I use Gecko stepper driver G203v, Nema34 (Pittman) holding torque 1076 oz/inc and operated under Mach3. I have bought a used 4' X 8' Phoenix cnc router it's a heavy duty one with 1" X 48" lead ball screw in Y-Axis and 2" X 96" lead ball screw in X-Axis. Y-Axis running & jogging fine but X-Axis can't go faster than 35ipm when I try to air cut the part and motor also lose step, it's ratio 2:1 1 pulley 5" diameter 40 teeth and 1 pulley 2 1/2" diameter 20 teeth. I am thinking of changing that set of timing pulley into 5:1 ratio to increase the motor's torque or replace the nema42 with higher torque to make machine runs better. I hope somebody in the forum can help me with this matter with your thought.
Tom,