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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: Stepper Motor Driver Redesign (V3.0?) - 16 years ago
Well about single driver boards, if you buy them from MakerBot they are often out of stock, because people always have to buy 3, hence the suggestion of 3 on 1 board. I forgot to reply earlier about the 2 on 1 board, good thing I didn't, as I have a good point for the spare driver, that being that it gets used on the auto head changer when one is designed for Mendel. Its my opinion that such aby Grogyan - Controllers
Re: Motor electrical noise? Seriously...? - 16 years ago
General rule of thumb when using brushed dc motors is that you solder 100nf (or smaller) across the terminals and from each terminal to the chassis of the motorby Grogyan - Controllers
Re: conductive adhesives? - 16 years ago
I've used a conductive adhesive, which is basically a RTV with loads of silver in it, it has very low resistance and is quite expensive. Certainly not a suitable glue for which you can solder after. Loctite do sell a conductive epoxy laced with silver, I dunno how easy it is to solder to, but your welcome to tryby Grogyan - Plastic Extruder Working Group
Re: economics, bespoke vs mass production - 16 years ago
RepRap as I see it, stands along side mass production, for one a RepRap can't print metals, nor anything requiring a smooth finish on all sides, you are also size dependent. I'm building mine because I don't want to keep asking people for their tools for any projects I do, or in need of something, usually for my robot projects.by Grogyan - General
Extruder Bits - 16 years ago
Just visited a CNC machinist today, gave them some drawings for extruder parts to get a price quote, I did submit the drawings to another company, Swages, their quoted prices were quite high for the nozzles, and fair for the barrel and thermal barrier. Just got to send out the drawings to another place for another set of quotes. After I got the quote from Swages, the quotes for the nozzles wereby Grogyan - New Zealand RepRap User Group
Re: Loose mechanical bits n bobs - 16 years ago
So far the best place I have found is MicoMetals, i've never used them but they seem to have mostly everything, after I read their fastenings catalog they state they have M5 x 50 cap head bolts, I think Vik must use them for getting the 8mm SS rod, and maybe the threaded rod too.by Grogyan - New Zealand RepRap User Group
Re: Stepper Motor Driver Redesign (V3.0?) - 16 years ago
That would be pointless, if you plan on doing experimentation then you just get an individual board. Also the extruder board supports a stepper so that would be the 4th driverby Grogyan - Controllers
Re: Stepper Motor Driver Redesign (V3.0?) - 16 years ago
Leave it at as a separate board, as having one board do most stuff would be very expensive for the casual user how just maybe wants a second 3 axis board. As for my recommendation to use 0805 over 0603 still stands. Through hole vias is definitely one way to go, but its not a good idea, as the user will need a very chunk soldering iron to heat up such a large ground plane, though as a solutionby Grogyan - Controllers
Re: Powder as Support Material - 16 years ago
Its also useless for this type of replication that the RepRap use. We would have to come up with a formula that can be easily dissolved and some physical strengthby Grogyan - General
Re: Laser printer parts - project ideas? - 16 years ago
Yeah, my 5 cents worth. I'm building a repstrap using two old flatbed scanners, and custom designing the z axis. Both driver boards in the scanners were found to be not worth the hassle to write custom code for, and wiring, so i'm just using reprap driver boards instead. Both scanners have a single opto switch for finding home with. I've mostly finished the frame which is wood. I'll be postingby Grogyan - General
Re: From Blender to Ponoko - 16 years ago
I tried FreeSteel again and it still does not open with InkScape, the document is empty. When I open the same svg file in FireFox a picture is shown, though all the edges are smooth and sharp corners are rounded. Skeinforge outputs the same design properlyby Grogyan - RepRap Host
Re: Pick and Place toolhead, STL files included! - 16 years ago
A real Pick and Place machine, grabs parts from a known orientation, and knows how many parts there are in the notches of the tape. For example, if you got a MakerBot V2.3 driver board or !.2 Mobo, and noticed the holes next to the part in the tape, that is what is used for Pick and place machines. An encoder in the head servo orientates the part before placing it onto the board, therefore it aby Grogyan - Pick-and-Place Electronic Assembly (and robots!)
Re: Stepper Motor Driver Redesign (V3.0?) - 16 years ago
Hey Protonite, I've just got back from a wedding over the weekend so this is the first chance i've had to read through this and the other thread. I agree with you totally that the addition of a 5V regulating circuit, when just using the 5V output of the ATX is sufficient, well there goes the two honking big electrolytics. I don't see a purpose to having tantalums, cause from where I see it, theby Grogyan - Controllers
Re: What type of threaded rod and nuts? (Quality, finish) - 16 years ago
Here is a tip, that I can tell you from my work place, its better to go for stainless steel than zinc plated or galvanized, as when the parts are worked in, plated, and galv will jam and cause an absolute nightmare, where affordable, go stainless. Aluminium, is also not a good idea, as it oxidises quickly, and may cause problems, least of which is trying to support a weight, aluminium rod will bby Grogyan - Mechanics
Re: From Blender to Ponoko - 16 years ago
Thanks Enrique, I noticed that changing the extrusion width didn't change much, just as you said it would. I did find that if I do try and use the layer thickness to be the whole thickness of the part, more often then not, Skeinforge would muck it up, but if I make the layer, say 2mm, it would work perfectlyby Grogyan - RepRap Host
Re: Mendel target date - 16 years ago
Forrest Higgs Wrote: ------------------------------------------------------- > lcomtois Wrote: > -------------------------------------------------- > ----- > > If you want to build a Reprap you should build > the > > current model. When the next one will be > available > > you can then upgrade by printing the next > design. > > Yup... Or if your insanby Grogyan - General
Re: Motherboard 1.1/1.2 - 16 years ago
I hand soldered all my boards no problem, as the parts are so big.by Grogyan - Controllers
Re: Mendel target date - 16 years ago
Some parts are partly ready on SVN. There is more coming I think. No instructions on how to build one yetby Grogyan - General
Re: Google Sketchup Model of a RepRap? - 16 years ago
eDrawings file You'll need the free eDrawings to view VRML viewer neededby Grogyan - General
Re: Electronics that would pass european conformity tests? - 16 years ago
First things first, to remember that a stepper motor doesn't have brushes, therefore little to no noise, other than energizing the coils inside the motors. Second part is, the Gen3 driver board, the chip has inbuilt shoot through protection diodes. If you want to you can put 100nF caps over the windings, better yet, find what the resonant frequency will be and use a cap that matches that for eaby Grogyan - Controllers
Re: Alternatives to the toothed belt - 16 years ago
I still go back to my suggestion of maybe designing a chain which can be prited, then use Polycapratone to make the gears Found one suggestion on Thingiverseby Grogyan - Mechanics
Re: From Blender to Ponoko - 16 years ago
That gives a divide by zero error. Using an extrude width thickness ratio of 0.1 gives a line width of about 0.5mm, same as the tolerance for Ponokoby Grogyan - RepRap Host
Re: From Blender to Ponoko - 16 years ago
I did, weird that it is blank in InkScape. The way ts acting i'll use something that we know works, so far that tool has been Skeinforge Carve. Did some other playing around late last night, and I got Skeinforge Carve to do its thing properly on the mesh, Blender had mucked it up somehow, so I downloaded a more recent version from , and exported the mesh to stl, and it sliced properly.by Grogyan - RepRap Host
Re: From Blender to Ponoko - 16 years ago
I think FreeSteel is actually converting it to an image format, least that is what I have observed today, because when I open it with GIMP, GIMP says there is do dimensional data in fileby Grogyan - RepRap Host
Re: Looking for reprap in NYC - 16 years ago
Try asking Zach Smith at MakerBot, i'm sure they can make parts for you with their cupcake.by Grogyan - For Sale
Re: From Blender to Ponoko - 16 years ago
The file seems to be empty, when opened in InkScape. When opened in GIMP the edges are not sharp Carve does work a lot better But it doesn't like this meshby Grogyan - RepRap Host
Re: Skeinforge Powwow - 16 years ago
That worked, kinda, using your suggestion Nophead It produced an SVG file, now I just gotta work out how to get it to just do one layer Cheersby Grogyan - Skeinforge
Re: Skeinforge Powwow - 16 years ago
I dunno if there is a bug with skeinforge, but it won't let me carve an stl to svg with unproven mesh enabled it looks like it is going File C:/Program Files/reprap/Skeinforge/MyZ_2.stl is being carved. The file C:/Program_Files/reprap/Skeinforge/MyZ_2_carve.svg can not be written to. The carved file is saved as C:/Program_Files/reprap/Skeinforge/MyZ_2_carve.svg Skeinforge was not able to openby Grogyan - Skeinforge
Re: Alternatives to the toothed belt - 16 years ago
BodgeIt Wrote: ------------------------------------------------------- > The method I like the best is the use of the > balled chain there is a 2mm pitch version of this > chain. > I also liked the cycle chain method May I suggest that people try and designing a sprocket and chain system that can be printed. Maybe using the same approach as Lego and have clip together chain sectionby Grogyan - Mechanics
Re: From Blender to Ponoko - 16 years ago
I tried several attempts, and I find its not working either. Then I found out that Carve in Skeinforge should also work, but I don't know if its a bug or what, it says its written the svg file, even though it hasn't. I have both python 2.5.2 and 2.6.2by Grogyan - RepRap Host