Hi, D CUSTOMS
I'm sorry this has turned into a Mathmatical/Threory Class.
For Sure You Can Calibrate any Axis without knowing anything about the BallScrew Pitch or Reduction/Gearing.
Mach shows on it's DRO's to .0001 ackuracy, But in fact it retaines a .000000000000001 "15" dec. point's or so I Think, Precision Accuracy (The Remainder is "Applied" to the "Closest Step Per" Unit as setup in Motor Tuning.
In my last post I was trying to help you find out If you have Backlash Issues Also.
OK
Using the 20,967 that's Giving you a 1 inch move.
Move the axis "pos" 1 inch "Pre-Load", (It takes backlash out, If there is any.
Then zero the indicator and your linear scale DRO, Move in the pos dir 1 inch.
Dose the indicator show a 1 inch move. ? _____________
Dose the linear scale "DRO" show a 1 inch move. ? _______________
Dose the Mach show a 1 inch move. ? ______________
Now move the other direction 1 inch.
Does the indicator move back to Zero, ? _________
Dose the linear scale "DRO" show a 1 inch move. ? __________
Dose the Mach show a 1 inch move. ? ________
If the indicator dosen't return to 0, The distance to go is "Backlash".
Thanks, Chip