According to my calculations, if you are using a .2" lead ball screw to move the gantry, with a 4:1 reduction at 2800rpm will give you 140"/min feed. If your gantry weighs 200lbs the important thing is to keep the inertia ratio between motor and load to under 10:1 at the required accel. decel. rate.
But the advantage with reduction is that the drive torque required due to inertia decreases by the square of the reduction, so at 4:1 you have reduced the drive torque required by 16.
Al
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |