Hello,
I am sure this is a simple fix, but I can't seem to figure it out. I have a cnc router table that I have built. The X and Z axis are run off of 1.8 degree stepper motors, and ball screw systems that are attached directly to the motor shaft. Basically they work fine with the six rotation per inch acme thread. The problem however, is that I couldn't get the Y axis to move smoothly with the acme thread driving it from center, so I replaced the acme thread with a rack and pinion set up. it works great, except the gears are also direct drive off of the motor. Because of the gear size, they move at close to 6 inches per rotation. I have used the motor tuning section of mach to get the steps per inch worked out and such, but the speeds are something I can't seem to figure out. My system will error out every time there is a straight Y axis movement because it moves too fast. Is there a way to run one motor at a different speed than the others? I would prefer not to try to gear down this motor because the ratio is so different. I was hoping there was some sort of set-up I could do in Mach to make this work.
Thanks