I want to create a simple xy machine that can draw with pencil on paper but with the possibility in mind that it can grow into a laser engraver or 3d printer. I am going to start by using cheap general purpose material and 2 old flatbed scanners. And I use my M3d Micro 3D printer to attach the elements together.
Square aluminium profile, 20x20x1.5mm of 460mm length
this will form the square frame of 500x500mm
Lineaur Bearing LM8UU
Rotation Bearings 8mm
2 scanner steppermotors
2 motors for the x axis
I bought a 2 meter long square tube aluminium profile a the local store of 20x20x1.5mm size. I saw it in 4 pieces of 460mm length so with the 20mm corners that I am currently printing, the size of the frame will be 500x500mm.
I dissasambled the 2 flatbed scanners, which I plan on going to use the sliders and the steppermotors from. I think I will skip the belt drive and go for direct drive threaded rod actuators, because it seems more straight forward and can use less precise (less rotation per step) stepper motors.