Arduino Uno R3 + Arduino Motorshield Rev 3 + Grbl

[EP1]

Hi,
New here and thanks for an excellent resource.

We've decided on a dlp printer as a possible project in our makerspace and have a spare Arduino Uno and the official motorshield Rev 3 with a NEMA17 stepper. I was wondering if anyone has played around with this config for a z-axis control for a dlp type printer?

Grbl firmware assigns the pins D12 and 13 on the Uno to the spindle. Would it be as "simple" as editing the pin mapping in Grbl and compiling & flashing to the Uno to use the motorshield?

Or is there a more straight forward way using this type of config? We're hoping to use Creation Workshop as the eventual control software.

Any comments, suggestions and advice would be greatly appreciated.

[PacManFan]

[EP1]

Thanks, will keep the forums up to speed with the build and stumbling blocks.

[JJE]

Hey guys,

Pretty new here, building a big dlp printer, had no exp with electronics whatsoever and desided to go with same electronics config, arduino uno R3 + the official arduino motorshield. Now I'm starting to regret my decision on going for reliable electronics since there is so few info on this motor shield. I figured out how to change de grbl pin config and flash it to my uno but i can't manage to put the correct pin numbers it seems... Any update on the editing you did in the pin config?

[JJE]

from what i've been reading online, this board isn't compatible with grbl, because its a dual full bridge and it doesnt use the usual step and direction inputs... this sucks...

[DepthDesign3D]

Unfortunately I found this out after getting my hands on a motorshield. I've resulted in using EasyDriver boards instead, hopefully I can fit two onto a protoshield. The motorshield may be compatible with Marlin if you were keen to try it out.