My #3dprinted #openscad cam driven plotter has power now :)
Electronics are reused from a previous project (the "bannister painter 5000") but reprogrammed a bit. Given that a complete revolution was more steps than I expected it's possible that I managed to make the wrong number of teeth on the printed drive pulley which would be mildly embarrassing
At the moment the draw speed is roughly constant around the outline, I do wonder if some control of acceleration might be better