I just got into hobby CNC and found I am way over my head. I run CNC machines at work, but they are already configured.
When I try to configure Mach3 in motor tuning, I end up with a DRO display that doesn't match the actual movement of the table. I am using a dial indicator to measure the actual table movement.
I checked the leadscrews on the Sherline with a thread guage and it is 20 TPI.
Divide 1 by 20 and I get 0.05" screw pitch. Which gives me 20 revs/inch.
The steppers are labeled as 1.8 degrees/step so I have 200 steps/rev. 200x20 gives me 4000 steps per inch(?)
In the Motor Tuning screen I set the STEPS PER @ 40000 VEL @ 12.75 ACEL @ 0.5625
I checked and Mach3 is set to "inch". So what simple thing is there that I am overlooking?