Originally Posted by
MikeAber
Hi Guys,
My TORMACH PCNC1100 is using a 1200 oz stepper driving the ballscrew direct on the Z axis and 640 oz direct drive on the X and Y. The column is bigger, the head is bigger and everything else is bigger. The X, Y, and Z travel is less than my IH mill.
The ways on my IH mill were real rough, the head leaks oil, and the motor has been temperamental. Other than that, I still use it at least once or twice a week to make something.
Get the larger motors for direct drive. The 640 oz motors would work fine with 2:1 belt drive reduction (5tpi ballscrew). I believe the IH kit is using 2:1 belt drive reduction.
Mike