While I'm waiting for the parts to arrive, I do some read-up on what to do once they get here. Right now I'm trying to wrap my head around current-adjusting. Right, so what the wiki says and what most of the forum posts I find says is that I should use the formula Current=VREF(8*Rs), and that the Rs value for the Polulu is 0.05Ω, but if it's a Stepstick it's 0.02Ω, and... Well, with all the ebayby loidor - Controllers
Bah. I just noticed that the bad-ass motor is 60 mm, not 48. Well, I guess that means I'll have to print some foundation thingy for it to stand on, so the bad-ass one can be recessed 12 mm. C'est la bloody vie, I guess.by loidor - Smart_Rap
Quoteregpye Hi ioidor, where is around here? you can't be more isolated than me in rural South Australia. Rural South Australia is like the suburbs compared to foresty Sweden, I'll tell you. ;-) Or, well, not totally, but since one metre of 6 mm axis rod is worth about 40 Swedish crowns (£4 or something) at the most (might even get it for half that price once I find a bloody seller), there's nby loidor - Smart_Rap
Quoteknife-edge Why not build a Smartrap from the start? You can buy the plastic parts on eBay or I'm sure someone here on the forums to would be willing to print you a set. Well, first of all I got the wood, and secondly I will remix it a little to get rid of the 6mm rods (these are totally impossible to find around here, and I already have 8mm),and lastly it seems a bit... Too easy. I want toby loidor - Smart_Rap
Quoteregpye In Australia which is close to China really, it still takes about 5 weeks for the free postage to arrive. If you want it quick, 3-4 days, you have to pay for a courier service and that is very expensive. If you want good motors cheap and want quantity, try this guy, he has been very helpful to me. Roy Yan | Salesman | LDO MOTORS | www.ldomotors.com | | TEL: +86-755-82418663 | Cell Phby loidor - Smart_Rap
Also, if I'm not mistaken I should be able to turn them down to getting about 1A, and they should still have a torque of about 0.5 Nm. Right, so now it's just that damn waiting for them parts to arrive... Blimey, why is China so far away?by loidor - Smart_Rap
QuoteBackEMF How much current do they consume? and are your pololus up for that task? Uhm... I guess so? Their specs are 1.7A and 5V, but then I've planned to have fan cooling on the RAMPS board... The motor should be so oversized for the task it would stay quite cool. The other choice would be one at 0.42 Nm, which rates at 1.7 and 2.8V.by loidor - Smart_Rap
I was planning on building a wooden, verrrrry slow direct drive extruder to print a more proper one, but I guess I could opt for a more powerful motor initially. The wood I'll be working with is 1"x½", so it's practically the same weight as the plastic. What about shaft length? The ones I'm eyeing are 24mm, which I think should work, but I've seen even cheaper motors with much shorter shafts, roby loidor - Smart_Rap
I'm just getting into 3D printing and will build a wooden repstrap in order to print me a smartrap. So I'm stuck at motors. What should I aim for? Torque? Shaft length? Dimensions? I can get hold of 0.34 Nm motors quite easily - will that do for the extruder?by loidor - Smart_Rap