but that's the question right now. The working question right now is extruder.

A

Let's take the extruder so the way we approach it is minimum viable product. So what's the simplest way to get these things done so there's extruder, there's the controller, it's a big one, but let's think about the simplest route we can implement. So let's take a control that already exists. An extruder that already exists, an adapter to our you know, make it fit with our universal access and frame. So that would be the approach.

A

So the controller.

A

Take one off the shelf.

A

And then add them to the universal access and frame, there's also the heated bed. What else we got automatic hide sensor, which we definitely want to do that because that's already available automatic height sensor and what else do we have did I say heated bed, yet there's n stops for knowing where to put it. When thing is at the end of its motion, that's kind of like with the controller and stops power, there's power supply.

A

So that's pretty much the some of the major components that we have for a 3d printer breaking down into different modules, but all these are pretty much decently worked out, but our current step is at this point: it's the extruder so deciding on one the best choice and moving forward with it. So we looked at the we have a tech tree of choices for the. If we go 2d 3d page on the wiki called be 3d. That's our working page.

A

A

We've got so we gotta development template where we put in all the work, that's being done on this project and we have the module breakdown, so the d3d extruder, so I'm going to click on that the d3z extruder. We actually drew up this tech tree of choices, which means like looking at all the available different extruders that are out there. So we looked at that a little bit so actually mapping out what are the different features and then I also put the requirements in this thing. So, let's see, let's zoom up on this.

A

So all the open-source extruders well there's different ones. So, there's like there's loes bot, which is a good open source company, which makes, for example, the more strugar which is the sergeant, but the price is pretty happy. It's like the more shooter is like four hundred dollars by itself close about many extruders like $175. There's these other much cheaper ones like III dv6, it's actually what the Prusa i3 uses.

A

So the precise 3 happens to be the most popular 3d printer in a world right now, actually most of the printers in the world right now, our Prusa i3. So now, that's that might tell you how you that, maybe that's a good point to start with, since it's actually rated as one of the top printers for print quality and everything else, and it's got a nice little 3d printer extruder.

A

So actually I put this here and here's a build manual for that, so actually full instructions for the 3d printer extruder already exists, and we can take that and I would suggest we build on the crew, so I three, because it's the most popular lowest cost option. That's out there. So where did that build manual? Go so that's a link right there actually and the diagram.

A

You can click it and it takes you to the extruder page from Prusa i3, which I said is a good choice, so we just might as well build on it if it's a good choice right. So where did it go precisely extruder?

A

Not that's the wrong leg!.

A

um I want to pull that up from my email. That link is wrong in the diagram, so I've been in contact with the people from the crew, so I three asking about the 3d printers, but there and I wanted to get one, but their delight time. Their lead time is about seven weeks, which is really too late. So I could ask them if they, if they have any any ones, that they can ship any sooner like any kind of a old model that they might have.

A

But here's the 3d printer manual from Prusa i3, there's the assembly manual actually for the for the extruder.

A

So here it is so actually boosts our research. The precise three people has an extruder assembly complete here, so you can see how the complete thing is made. It actually has the 3d print files and it goes through the complete procedure. So so with the Bill of material. That's an e 3d nozzle, it turns out it's hot end is open source. You can print in all the different plastics, so it kind of shows you what all is here. So our next step would be to take this extruder and start working with it.

A

So basically get a complete instructional I mean here is a complete instructional. You can say, but now let's take a look at so the first step would be okay, and where do we find all the parts and how do we source all the parts?

A

If you want to build this thing, and the second thing is well, why not well, we can use their actual axis and we can go with that and that would be easier than mounting it up it on our universal access and perhaps that's a that's, a good way to go for now to completely replicate what creuset I 3 is doing here so that we minimize the time to market her time to product. Here we can take this exact manual and go from there in terms of making our 3d printer work.

A

So this is, you know, there's a lot of technical detail in here, but- and so it's so like this thing right here- that's actually their height sensor, which means that it betta matically levels of the bed. So the task for this week is to go forward and open sourcing. This open sourcing, basically two, are basically adapting it to our frame so that what I would suggest is we take this exact printer assembly replicated get a bill of materials, so what we probably want to do is start a document.

A

Let's see, let's go to back to d 3d here and we have the d3 d2 extruder document, so we can go click Edit on it and then we can say: okay as our point of strategy, let's go with the prusa because it's fully open source and available for replication and it happens to be the best printer. So we can't we can't go wrong with it. So let's do that as the first cut. Does it make sense? Well, yeah, it's it's a decent decent shot at what to do.

A

What are your thoughts on it so far, I mean you think we should do that. Is that a good route.

B

B

B

Semin type.

A

This is not what we.

B

Were talking about?

B

A

So actually, if you look at the research, so if we open up a new window and go to prusa research, Russa 3 d.com, the the statement on that is that it works with many many print print materials. Look at this supported materials, pla, ABS, PT, hips, flex, PP, ninja flex. They would lay brick nylon, poly carbonate. For us. The critical part is polycarbonate for glazing, a rubber for rubber parts and o-rings and wheels once we scale this men of standard filaments like PLA and abs. So it looks to be fully.

A

Two filaments: together they have an expansion; they have a different head that they can do that with I. Think I think they have that they have add-ons, which we don't need to worry about for now, because we can always add that in the future right.

A

No, no, it's a the point is that is because it's modular, we can simply replace that head like print some different parts or make it different and then go to multiple filaments. If you want to do it, but we don't need that right now, I mean not really necessary at this point, so we can go with this and then the next question is, let's see so it can print in multiple filaments. I just wanted to check my email, so I was in contact with the guys from creuset, 3d and.

A

They don't have a bill of materials which you can find STL files for the printable files, the mk2 kids printer can print t, ET and flexible materials. You can see the ones we have already tried in our shop I believe the rest of the part on the mk2 are open source. Let's please, let me know if you're interested in some specific part and I will check it for you. So we can. We can ask them some more questions, but yes, so that they can print in multiple materials.

A

Already with that single nozzle, apparently, and we should find out like how well it really prints, but for the sake of rapid development for the workshop, let's just run with this full force, full steam ahead, knowing that this is one of the best printers and then we can say: okay, if it doesn't do well on, say some kind of a material that we like like rubber, then we can of course go back to it, but first step would be to really master the existing technology right now.

A

So they say they don't have the bill material so, but we'd have to pretty much see if we can start tracing tracking and down so one way it would be too well. I mean what we want to do right now is go to well, take a snapshot of this and pretty much. We have the 3d print file, so we can.

A

We can / 1 start building a 3d model and CAD. We can do this in cat and we can import it'll be nice to import all these parts into cat because I don't think they have a. They don't have a 3d CAD file somewhere. We should find this exact, exact model which they don't have.

A

We can search on the internet, maybe ask them if they do have that somewhere we can follow up with them, but we can as well start generating it in a free cat and I doubt it, and they would have this file here somewhere prominent to make it again.

B

A

Yeah definitely so we want to do that. Use this now. The other thing worth exploring and the question is: do we want to do that now or not is get the you know how this is mounted on these three bearings here? Well, if we copy this exactly then we're not using our universal access anymore. You see like we wanted to simply attach the the extruder to this axis here.

A

To this point right here, that will be our attachment for the 3d printer now, perhaps see, because what we do like about this is we have this very clever way of belt-tightening you're, just putting these pegs like the basically the we detail in on that and exploded.

A

What you see is that we've got these two pegs, so this is already designed. This peg goes into the slot there to fix the belt. The belt goes through that little hole in the peg, so we feel that's a really simple way. It's actually from what we see it's much simpler than all this stuff here, where, if you look at this picture, it's pretty complicated, actually, there's multiple parts in there.

A

If this is not as easy to tension the belt as our method, but I think we can go with it just for try one and just fully just fully replicate this. Since that's the easiest path at this at this point, and then we can go back to taking this and making it fit on our universal axis. So we use our same belt tensioning system, as we already use, make it easier because I think right here, like all that complexity with the belt tensioning, plus, all these little little straps.

A

We just have a clam shell structure in our our design. We've got this basic clam shell structure. That's you know pretty much as easy as it gets, and it's used throughout the point of this to make the simplest kind of a design possible, and we think this does it, because this is used for all the different XYZ. So I think we're very happy with this.

A

If this works really well very simple, so the next iteration we would take take the existing looks shooter that we're doing right now and simply mount it on this, but that don't let's not worry about that right now. Let's take it one step at a time, and that is to do this one one extruder, and if we get it in time that we can actually modify the extruder to do this, we can do that in this development cycle.

A

But if we're at a time we don't you know, we start with just copying what it already exists before we start modifying it. So we can at present use the end these ends. We can use the one end piece and the second entities promotion we can use and then we just use their access.

A

The sorry the extruder use their extruder so right now the idea would be to build up the model and 3d CAD try to get all the parts and go so go through this and see how far you can get study this in detail. So this is a so let's do slide.

A

New slide, or let's get rid of that one and just.

A

Duplicate slide, so here it's useful to go to say, slide, duplicate slide, and then you can pretty much. You know get rid of everything in here and say: okay, Prusa, i3, extruder.

A

You so use existing use. Current.

A

Through so I three extruder- that's that simple! So here I can put a link to this.

A

Gone through that, let's close some of these.

A

A

Where is the doc right here, so Chris I, three extruder: we do this one just put a link in there.

A

So so the idea here is build on colusa. I three so does this right make sense, yeah.

B

What's the cutting that's really weird stuff? Oh no,.

A

We can't if this works, we're done. That's the beauty of it, it's open source. So this is an example of really building upon another project and because our frame system is flexible, you can adapt this exactly to our current frame so step one so steps.

A

A

3D CAD file of the above extruder.

A

So we know that the you can simply import that steals. The SPLs already exists. Stl's are available need to pull in the pool in basically import other parts like stepper motor bearings,.

A

Nozzle, the hot end you know etc so and then make this all available in three cabinet formats so so create from so the step number one.

A

So create individual files of all the parts first and then we can use the master files assembly file.

A

Then create a master file then create an assembly file file. Does that make sense, so so the workflow, that's good, really good in freecad is that you create individual files in free, can't format for the individual parts, and then you view you import them into a final assembly, and that means it's much easier to navigate that workflow works well within a freak. Add an overall assembly file so.

B

How is a fan of megs.

B

A

Well, we have to find everything we like. This is where we just gotta searched like online. Just look at stl or step files. Now the problem, the most useful thing is: if it is, if you can import it in step or freecad native format, so the strategy, a good strategy, would be to look at.

A

Strategy, look at other 3d printers, look at other open stores.

A

3D printers and see if you can simply take the files from there you take take apart files from there and I basically strip it down. Basics like we're, open source, Chop Shop, you strip out the files, the parts from the different and take parts out of those cad drawings. You know, like you, can parts out of other.

B

A

But specifically like the most useful would be like free cat files, because then you know you got native format specifically free cut files, then step then stl, because I think the sdl you want to go from stl. The free cat can't really work with FTL's. You have to convert it, import it and turn it into freak ads right. So you have to do some file management issues there and then also mcmaster-carr. Have you heard of that.

B

A

Step files that files yeah- so let's do this and then but wherever you have so so then cut and paste pictures.

A

Into this document like once, you have assemblies like then we can so. The next step is next step. Is a visual bill of materials basically like put in a picture here and then part labels and links to the actual parts.

A

Yeah should do a video on how to do a visual part. Diagonally you put in you, know your your CAD, you label it and then the different arrows point to different parts and there's actual links to the park, so we can create a full bill of materials so like, for example, if you find that little bearing on ebay put a length or Amazon I mean for us, it's amazon, it's pretty good place.

A

We can also find about like bulk sourcing later, but just individual just right now, the stuff we can buy readily on ebay and other places. Now we can put links to that. So we can get a bill of materials for, for this, extruder maintain being the nozzle. You know the e3d nozzle so use it's got the e3d hot end. It's called III d.

A

There's a good link to that one. It's that one's was open source, so III d, you look that up hot and be 3d. Wiki has all that stuff. So yeah they have a wiki, which is this right here, III documentation, so you can probably get the get all the parts.

A

They might even have step files with that of the hot end and then check, but so the task is, let's generate that CAD file and then upload upload Cadfael like whenever. As soon as you have anything like, you know any of the individual parts files to the wiki or just put like if it's already up some. No actually you should reload it to the wiki so because say, like the file disappears from somewhere else. Let's just be redundant and put all the files that you use put them on an upload amount of wiki.

A

So you'd have so we have this page here and d3d. We've got the extruder page so document on ad3d, extruder page and then let's just create a create a part files.

A

I'll just do this four-part files as soon as you've got any part like including those simple STL's from the booster research site, just up reupload them here so Clark files. Let's just do a very simple thing like so part files would be 3d printed.

A

Other so here we can simply say so, so you know whatever its name is a part 1 and then just put whatever the part file whatever that FCS DD.

A

Yep and then part two and so forth, so so we have an exhaustive list of partisan and then we can do things like calculate how much print time it requires. So from from these parts here we can do we can start getting into fabrication. You know print time. For example, print time is important. Is you want to find out how it difficult is to print and then 3d printed, there's metal, so other other parts?

A

There's fasteners like a lot of the screws and bolts, it's going to be a big category yeah. So so, let's just put everything in detail. So just just the bullet points, that's how you do the bullet points on or if you've seen that just to start the bullet point, then we can come up with a complete fun and once we have it, we can I mean let's do this as soon as we can.

A

If you have any time just get get onto the see if we can complete this so next monday, we're looking at this and seeing if we're missing any parts, so the goal. So actually, what we're supposed to do here is startup, ad3d, log or meeting log. That's what we promised so first task with the task assignments. So what I can do so? What you and I can do.

A

A

A

So monday, 56 2017.

A

A

Generate 3d CAD file.

A

What I can do I can definitely look at parts source and get get visual, build materials.

A

Started so next week we're looking at okay, we've got the entire Cadfael, we can be looking at on freecad, and then we have the entire bill materials. So we actually have so. The goal is 3d CAD file assembled and then visual right, 3d file of extruder.

A

And calculate the price so so so V BLM complete and then total price, total price and sourcing available.

B

A

Let's see where we are at that time. By that time we hope to have another person on team. We can get going a little faster and yeah. The goal is to get one or two people per week added to the team as we go forward. So that's our current accreting go I'm gonna, put post some recruiting announcements and continue on as much as I can here mm-hmm.

A

So that's that's our goals for for this week. So is that that good do we do? We have any questions? Any questions.

B

A

A

Yeah all the parts of the extruder plus the actual assembly put together and you will probably find.

B

A

And and the whole assembly put together, so you find all the parts and then assemble them within freecad and what you will do is you'll find other versions of Prusa i3 is out there on an internet, but there were not going to be the same. So we have to do this complete. We can't just say I'll, just look at that other part, because it's similar well that doesn't work. You have to have the exact thing.

A

Otherwise it just won't work and you have conflicts right, so we pretty much have to do it from scratch, but we can import any parts that are identical to the parts we're using yeah. So this shouldn't be too difficult in 10 hours.

A

You could probably get get it pretty much done, hopefully we'll see how far we get by next week to see where we are, and as soon as you upload anything I'm going to try to find parts and upload do that I mean we're working in I mean the point is we're the goal of these team meetings that we're working in parallel so as soon as you've got any other files, upload them to the wiki, so that I'm not replicating your work? Does that make sense.

A

A

A

Looks like he popped off so to finish up, let's finish up with an email and that's the the whole goal is that we're working all together on the same thing. So as soon as we've got any material, we upload it to the wiki so that anyone else sees that that's already been done and we together assemble the complete extruder.

A

So anyone who joins the project and actually join that process and collaborate completely pending their knowledge of the free CAD package so and that's done by passing the ofd freecad test, which is part of the recruiting strategy. Okay, so thanks a lot. This is it for the first meeting and we're going on a 3d printer. Take care, see you next week.