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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
J-Head wire and an XT60 connector? - 12 years ago
All, When wiring a j-head do you use high temperature wire running the full length from the board to the resistor in the head? It seems like it would be fine just using short lengths of high temp wire between the connector at the head and the resistor. From the connector back to the board I would think that 14 awg auto wire is sufficient. I'm thinking that XT60 connectors are appropriate forby Dorian - General
Re: really need some end stop holders - 12 years ago
That's awesome. I'll be there.by Dorian - Missouri, Saint Louis RepRap User Group
Re: really need some end stop holders - 12 years ago
No? Nobody?by Dorian - Missouri, Saint Louis RepRap User Group
really need some end stop holders - 12 years ago
What's up. Local to St Louis and my build is halted because I have no end stop holders for a prusa i3. I'd compensate anyone willing to print some up for me. Thanks in advanceby Dorian - Missouri, Saint Louis RepRap User Group
Re: Required motor power - 12 years ago
And now I have never seen anything in a nema 17 package that exceeds 76 oz/in.by Dorian - General
Re: Required motor power - 12 years ago
I think maybe you are getting some ideas confused. Power consumed does not necessarily equal mechanical output. Anyhoo... when people talk about the mechanical power of a stepper motor, which I think you are asking about, they talk about the holding torque. There is a certain upper end given that you are working within a small mechanical package (the nema 17). There is a page devoted to thisby Dorian - General
Re: Those holes are along the bottom of the aluminum frame because sweet frames like having holes... Or... - 12 years ago
Never mind. I figured it out. The two 8mm holes allow you to pass through the wires to the stepper motors and the smaller holes hold zip ties so that you can route wires along the back of the frame. Cool.by Dorian - General Mendel Topics
Those holes are along the bottom of the aluminum frame because sweet frames like having holes... Or... - 12 years ago
So on the single sheet frame there are two large holes that look about 8mm. Nothing goes in them. There are also four 3mm holes along the bottom edge. Cause... I dunno... I have never in all of the material that I've unearthed seen anything done with these holes. Did the frame just call out for more holes? Like needing more cow bell. Anyone have a clue what these are for?by Dorian - General Mendel Topics
Re: Next generation of RepRaps, which to build? - 12 years ago
I can tell you what I'm doing. I'm building an i3. The documentation (or lack thereof) is very frustrating. On the other hand, the openscad parts give me a lot of flexibility. I found motors on ebay that kick butt. They have high torque and included heatsinks... dirt cheap. Unfortunately they had 4mm shafts. No problem, I printed custom z motor couplers to tie to the 5mm threaded rod. I aby Dorian - General
Re: 1.75 mm vs 3.00 mm - 12 years ago
Dale, I've got goin on whatever the producer gave me on the spool. Nothing more and nothing less. Is filament tangled on the spool? Sometimes. You betcha. The more I can reduce my margin of error the better.by Dorian - General
Re: 1.75 mm vs 3.00 mm - 12 years ago
From what I've read region plays a part. In some places 3mm filament is cheaper than 1.75mm filament. I think this is a combination of the fact that 3mm is easier to produce and in some areas it is more readily available so the supply side is pushing down the cost. I'm not seeing a large difference in price here in the United States. I've been using 1.75mm at work but I'm building my machineby Dorian - General
Re: Prusa I3 alternative x-end? - 12 years ago
Which x-end are you doing now? Is it the latest from the box-style repository or is it the old vanilla style where the carriage looks like an upside down T? Are you using pla or abs? What are your slicer settings? Here is how I printed the new carriage and it came out okay. 3 loops, 1mm skin thickness, loops go out, 33% infill (straight lines), no support (no struts no grid no skirt) nada.by Dorian - General Mendel Topics
Re: On the edge of giving up on my i3
- 12 years ago
Thank you!!! I thought I had this beast figured out but I didn't know for certain until just now. This must be why I was warned that I would lose an inch off my build envelope on the x axis.by Dorian - General Mendel Topics
Re: On the edge of giving up on my i3 - 12 years ago
I think I'm going to try printing off the extra wide carriage and trying that. I have no other ideas at this point. It looks as if most people are using the vanilla parts and simply not trying to figure out these issues. If I ever get all of this worked out I'm going to post my progress on a blog.by Dorian - General Mendel Topics
On the edge of giving up on my i3 - 12 years ago
All, I have the X-carriage printed from Prusas git repository. I also, have the wades extruder from the same repository with the 50mm hole spacing which is supposed to mount the the carriage. I suppose that this would in fact work, were it not for the fact that there is a rather obvious hobbed bolt that runs through the extruder. This bolt, when in place, has no clearance at the top of the x-by Dorian - General Mendel Topics
Re: Nema 17 with a 4mm shaft? GT2 pulleys have a 5mm bore. Awesome... - 12 years ago
Thank you for that resource. The stepper motors I have currently have what appears to be a GT2 pulley of some sort already attached to them, though it only has 15 teeth. Also, it does not have a flange along the top so it seems as if the belt could slip off. The main problem is that the pulley is too far up the shaft. It's a pressed pulley so I cannot relocate the pulley further down the shafby Dorian - General
Nema 17 with a 4mm shaft? GT2 pulleys have a 5mm bore. Awesome... - 12 years ago
All, I'm in the process of building a prusa i3 using a single sheet aluminum frame. So far it's been a comedy of errors but that's cool because that's all part of the learning process. My latest hiccup is that I purchased 5 awesome Nema 17 motors but they have a 4mm shaft rather than the typical 5mm shaft. This poses a problem because every GT2 pulley that I can find has a 5mm bore. I'm notby Dorian - General
Re: plastic lifting off the bed - 12 years ago
I'm working on printing parts for my prusa i3 using a type A machine at work. The whole experience is very educational. The Type A Machine did not include a heated bed. Printing is a nightmare because there's roughly a 20% chance that the first layer will go down right even when you have done everything else correctly. All we can do is lay down painters tape and pray. So I've discovered a feby Dorian - Reprappers
Re: single sheet prusa i3 I now using box parts? - 12 years ago
Vegas, I appreciate your insight and make no mistake I noted your recommendations above. I am concerned about losing 3cm on the build envelop. I guess I'm just reluctant to baseline off the vanilla parts. I do understand where you're coming from.by Dorian - General Mendel Topics
Re: single sheet prusa i3 I now using box parts? - 12 years ago
Vegas, Thank you for the response, however, I will proceed with my build using the latest parts from the repo. I believe having the same parts across models is a move in the correct direction. I will not have to mix parts. I found my answer above. If I'm using the latest parts I am more equipped for later upgrades. Beyond that I don't care for the vanilla parts. The new parts are more developed aby Dorian - General Mendel Topics
Re: single sheet prusa i3 I now using box parts? - 12 years ago
Bollocks. I have to answer my own question. Look if anyone else falls into this trap there is a flag in configuration.scad I_am_box. Set the bunghole to zero so that it generates the correct z mounts. That is all. Nuggets. Just Nuggets.by Dorian - General Mendel Topics
Re: single sheet prusa i3 I now using box parts? - 12 years ago
Prusa3alu-frezovany-v4.dxf Pretty standard. And looking at it I can see that the new z motor mounts won't even work with it. Thereby making the documentation in the git repository positively infuriating. So now I'm left wondering if there are z mounts for this frame that allow me to use the new x axis and carriage.by Dorian - General Mendel Topics
single sheet prusa i3 I now using box parts? - 12 years ago
All, I'm currently printing parts for my single sheet prusa i3 aluminum frame. When I look at the documentation in the git repository it seems like you are encouraged to use the same parts now for both the single sheet frame and box style prusa i3. Is this correct? I feel like the z motor mounts would not be secure on the sheet frame because you can only anchor them with a single screw. Can yoby Dorian - General Mendel Topics