I am having trouble finding any info in the wiki... what is the size of the rod used in darwin? is it all 8mm? I'm just wondering because I think i'm going to buy some on mcmaster or somewhere and see what happens. =) ~Zach _______________________________________________ Developers mailing list Developers@reprap&by ZachHoeken - Developers
they give a great rate at a >$2,500 purchase. $0.12 / sq in. we have 54 sq in. of boards, so it would be $6.48 / for all boards. to meet their minimums, we'd have to buy 385.80 boards. i dont know if we need that volume just yet, but i could imagine that mendel might be a different story. =) ~Zach On 3/17/07, Adrian Bowyer wrote: > Excellent - do they do a quantity discount? > >by ZachHoeken - Developers
sunday night (3/18), i'm buying some prototype boards on . let me know if you'd like to get in on the order. keep in mind these are a bit pricey due to the one-off nature, but if you're itching to get started... this is your chance. keep in mind, if you can wait another month, you'll get all 6 boards for the price of one here. universal: $27 / ea powercomms: $15 / ea once these guys boards cby ZachHoeken - General
Woot! I uploaded our designs through the batchpcb website to test if it would work... there were a couple hiccups, but both passed with flying colors!! Here are the final sizes: PowerComms: 6^2 inches = $12 / ea prototype Universal Controller: 10.45^2 inches = $27.50 / ea prototype Both designs are in my svn folder under 'production.brd' ~Zach ______________________________________________by ZachHoeken - Developers
Status Update: We've finished the layouts on the Universal and PowerComms boards. I'm waiting until Sunday for last minute suggestions / mods and then i'll be submitting an order to a nice place that does group prototype pcb runs. I'm doing this to test the manufacturing process before I go and spend $1500 on a big buy. Apparently it takes 10-20 days max to get your boards back, so unfortunaby ZachHoeken - General
Awesome! I check it out, made the final routing links, fixed any DRC errors, and tidied it up. I think this board is ready to rock and roll. I figure I'll give it til Sunday night, for anyone to make / suggest changes and then I'll put in an order for prototype boards. The final design for the universal controller came out to be 10^2 inches. its 4" by 2.5". I think it looks pretty good. =)by ZachHoeken - Developers
Hey, just found this sweet new site: They are really rad and make it SOOO much easier to look up electronics parts online. If only I had known earlier. =)by ZachHoeken - General
that ones pretty simple... just pull the plug and the machine will grind to a halt. of course... you're welcome to make that as fancy as you want, with an actual button of some sort. i'm not familiar with the interface software, but it would be a good idea to add a 'pause/stop' feature to it when you're printing (if its not already there)by ZachHoeken - General
yo (simon/adrian), i spent a good chunk of time tonight tightening up the universal board. its nearly complete, i just have to bring in the rest of the connectors on the top, and then also put the darlingtons in. i figure it will be easiest to rotate them and put them on the left edge. the board dimensions are now 2.5" x 5" which should be a pretty good middle ground. i probably wont have tiby ZachHoeken - Developers
very nice. i'll try and upload those to flickr, then put the new images up on the wiki. as for the universal board... right now i'm trying to reduce the size of it small enough where we could get it manufactured easily. i'm basically just moving around components and smooshing everything closer together while maintaining the trace size. it looks like i'll be able to get the board to around 12by ZachHoeken - Developers
from adrian: Yup - that one should do. The design is pretty tolerant: any small bead-type thermistor with a room-temp resistance between 10K and 100K should be ok; Simon's written a capacitor calculator on the wiki (http://reprap.org/bin/view/Main/ExtruderIO) that tells you what capacitor value (C3) to use in the circuit for any reasonable thermistor. Best wishes Adrianby ZachHoeken - General
simon / adrian, would you confirm if the part number i gave in the forums is correct: if it is, i'll add it to the wiki for the extruder board. thanks, ~Zach _______________________________________________ Developers mailing list Developers@reprap.orgby ZachHoeken - Developers
interesting... it would be nice to get some definitive tests on different materials and how they stack up against each other in a few different categories: * adhesion of plastic * cost * re-usability (do you have to keep replacing foam boards?)by ZachHoeken - General
ah yes... i was referring to a double sided board. thank you.by ZachHoeken - General
agreed. i was definitely a bit overzealous in my approach to printing circuit boards with reprap. however, i think forrest does underestimate the importance. it is definitely 100% the priority of the project right now to get up and working a machine that prints objects in 3d with plastic well. that is the first step. that first step is huge, because once it is in the hands of developers arouby ZachHoeken - General
awesome! i should have the production size boards ready for you guys to look at tonight after i get off work. hopefully someone can find time to go over them and let me know if they're right or not... hopefully they will be. also, i had another question... on the pcb site, they said that their limits are 8mil on traces and spacing, what does that equate to in KiCad? i used a size of 25 for thby ZachHoeken - Developers
made a bunch of progress tonight on the boards. i was wondering about how on a manufactured board the via's are through plated. i was wondering if that meant that component holes are also through plated. for example, if in kicad a component is connected on the component side of the board, but you solder it onto the copper... will it be a good connection because the hole where the leg goes throuby ZachHoeken - Developers
good idea, i'll do that. i'm going to be doing a prototype board buy to test the manufactured boards. it may take up to a month to get those boards back, and then up to another month to get the final boards back. its looking like 1-2 months at the earliest before we can have the final, production boards available. if anyone would like to get in on the prototype boards (aka boards that may orby ZachHoeken - General
i'm not entirely 100% sure, but i think its fairly safe for a couple of reasons: 1. the 50v rating is just maximum voltage, the project itself uses 12v which is pretty safe. 2. when you power down the device, you can tell the capacitor drains, because the light stays on for a couple seconds then slowly fades out. you should be safe, although i wouldnt deliberately touch it just to be safe.by ZachHoeken - General
great. i'll try re-arranging the board tonight to try and squeeze everything onto a smaller board. since we are getting them manufactured, we can use kicads autorouter feature. that will make it a very simple task.... just place the components and route. we will still want things all to be soldered on the copper side, but thats fairly easy to do manually before/after the autoroute. On 3/13/0by ZachHoeken - Developers
great. i think we're on the same page, but there are a couple things to touch on: On 3/13/07, Adrian Bowyer wrote: > Zach - this is a really useful list. thanks. > People seem to be forgetting recently that I have been consistently saying that > our release date was going to be 2008. The reason I said that is because I was > sort of taking account of all below... > yes, butby ZachHoeken - Developers
so do you guys think its a good idea to test it from one supplier and then do a production run from the other supplier? its going to be pretty expensive to do a one-off prototype board from the suppliers we've looked at, but they would be very good for bulk runs. this new place on the other hand is perfect for one-offs but crappy for bulk boards. i know we definitely want to do bulk boards inby ZachHoeken - Developers
Hey all, The recent debates on the list spurred by the museum stuff got be a bit bummed so I didnt do much yesterday. It pains me to see infighting, however minor. That being said, lets look forward and aim toward fixing the mistakes of the past. I love this project and I think what you guys are doing here is amazing. This is something I want to share with the entire world. I dont give a cby ZachHoeken - Developers
just got this in an email... it would make sense to use these guys to get some prototype boards made up for testing, then to do a production run with one of the other guys once we know our gerber files are ready to rock. if we get our boards down to 9"^2 it would only be $22 / board. not a great deal, but pretty cheap for prototype boards for testing. we'd only need 3 boards: comms, stepper,by ZachHoeken - Developers
yup got it. On 3/8/07, Adrian Bowyer wrote: > Hi guys - we seem to be having a little trouble with this mailing list. Could > you reply to this on the list if you get it, with a cc to A.Bowyer@bath.ac.uk, > so I can try to see what's going on? > > Yours > > Adrian > > > > ___by ZachHoeken - Developers
sorry to bug you guys, but we've had a couple questions in the forums that it would be nice to get some definitive answers on: thermistors: java serial stuff: if someone who knows alot about these could help out, that would be wonderful. _______________________________________________ Developers mailing list Developers@repby ZachHoeken - Developers
I just got an email from the guy who runs dorkbot, and I told him I'm still interested in presenting. Hopefully I will have a functioning machine by then. It seems I will need to step it up. =) Even if I dont have a full reprap, I still would like to present. It would be ideal if we could get the boards by then and be ready to bring new people up to speed quickly. other than electronics, theby ZachHoeken - Developers
hey, i'm very excited about getting manufactured boards, especially since i've seen the type of prices we can get. i just want to get input from simon and adrian about the readiness of the boards... they're pretty solid / non changing on the design for v1.0, right? ideally i'd like to get enough boards for around 25 people which sounds like a good testing group setup. do i have a green lightby ZachHoeken - Developers
i dunno if my email got lost or not, but what do you guys thing about using molex power connectors (the ones that power your hard drive) as the connectors for the stepper motors. i think it would be a very elegant solution. since you would be converting a PC power supply in the first place, you would have 3+ connectors w/ pigtails that are looking for a use. simply splice those connectors ontoby ZachHoeken - Developers
hey, i added my version of the universal controller board to subversion under my user folder. i would love it if you guys could check it out and tell me if you see any glaring deficiencies. like i said in my last email, its the same as the previous board, except this one is a bit larger and i've tried to space the tracks out alot. hopefully this will make it easier to construct by hand. youby ZachHoeken - Developers