Minimum cost CNC/3D printer?
B) how can I feed that to an arduino uno line-by-line
C) how powerful does a laser have to be (when well focused) to burn wood or paper/thin plastic (black paper, of course)? Not cut the wood, just make a visable surface darkening, but cut the paper/plastic?
D) what is the simplest method to make a miniature extruder? my printer will have very little torque and size, not enough for the glue gun one, not my arduino enough IO outputs for a stepper.
Answers to any questions are appreciated.