Build Your Own SLA/SLS

That did it! Thanks Pomeroy.

I'm doing it because my carriage is heavy and moving at high speeds was jerking the whole machine around

Thanks CNC, You're totally right. Found the setting in Sprinter last night which disables the motor after moves and got it to stay on. plenty of holding power now :) The Nema 17 probably would've worked too if it was set up like this. I took off the brake, motor was actually making some noise while ...

Thanks Pomeroy. I've tried turning the pot, it gets stronger up to a certain point then seems to cycle back to 0 if you keep turning. (no mechanical endstop on the pot) I think it's at max voltage...at least as high as it could go before it cycles back. I was using a metal screwdriver though while i...

I've finally got an early prototype working using the top-down method, an Acer H6510BD, and Fun To Do Industrial Blend, but I'm having a few issues currently that I'm working on figuring out. First thing - leveling the print bed - what types of methods are good for this in a top down set up? There ...

I've used DRV8825 Stepper Drivers from Pololu to drive Nema 23 motors on a Plasma Cutter CNC. They're really nice because they are pin compatible with A4988 drivers , so you can plug them into a RAMPs 1.4 board. Thanks Pomeroy! So I tried the nema 23 with the A4988s I had lying around and it works!...

Hi all, is it possible to have acceleration in CW? here are my sprinter settings // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot. #define _ACCELERATION 3000 // Axis Normal acceleration mm/s^2 #define _RETRACT_...

My thanksgiving project

Version two of my printer, this time shooting for size -- 12"x5"x8"

Something like this? http://www.ebay.com/itm/Single-Axis-TB6600-0-2-5A-CNC-Engraving-Machine-Driver-Controller-Stepper-Motor-/321454918858?pt=LH_DefaultDomain_0&hash=item4ad834ccca or maybe this http://www.ebay.com/itm/2x-Single-1-Axis-TB6560-3A-Motor-Driver-Stepper-Board-CNC-Router-Controller-n...

I was running 2 Nema23's with my RAMPS 1.4 and the Pololu's. I was only using a 12V 5A power supply and they seemed to work with no problems. You can bump it up to I think 30v if you need more but not sure why you would. The SLA printers dont really have to move the axis very fast. 12V is probably ...

Looks like the brake is electronically separate from the motor? I suppose you could turn it on/off with a relay controlled by the aurduino and gcode. Us CNC mill guys often use counterbalances to offset a heavy spindle on the z-axis. Is that a ball screw that turns so easily when the stepper is dea...