Open Source Ecology Development Team, 6 Feb 2018

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From YouTube: Dev Team Meeting - Feb 6, 2018

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See http://opensourceecology.org/wiki/Current_Meeting for notes.

Today we cover:

1. OSE Critical Path for 2018
2. Biodigester
3. Prusa i3 extruder for D3D
4. Power Cube
5. Wiki Templates

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A

Okay, welcome everybody, February 6 meeting of the OSC development team. We just got ok, we don't have too many people on right. Now, let's see, can we get somebody to take notes John? Maybe you can take notes. What we do typically is on page 2 in a working document, and the working document is right here and we pasted that, for everybody.

A

All right there's the working back page number. Two. Typically, we take notes, meaning just all the salient points, so somebody who misses the meeting they can go through the notes and look at all the assets presented during the meeting, presentation and them and I'm recording by the way. So all the meetings are recorded for everybody, okay. So, let's start with with the agenda for today. So a few things so I'm gonna report on a digester, the bio digester for the seed eco home I'm gonna start talking about the roadmap for the year.

A

Some work on templates within the wiki, which is actually quite interesting. Then we've got the filament run-out sensor on the 3d printing that we have d 3d Australia, let's see on a pipe and fittings library. Do we have update on that as well? I think we should include that and the next steps on that PVC, pipe and fittings is actually I'm kind of getting excited about the low cost accessible way to do the 3d printer frame, which is PVC pipe. So we get definitely can build on that as we talked about before.

A

Ok, so first thing. Well, first of all, let's welcome John to the team. He's our newest developer. So I got him going already on on the filament run out sensor he's in yeah, just gonna get involved, get him on as soon as we can to a lot of things, including prototyping, like 3d printer.

A

So we have another person doing it and as far as the the 3d printer goes, you know when I think about low cost, easy replicability for workshops, especially say you know, I'm going somewhere traveling like I'm, actually doing a talk, for example, actually sign up for the open-source Leadership Summit, but anyway, wherever I go or anybody goes it's interesting to to have the ability to run a workshop as part of us, they say, there's a speaking event or events like say.

A

Let me pour for me personally when I'm traveling I can take the 3d printer on the road and actually organize a workshop on top of whatever I'm doing elsewhere. So that's that's a good way to piggyback the effort. One way to make it very easy is like say you know we buy. You know online.

A

We we get all the parts and and local parts like the frame we could get PVC PVC from a local store somewhere in any town, so that the frame which is pretty much the heaviest part of the machine can be sourced locally, wherever wherever we go. So that's that's a motivation for the the frame PVC frame. Okay, but let's, let's talk about some products here: I want to go through the digester.

A

So if you guys want to download the actual file, I'll go through that and talk about it, because it's actually a pretty interesting, pretty interesting addition to to the whole seed eco home and we're thinking that that will be a replicable part of the CD go home. So let me see, let's click on the bio digester. So and also, let me share my screen here, so everyone can see what I'm, what I'm looking at so yeah.

A

If you guys take a look at this, so the digester that we that's currently fully designed and freecad and there's just missing the missing parts out of the freaked out are a case for it. Basically, an insulated chamber probably frame up a 2 by 4 structure with insulation, because the digester wants to be warm all the time. So, let's see, let's look at the bio digester here on my screen as freecad loads up here, yeah that file and I ended up being about 10 or so megabytes.

A

Ok, so what we have is and I'm gonna just.

B

This lease water advice, yeah.

A

Yeah, so that's wastewater, generating a fuel gas out of and I will go, go through all this. Let me just go through all this here: I want to make these transparent here.

A

Yeah, so that is a wastewater digestion and John. You you're familiar with some of that, but anyway this this is gonna, be this device is gonna, be fed from two sources and and the inputs here are actually this pipe right here that I'm, showing and that's gonna be coming from both the kitchen and the toilet, both of which are equipped with a macerating pump which will inject water plus the organic solids into this digester and there's select ability, there's, you know, there's there's a valve there, but there's select ability between one and the other totes.

A

So it's essentially two modules. Each one of them is a cubic meter. We can operate one or the other or both in some way, but we can switch between the one or the other. So that's the inlet right here, this green pipe, so you've got the fluids and solids going into this digester, which gets filled up all the way to the top once it gets filled up all the way to the top. Let's, let's take a look at the the top one, since it's easier to see the bottom.

A

One is essentially same thing, so this is basically two stacked on top of one another, with identical plumbing with the same function. So here the top one. Here's the overflow pipe this pipe right here.

A

Which will suck effluent from the midpoint of the digester, and that's this pipe here- is the down to the drain. This actually is gonna go into a a rainwater garden or a leach field. Rather that's this is going out to daylight. This is this is digesters by the way inside the house. This is inside the utility room, and this pipe down here is gonna. Go to the outside to a leach field.

A

You can call it septic fertigation, so for so that the effluent, which is basically fertilizer out of the digester and this top pipe here- that's gonna- be a vent. So you need to vent this stuff here too, so that you don't have vapours building up inside now as far as the gas outlets. These are it here. The gas outlet is this pipe here and basically what it is that pipe goes inside to the digester. There's a hole at the top here that you see, which gets the gas from the top layer of the digester.

A

So so the gas is gonna be escaping out of here, and this is gonna- go to an external gas bag at 3 cubic meter. Gas bag once again, there's one at the top and one at the bottom here. So these are the two guests outlets now there's one feature which is the circulation pump here, which is down here.

A

It's a once again a macerating pump which can feed once again, both from the bottom or the top, depending on which which tank is open and that sets that sends the it recirculates it might run for maybe like 15 minutes a day, but it basically it does stirring action so that you don't get any blocks or anything so that so the most critical parts are where all the pipes are the effluent and a gas pipe.

A

The basically the insertion point, the injection point from the circulation is gonna, be here: it's gonna be going towards the pipes to shake up things to shake up surface scum. Make sure this this hole here for the gas doesn't get clogged up, but basically it's a recirculation to get everything active and running now as far as heat.

A

So on the bottom here we're gonna put a coil running from a solar heat exchanger, that's in the greenhouse, so that's gonna be for heat as the digester wants to be about a hundred Fahrenheit or like 30 40, 40 Celsius at all times for best operation. So that's that's that and then exhaust here so drain. If we ever got a drain, these things for maintenance- that's that's the main drain here and that's about it. So the cabinet here is missing. There's automation!

A

That's missing like, for example, the timing of the pumps as well as getting the the hot heating happening only when needed. So so the heater that's gonna, be in the greenhouse, basically feet of black tubing and a ceiling of the of the greenhouse is gonna heat. This we might consider also an electrical pad for days that it's called but or not sunny, but that's gonna be turned on with its separate circulating pump to to heat the system.

A

Initially, I thought about putting the heating calls inside the digester, which is doable, but if this the whole thing is gonna be insulated in a in an airtight container, probably like just you know, like 4 inch, 6 inch thick insulation as much as we can to keep it really warm in the winter. Well, that's that's! Basically, and that's that's where we are.

A

This is what's gonna get built pretty soon here, I'm gonna get parts like this week and will report on the function, but basically this gas outlet is gonna, go through a little scrubber little filter system to a a burner in a kitchen, so we're gonna have one as the regular stove that we have in another for experimental purposes is going to be the burner in the kitchen. That's gonna provide real, viable, cooking and optimal productivity. I think that the figures are a cubic meter per cubic meter of digester volume.

A

I mean that's huge volumes of cooking gas like one of these tanks. One cubic meter in principle does the full full needs of a normal family when everything is cranking a cubic meter per day, which is pretty insane in terms of that's. That's a lot of a lot of cooking gas, we'll see how close to that we can get, but with two tanks like we have here, we should definitely be able to feed all all our cooking needs from this.

A

An idea is if we want to feed it extra material outside of kitchen scraps and toilet waste where, by the way the toilet separates the urine, the urine is not going into the into this system. Urine is gonna, go down the drain and only the solids through through our system, the toilet system. The separating toilets is which I'll talk more about later, because I'll probably report on that later, because that's another install that will we're gonna do in the next week or two but yeah. Just the solids go in here kitchen scraps.

A

If you want to feed it extra stuff say we mow the lawn, let's say, and we want to stick more food for the bacteria. Here we can flush either sawdust or straw down the toilet. We can use the macerating pump in the sink to feed extra grass or something we'll see how that looks in practice.

A

I mean the easiest thing would be to put some kind of a little chute here, where you're just loading this with extra grass or something that's a little bit hard, because if we do that, I mean you could do some pipe in going out the side and directly into this digester. However, that would add another hole through the well there'll, be just another hole, I'm, not sure how necessary it is if it's all loading through the kitchen sink and a toilet, so we're keeping it pretty much automated fully. So this can work.

A

So that's that's my report on this and any questions from anybody, because that's I think that's an important part of the cdk home yeah.

C

A

C

A

C

A

I think what we're gonna do first is fill these things up with with water a hundred percent, because of exactly what you said so I think when we start this up, we're gonna get this all filled up with water. Now, how do you do that? There's a drain here? This is uh this is a this actually is threaded, so we can actually put a maybe like a hose connection here, so this plug can come out and we can load it with what we'll actually yeah. We can load it with water.

A

So keep this valve closed, open up the bottom, this bottom valve here and then put a hose, which we actually have a hose in a utility room and fill that with water or you can just you know, run the sink all day and just fill it up. But that's that's one cubic meter, 275 gallons at two cents, a gallon. You know that's like five bucks of water that you have to waste at first to fill this all up with yeah.

C

A

Yeah, well, that's exactly the purpose of the overflow, so the overflow is here this pipe here right. So when you fool when when this fills, and then you have another injection of solids and liquids from the the pumping action from that mass raters waters, gonna come out of this pipe just simply by overflow, yep and then down to the drain. So this is, this is all all hands off once this gets going, I mean that's the that's a trick.

A

This is based essentially on the it's called the solar cities, bio digester, but they're they do manual, loading and manual maintenance manual emptying of the effluent here. This is all install it and it's like an appliance. It's like a big refrigerator. It just process makes gas. Is that then it's answer question? Can we move on.

C

A

Let's move right on here.

A

Next item, so I was gonna, bring up roadmap a little bit of comments on roadmap, which I which click on it and you'll get to this page right here. This is crazy plan for this year and, of course, there's more here than we can do.

A

I just want to get everybody on a bit on the same page of kind of what the thoughts are, but I think that the main thoughts on this year is that we're getting back to the housing in a serious way, in a sense that on here's, there's a lot of content here. But let me just try to point out some main features so the main features- maybe you can see on the right hand, side here: seed home workshop factory farm, we're looking at a seed home workshop in Utah and.

A

If we can find a location in the south somewhere where it's warm early, December aquaponics build, because when we think about it, the house has been the most popular in aquaponics is most popular popular there's. Also, a good revenue generation opportunity there. A lot of people sign up for those workshops, but definitely housing is in huge demand. It's a you know it's a trillion dollar market, so serious stuff. The digester is part of that. But that's that's the that's.

A

The big big builds coming up under this year to get there we're so katerina is working on. Where is that thing house design training that thing right there house design? That's that's in progress like literally we're documenting everything we know on the seed, eco, home and Katarina's publishing. All that all the details of how you do you run a workshop. How do you do all the design? How do you do the the codes and all the regulations?

A

That's in progress, and that is sounds like the deadline for that is mid-june for that publication, after which point we can actually start training people on the whole process. That's in progress! One part of that is also, if you look at arc kit, AR c ki t com, that's what we want to do, it's a kit for producing models of housing and it's 3d printable. So that's that kind of gets us to the 3d printer part here. But our kit is look at these things. I mean these are models them made out of little.

A

It's like Legos for building houses, but the cool part is. We can do exactly this for the CD Coahoma net. We actually talked about it already. In fact, it's one of the Kickstarter rewards that we have to deliver. So what we need to do is deliver one of these kits for the CD Cajon building methodology- and this is I- was quite surprised to see that I was looking at business models for 3d printing yesterday and I ran into art kit, which is it's all these little plastic pieces, but that could be 3d printed.

A

So that is a really good idea. What you want to get on top of that and do these equivalent modules for the CD go home, because that's exactly what we do. We have these panelized modules for the CD Cajon and we can do our model designs with it. So, for example, when we have a client we could send them a 3d printed kit and they could design our own house and we can build it. So it's it's the level where, like this, so what's the distinction here, this here is not designed for build.

A

This is just the generalized model and you can build all kinds of models with this. It's just a generalized model which does not consider the actual building technique. We are way above that with sadhika home, because not only can we design it's like you know you look at our Kickstarter modular building panels. We can design a 3d printed kit that corresponds exactly to the modules that we are building. So what you're, using in a kit is the actual scale down build.

A

Unlike this, which is, this is really conceptual you're not gonna, build your modules like they have this design and in this kit it's so called fake. Ours will be much more close to reality for when we can do with that. So that's that's one thing to think about in our integrated product line, for what we do so 3d, printing, so 3d printing is a I. Have the 3d printing thread right here, but it is one of the the big things we're working on and no joke. That's it's big big stuff!

A

So a Thunderhead filament maker, that's progressing! That's I talked to emailed with with Matt. Yesterday he's really on top of it he's getting a CAD he's doing it all in SolidWorks, but he's gonna export it, but he's documenting it. That's good! We want to stabilize a minimum viewable product of D 3d with a 12-inch print bed. So it's a nice powerful model for the workshop and as I mentioned, I I really want to explore fully like. Does the PVC pipe get us to accuracy?

A

If it does, let's roll with it, it's a simple way to do it. Okay, large extruder, not extruder nozzle. We haven't done that yet, but for a larger prints, as we scale up all the 3d printers now we're working on a preusse extruder, that's important, and this is why I mentioned the d30 PVC full design. Kit 12 inches in 8 inches. That's really embodied in a 12 inch d, 3d minimum vehicle here right there.

A

So after that, let's start getting back into workshops Eugene, so Eugene is where Matt no Eugene is actually the I'm going to conferences. There's a conference there I got invited to speak there on June 20th, which is a conference on sustainability and communications, media and stuff. So they invited me but I'm.

A

Looking at running a workshop then, which would be June I, want to continue here, I'd like to see if we can do a workshop with Matt Rogi on a filament maker he's in Seattle, so maybe a workshop in Seattle and then further August just continue that month by month and lead up to after we prove that that works and we've seen it. People show up. We we make money on that people walk out with 3d printers. It's all good.

A

We got to refine the product and make everything better I'm, looking at September a four-week immersion program at factory farm for 3d, printing, and by that time it would be good if we had some products along with that. Like simple 3d prints- let's, let's zoom in on that, so what are?

A

What are some of the products that are derivative from a 3d printer?

A

Well, it happens that the tech portrayed people are actually working on a flexure microscope of 3d printed microscope with, like a USB camera, cheap 3d printed microscope, which is quite relevant to the CD, go home and a quote on a green house and that we can do water measurements and solve foodweb measurements ie. Looking at the microbes, what microbes you got in the water for water, quality testing or soil for a soft food web?

A

That's their 3d printable camera PI, cam, 3d, printable, 3d, printed, cordless drill, the cdk home kid, the arc kit that I just mentioned 3d printed drone, filament extruder, laser small laser head addition like a little little few watt, laser Python.

A

These are all things I would use these I stand for these I would I would love to make these things. As you know, take a look at a phone or camera. You build it. You got it for life, you can change! You don't have to throw out your phone every year or two it becomes lifetime design with PI Raspberry Pi pi, zero $5 for pi zero make a make a phone or camera. On top of that, the microscope actually works with a could work with Raspberry, Pi or yeah.

A

It actually does work with Pi, cam or or I think even Arduino. What else design guide? If we do the 3d printer, we want to create a design guide, which means that we're teaching people how to design all kinds of 3d printers from our model kit from our construction set with that ruslan I mean I'd like to talk to you about. If we could maybe transition like once, you got the pipe library start on undoing the 3d printer workbench, as in you can do a frame for a 3d printer with a PVC.

A

So a design guide and a a construction set within free cat. So I didn't write that down, but construction set in freaking. We started that Steven started that he's got. We've got some of the icons for the the parts of a 3d printer for the workbench, but freecad workbench d. 3D, workbench, okay and what else website, if you do an enterprise doing this, we got to have a website. I want to make a template that anyone can use to start their own websites, start their own business and so forth. So that's!

A

That's that and continue I mean if we can continue and just continue doing the workshops we got to make money. I mean the bottom line. Is it's like? How do we support a project? People got to make livelihood off it, that's how we can grow. So that's the model. Okay, CNC torch! That's a big one! That's it's! The thread hereafter right after the 3d printing I'm I'm gonna get in the workshop like this Thursday I'm gonna start working on a torch start shaking it down.

A

I'm gonna, look at adding bigger motors and bigger bigger belt to it, because it's just underpowered right now and add the height control, and then we can talk about cutting out all the parts for tractors, micro tractors, power, cubes, CB presses, which were the CB press. The idea is, the workshop in Utah is gonna, be c. Cb press built the idea there is they actually bought. One of our brick presses out there and we're gonna well they're gonna, press 6,000 bricks for that and we're gonna build that thing.

A

The first scenic of home workshop here is gonna, be that's going to be frame construction and at in October, just to show two ways: cuz a lot of people are gonna, have access to the brick press and that that way we can it's hard.

A

It's hard work I mean a lot of work for the brick press, but we can rent brick presses to to any clients that want to do it, but assuming that not a lot of people are gonna have access or willingness to do, çb we're doing both frame construction and CB as two models that we'll deploy.

A

But that's where this, the CNC torch table for making more buttons more brick presses, is very useful and I'm putting all these builds out until whenever we get this CNC torch table built because I think that's too important, I'm also working on a book book, I'm everyday I'm spending, four hours, publishing, stuff and kind of really getting everything together to really focus on.

A

What's the meaning of all the product product Ecology's that we're doing the crazy crazy integrations like the cdk home and whole energy infrastructures, fabrication infrastructures, that's all got to come together, and it's really good actually for me because, because bring it together, all the knowledge we've gained over the years is good and- and that really needs to be communicated for this movement, to to go forward. Okay on the CD go home once again.

A

Here's it's kind of that thread is a bunch of details there, but we're actually gonna do a an aquaponics workshop using the existing workshop, we're going to automate the one the house I'm in right now. This is the like. We call it the micro house that has its own aquaponic greenhouse and we're gonna.

A

Do a workshop in which we go through all the all the fish and plants and chickens and worms and mushrooms, but also we're going to add the automation component, automation for the towers for the work for the growing beds, we're gonna add duck weed in Azolla troughs which are automated so basically put making all these things such that there are turnkey like like you. Just you know, harvest go in there and harvest I'm.

A

Also, looking at adapting the farm bot, which has got a planter, it's got a little cedar head on a CNC axis to do the seating in a tray before we move the plants out to the to the towers so really focused on the automation aspect, which means that you don't spend a lot of time in there like right now. What I'm doing is I'm harvesting, like a few vegetables like like kale and and mint all the tomatoes died off actually, by the way it was too cold.

A

Here all the tropicals died off here and then the chickens I get chicken eggs here. So that's that's that I don't spend any time in there. It's it's like five minutes in there a day, but right now, I haven't replanted, all the crops and that's a part. That's you have to be regular about. You have to do like 15 a day if there's like a thousand growing spots in the towers which is out of we got 46 towers in there thousand plants.

A

That means about 30 plants a day for a 30 day, harvest cycle, so we'd have to plant 30 plants a day that could be done in say, five minutes. If we have the automated planter the cedar and also a crazy idea, there is drones with computer vision that plant seeds into the towers directly I mean that's crazy but and that's totally doable. Someone just would have to integrate drone technology and computer vision. To make that happen, I mean it's very sexy and exotic.

A

It's a little high-tech but absolutely doable just dropping a little seed bomb into one of the growing tower spots, which would have a little pot in it. So not too not too far out a little little actuator that drops the seed. Otherwise, the drone is just takes off and picks up. Another seed or whatever, and then a docks and it's recharged, and then it does the same thing again next day.

A

So literally literally like a bee flying in there anyway, aquaponics workshop, that's gonna be June, beginning of June PV workshop, we're gonna install PV, just like we do on it. So we're very happy with this. The the CD go home previous PV system. Three kilowatt system, which is all working pretty nicely I mean it's a little bit of a cheat because right now we're using some backup charging for it, because we don't have the load management happening properly. Yeah, there's little refinements, definitely we're suffering from a very, very small battery bank.

A

It's about a kilowatt hour battery bank which, with all the loads right now like running a stove at that, takes a fan it just we just don't have enough energy, so we've got a little trickle charge back up power line going to that that house, but yeah we're gonna, do a PV workshop based on that three thousand dollars for a three kilowatt system. If you buy one off the shelf, it's I looked at prices for a kit kits are about eight thousand dollars without racking.

A

Our system includes racking, and if you want to fully install systems, those are thirty. Thirteen thousand I just looked at some of those numbers. You can look up open source PV system on the wiki, but we can do it for three thousand and materials with a really low battery bank, but you can get the nickel-iron. Batteries are in the GBCs and they they're a little expensive but they're they're. The way to go I mean for I. Looked at some of those. Yesterday they one company claims sixty two year lifetime.

A

They say like 25 thousand discharge cycles at 50 percent depth of discharge. That's like 60 years for the nickel-iron batteries. Yeah, it's crazy! It's! But it's it's! It's apparently real I looked at prices $190, but basically 200 bucks from China per battery and each battery has a half a kilowatt. So for two thousand dollars you can get like five kilowatt hours, but that means like real five kilowatt hours, not like 20% depth of discharge or something that like, if you look at their specs they're, actually go to like a hundred ten percent depth of discharge.

A

If you discharge them very slowly and stuff like that, so anyway, that's that's the deal here. So I won't go into more detail, but basically the so-so seen home is big. 3D printers are big. There's all these products around the 3d printer that we want to get to, but really talk about some first viewable business models that people can replicate. Alright,.

C

A

I'll leave it at that. Any questions on this.

A

Absolutely great so next next item here so template I just wanted to mention one thing about templates on the wiki which is important for us. So we talked about the development template that we have on a page that is called template. It's just go to page name, template on the wiki, it's just type in template and we have our spreadsheet template, which is got all these items.

A

That's great and and with Lex Lex did burn down from it, which we're not really using, but I really want to start using that I am using it in some place, but we do have a burn down template that takes the last column here, which is completion 1 through 10 sums it up and plots it as a function of time that that capacity exists.

A

We can use it so this is it the simple template we're using and recommending, but looking at the wiki actually there's another way to do it, and that's that's been done on the wiki in some places like, for example, if you go to, let me demonstrate it and actually I recommend you do that too, so go to.

A

If you go to template, I want to explain it because this is actually very important. There's a template which is template, colon GBCs header, on the wiki right, and we use this in since 2012, but we couldn't figure out how to use it once we once new versions come about, because then the wiki became a mess. What idea there is, if you look at template, GBCs header, what it does is go into edit of that to see the source code of it. It's activated by by doing tool, template tool named base page name.

A

So basically this template seeds an entire set of wiki pages that have the name of the page that you name it. Okay, let's explain this. So, let's, let's look at tool template, because this template involves another template, so this is kind of why I could never get this. Some way didn't really occur to me how how useful this could be. So, let's go to template.

A

Gbcs wait. What was that now? It's called tool template template.

A

Tool, template and then click Edit on that and the actual template is this here. It's this thing right there and other stuff is comments, but what it does is by calling you call the template by simply calling GVCS header like double the squigglies GBCs header, and it does this. It creates this thing like: okay, let's it creates this header with all these things that are already hyperlinked with the proper name. So let me give you an example.

A

So if we go to, you know sample whatever start a wiki page and and use that template SMA, I just call that page SMA or whatever. Okay, so I invoke that template by by doing GBCs header.

A

Is that correct.

A

Now what happens.

A

Look at that, so what it did here, just by typing in a GBCs header- that's like this saves us like if we actually develop this template to have more more useful links, but look at this when you click on, for example, research and development. Where does it take you? This page is called SMA go to research and development.

A

It creates SMA research and development; in other words, it automatically seeds the pages with the correct title. So this is a good way to to set up new wiki pages for new projects. I just want to bring this up, because this is this is pretty cool.

A

So, basically what happens is I started a new page automatically using this template, so imagine that we put all of our development assets into this kind of template and make it actually look good and you know, have a picture in there, which you can also call from by using a reference to an existing picture or something this could be very useful. Just just thinking about it. The only disadvantage is there is no burndown capacity to do with this, like, for example, people fill out this.

A

How do you get a burn down out of this with a with a spreadsheet that we did before? You could just look at the last column and you can type in the number of completion and then you can generate a burn down from that here. I think the burn down would still be doable would be some kind of a script within the wiki wiki markup like I, don't know how to do that, but Lex. Maybe you could figure that out, but I know someone could figure it out.

A

This is like wiki territory, wiki language territory, wiki markup language, but imagine that we we were able to do this and it would automatically generate a burndown graph just by you starting a page, and it would look at basically parse all the content to see how much of it it's filled. You know so just a thought, but I just want to let everybody know that, because that could this could be very important and and I do want to use more, have more templates throughout okay. So that's that's pretty much it on my side.

A

Let's go into the further stuff. Any questions on that and by the way, questions if you do have questions, questions and comments, there's page nine of the working document. You can interrupt me if not I'm, going to continue here. We actually do have to go. We have another meeting at 3:00 p.m. with some other people: okay, adapted Prusa, i3, mk2, extruder d, 3d cad, alright Roberto. You wanna update us on how far you got on that.

D

Sensor holders.

A

What is the issue there? Sorry, so this looks this is awesome, so we basically adapted. Let me see what you did there, so you took the how'd, you connect the extruder. Did you put a like how'd, you do it? You put a mount on the extra the.

D

A

That enterprise interface comes off. It's it's or is it part of the actual extruder.

A

The the orange pieces they're all one 3d printed piece or two, two 3d printed pieces like multiple pieces.

D

The cover di blur art.

A

Okay- let's see so how are you doing the.

A

Bearing idler screws heatsink, okay, so now you got the interface okay, so that interface I'm, seeing it that's it. That's what it is in screws in like this yeah.

D

A

Using existing bolt holes and that actually works.

A

So basically, you lengthen those bolts and then added one.

A

Yeah, let's see that's the UH does, that makes sense. Oh wow! So, oh so this this motor mounts on the back of the it goes into the motor yeah.

A

A

That sounds good to me. That looks like it works, and so he had a little screw right. There, no problem there you're thinking mm-hmm.

A

So if we hide that behind that Wow and there's a little nut catcher in there that you made yeah nice well, that looks really good. So so, for example, like that nut catch her there, you just created it by sketch, underneath that.

A

Nice and and you built off cedric's, which was already in proper three cat format, right yeah, yeah,.

D

A

So he did a pretty epic job in terms of he converted I think he redrew everything from the SDL to free cat format, which is good.

B

A

Yeah, so that's this is great I think we can roll with this. What do we do now? What do we do? How do we build it? Roberto? Can you prototype this? We need parts.

D

D

A

Yeah, let's, let's do that and what I like to do? Maybe can we talk? Maybe, tomorrow we can discuss how to go about the strategy for getting you all the parts and all of that to do this. I think this is very important. We want to do this as soon as we can. We want to test the 8 millimeter sensor and do that as soon as we can, so we can shake this down and really make it work. Are you available tomorrow, like I'll email, you about that? Would you be available, like 6:00 p.m.

A

tomorrow, CST.

D

A

Try that tomorrow no this is good. This is so. It looks like see any questions here. I know, I looked at the parts before and they were and I didn't see any problems before. As far as getting all the parts there's a few dollars- and you know we have the stepper motor rest is 3d printed and then the question would come to let's maybe transition right to John. Can we put the filament sensor that you're working on right right on top of this? Why don't you take off from here yeah.

B

B

Marlin firmware it comes with that feature built a film in sensing and I just uses a basic un. Stop it normally normally.

C

B

The filaments present sensor and when the filament exits the sensor the limit switch, opens and now we that just triggers a macro, g-code macro, if it, the Bartlett, firmware. Okay,.

C

B

Does the ejection so yes they're right there, it's just the one line in the header file for the firmware: okay, okay, once that's in comedy, you know, I just run that script, which.

B

That moves that it moves it out of the way who's printed out of the way, a jettison filament out of the top many remaining filament than they you'll, be in the extruders and see how this detective, the Rope rot out and it waits for new filament to be inserted. So the DePauw part I'm still checking out.

B

What this is seeing, what what exactly user confirming means? How do you want your place to fill and how you, how does a printer know, you're dying, yeah.

A

That yeah is there just a dialog that pops up saying trends like like there's this there's a pause and print button, so basically icon top of the interface you have you just hit print again, I think that should be it, but just for everyone else's reference here, this filmin run out sensors for like say you print a big print and your filament ran out and you totally lose the print because you know you printer kept going. This prevents that from happening, and that's pretty important so we'll see how we can fit this on.

A

That sounds good, see what you can find out more about that. But now how would we integrate that? If we just say use the proofs extruder? Can we? How do we do.

B

Yeah tiny little, you can mount this device wherever, so you may be on the side of the printer just out just pass wherever you are just.

B

Really anywhere, that's convenient, oh well,.

A

Cuz I was thinking that you've mounted right on top of the extruder, but that's that's not needed. Just keep the extruder clean.

B

For the case of ours are PVC or the cube brain, so maybe I'm not to failure. Where would the yeah.

B

A

I mean just what I was doing is I hung to verticals above from the top top members of the frame, and so just above it so above it. So it's clear from any tangle tangle mint would be above the the cable guides, so it's not interfering with cable guides, so just from the top. So it's actually with that said it's kind of there's not a convenient place to mount it outside of her actually right on an extruder.

B

You know rerender this in CAD and create a new model, but effectively whatever those verticals are I design. New.

A

B

Holes for this, so I can mount it directly on those birds.

A

B

Yeah yeah, yes,.

A

Sometimes, that's it's a little tricky in a sense that if the especially one then yeah I mean we'll have to we'll have to see what have to think about a little bit.

B

A

There's a couple of things to work out, but okay. Well, that sounds good. So at least that looks good and yeah see if you can find out just the last step, making sure we know how to do it fully and you should probably like yeah. Yes,.

B

So this week, actually, tomorrow I'm getting a Gramps, and you know it's ASAP this week, either tomorrow or Thursday, I'm gonna try this code out and see what happens. Okay by running it and you'll. That's other thing: this is this thing electrically interfaces. It's really easy at electrical interfaces through servo pin 3. So if you're, not using this, you just jump silver of pin 3, but you.

C

Guys, just repeat.

B

The firmware gonna tell people to jump back and for me whether my printer works or not I can still test this. There's me nice, nice effort. So let me move around yep so.

A

B

That do that with Keira week.

A

Excellent do that with Chiara, so we're on the same page mm-hmm. That sounds good, excellent, yep! Ok, let's move on here so.

A

Roman sensor, what else so d3d, austria any reports anymore, so d3, australia or no truck man said he can't make it here today, but looks like he's working a lot of different issues out he's just doing little refinements and everything.

A

Okay, let's move on from there hey Benny thing you on power, cubes.

E

I think they should be arms actually yeah professionally.

A

Speaking yeah professionally speaking, they should be Barb's that are three I, think what are we using their one inch or 3/4 suction? It's one inch right.

E

Links to one inch, barbs yeah.

E

A

Inch sounds good to me just to be safe.

E

E

The three-quarter part: do we draw that the filter and I guess the rest of the returns which there yeah.

A

And one comment on the suction: what what also works is so we've done both the professional fittings which are threaded and then they have a barb on the other end. But, interestingly, if you take three-quarter inch metal pipe, it has just the right diameter to fit inside a one-inch suction hose so we've you we've also used that and for that you know it's like 20 cents, as opposed to like whatever $4 or $5 for one of those Barb's.

A

So we can also do playing 3/4 pipe as as the as that, when in fact we did that, because when we got all the parts there they didn't have the barb in stock. So we just said whoops what do we do and we found that the 3/4 pipe actually works really well on that and it's very tight, so you just put a hose clamp on it and it works and that's welded into the the tank prior to.

E

Whatever you look up, the charts.

E

A

E

A

You want a actual detailed picture. If you go to mcmaster-carr, you can download, they have a lot of fittings on mcmaster-carr and they have step files. So you can take a look at download theirs and that's how I did the bio, digester I downloaded a lot of parts for the bio digester from like the actual some of those fittings I just downloaded them from as steps and then converted them to free CAD format.

E

Some of that was parked out there, so one of the next things I was thinking about, because we were talking about. Let's see the frame a little bit last week, figured I was mostly done with the frame but I'm thinking about how the sides never they'll be cut out. The.

A

E

This is gonna stack, yeah, the machine so far, you've stacked some other keeps, but that was a different design and I'm thinking that the top of these I'm gonna have to actually design a top side.

E

So I think I'm the big one I assume that the large main cube will go underneath the smaller once you'd be able to stack on that fine. But it's trying to figure out what the ideal way is to kind of stack. These multis together, cuz I was just gonna. They're gonna need to be fastened together. Somehow yeah.

E

For anything so.

E

A

E

It'd be something easy. Just a few small bolts right, yeah.

A

We've done that the micro track we just put a bolt through the bottom of these cubes and attached it to the frame of the main frame of the micro track. Now here like if we use the big tractor and there's so many of these unarmed, maybe like even just a rail, some kind of a mounting rail for the power cubes, where they all just slide in there like on a maybe like a 2 by 2 angle, 2 by 2 by 1/4 angle that they kind of slide in one after another.

A

But the other comment we have to consider is that you don't want the the the mother power cube to be on the bottom. Actually, because if the the there's gonna be suction issues at times, if you have any any air leak, then you're not gonna, be sucking. Fluid and you're gonna be running a dry pump. So you want to put the actual the mother power cube on top, so that by gravity the fluid will always get to the lower pumps.

E

You able to pull together, okay, that way, I think yeah.

B

E

Five of them so on there it was a little complicated, there's a lot of hosing to run there. It, let's see.

E

It's not real, you say you go with hose clamps for most parts of it, but there's quick, disconnects I guess at certain points to make it a little easier. So yeah.

E

A

Quick coupler is, for example, on a pump.

A

Yeah I mean whenever practically like, for example, you're gonna be connecting different things to the power cube. It's practical for the power cube itself. The outlet of that to be a quick connect since you're gonna be connecting different things to it, so that there is a quick connect half-inch on the outlet of the other pump.

A

It's pretty much it that's as far as all we need for well also for the returns. Quick connects for the returns, so you can connect different amounts of different implements to this different yeah.

A

As far as the suction, that's a bit tricky because the suction, when you connecting other power cubes to it, there is no. This is one of those issues. There is no open, Quick, Connect coupler, that's free-flowing under no pressure like for a suction line. They'll make those. So there you have to make a solid connection to the suctions you can make like you can put on a big big coupler. But but the point is that those things have a lot of pressure. They have a little spring in them, so they don't.

A

They put too much pressure against the suction. So that's one of those things that makes the power cube hard is that on the suction line, there is no way to make an easy connect.

A

What we've done before is use a valve, and then you shut off the valve to make a connection, but now that you have a basically a valve and a barb, but there's no other way that we know if this is where, like some custom, 3d, printing or machining would actually do the job we might have to design our own couplers. There are free-flowing, but also self sealing.

A

There are I mean there are self sealing couplers, but they're not really free flowing under like low pressure. They have too much resistance. Typically, it's one. It's one of those things. It's a detail.

A

But I think that we're it's workable to do a shutoff valve as well as and just barb connection to them, because if you don't have a shot off all the fluid.

E

Distance there's gonna change, whew, okay,.

E

Well, actually, there's a few inches I could short the entire cube a few inches, because that's what keeps the cube size, larger distance from the front of the engine to the back of the palm? Obviously, some of the stuff still needs to be adjusted.

E

For the total size, I guess but yep.

A

E

All are yet that's.

A

Good yeah, just an optimization on that yeah, let's see how it works, I mean I, definitely want to build a big tractor once we get all this and get this really refined. So that's important. Okay. We got to get going, though, because we've got another meeting, just quick, quick ruslan. Do you have any updates on the on the pipe work, real, quick, any issues to brab.

C

A

Did you get to the bushings.

A

Excellent yeah I mean the the comment here is, if you guys look at slide number three with a digester. A lot of those parts are from our new macros care of Rousillon here. So it's awesome I mean it's really nice and convenient to have like whenever you need a pipe or a fitting to just download it just get it right from the workbench as opposed to trying to download it from mcmaster-carr. So that's that's.

A

Working really well and I'm, really glad of how that's doing because then we can do all kinds of plumbing everything using that workbench I'll get you some more comments on what what we could I'll take a look at what you have and see where we go and comment on that, but yeah, that's really really good I mean I. My thing would be I would just say: hey get to the PVC frame using the corners like we don't have the corner pieces, though right.

C

A

C

C

That's right: that's.

A

C

A

I, don't that's, there's I, know they're custom I, don't think, there's any dimensions that we can pull off like. We just have to make it up which say: okay, this will just make up those dimensions and make it look good, but we know that they have to fit around normal pipes. So that's that's what we do know beyond that. We can feel free to make them look as close to the real thing as possible.

C

C

A

Okay, everybody hey let's, let's close this meeting off, we've got another meeting coming up here, but thanks a lot, everybody and good work and all the stuff we're making some progress and we'll talk. Anyone who wants to stay for the next meeting we're talking with. What's it called libery? How do you say it libery can't hear you.

D

A

Call it library- and it's got four letters- that's our excellent okay.

D

B

A

Excellent excellent, so we're talking with library people about collaboration, so they have a new protocol for reinventing the internet. Tell us more about how we can benefit from it like a mention about YouTube videos as a star but yeah. Let's, let's start the discussion.

C

A

Hold on, let me let me just.