My plasma table design is coming along nicely. I am rebuilding my downdraft, water table and modifying it for cnc. I've got the motors, drivers (G540 gecko) , linear rails, cabling, and some of the miscellaneous parts. I am using belt drive on the Y and X axis and screw on the Z.
The G540 is a 10 microstep drive which gives 2000 steps per revolution. With a 10 tooth pulley and direct drive, this comes out to .0019" per step. This seems more than adequate for plasma machine. The motors have plenty of power for a direct drive and it's a lot simpler to build.
Does anybody have experience with direct drive machines and what accuracy is necessary ?
Thanks,
Willy