Quotemikropehmo z motor is never stepped during x or y movement anyway - or is it? The 'spiral vase' mode of slic3r>=0.9.10 moves up slightly with each movement. I could also imagine hopping the head over existing perimeters to avoid dragging, although I don't know of any slicers that do this. I think as long as you don't enable anything too fancy in your slicer then making this assumption sby sbliven - Controllers
@james Thanks, that makes me feel better about pushing forward with my build. @NumberSix Using a wood scrap sounds like great advice. I'll give it a try once I get another bolt to practice on. I'm using 3mm filament. I almost feel like just a 3mm groove with some rough scratches would hold the filament tight enough, even without threads to dig in. That would be a whole lot easier for new reprapby sbliven - Reprappers
I was having some problems with x axis drift. It ended up being a problem with my idler pulley not being tight enough. When I tightened the belt fully it pulled the idler so that it was no longer perpendicular to the belt, causing the belt to drift to the outside regardless of how I adjusted my x-carriage.by sbliven - Reprappers
I'm building my first printer (prusa i2) and just hobbed my first bolt, following the instructions on the Wade's Geared Extruder page. The resulting bolt looks like crap compared to commercial ones I've seen–very shallow teeth, and the teeth weren't totally lined up between different turns with the tap. However, when assembled in my Wade's accessible I'm unable to strip the filament by hand. Do yby sbliven - Reprappers
The new link works for me. Thanks. So are you going to be selling these boards?by sbliven - Controllers
If I'd researched a bit more, I would have discovered that Teacup can fit on a ATmega168 with only 16K of flash. So I'm going to conclude that Arduino Uno-based electronics will work fine.by sbliven - Controllers
What's the use of the stepper enables? Can I just keep all the motors enabled all the time? I'll ask about Teacup memory requirements (while running) in the firmware forum, but from what I see it seems like I should be able to make this work. Sweet! I'd love to hear from anyone who's actually gotten a reprap running on a ATmega328. If you could post a Teacup config.h file that would be brillianby sbliven - Controllers
I'm excited about building my first reprap, but I'm afraid I don't have the budget to buy all the vitamins together now. Instead of saving up, I'm trying to build a prusa incrementally. Here's my plan: 1. Microcontroller & Power supply- $30 There are lots of cool electronics projects to do with just an Arduino. Of course, later on I'll have to build some reprap electronics which work with anby sbliven - General
From their website, the Fab Lab seems to be quite active still. They seem to mostly offer programs through UCSD extension, so I'm guessing they just use space on campus for workshops? They don't seem to be doing any 3D printing, judging from their art gallery. However, there's some really nice lasercutter work! The electronics projects look pretty cool too. Too bad there isn't a SD user group.by sbliven - California, Los Angeles RUG
I was recently given an Arduino Uno (ATmega328) as a gift. I was hoping to use the Uno as the basis for reprap electronics. I noticed that all the recommended electronics use the ATmega644 or better. However, Teacup (and maybe other firmware?) has a compile option for the 328. Is it possible to use an Uno to control a reprap? The main limitations I could see are: - smaller Flash, SRAM, and EEPby sbliven - Controllers