Chuck Rotary tool setup

A few possibilities:

  1. He simply misspoke
  2. $141 used to be used for backlash but has changed. This seems unlikely but it’s possible. $161 is Y-axis backlash compensation.
  3. He goofed and misremembered

I don’t see why a chuck rotary would have any more backlash than other systems. In fact, I’d expect it be less than a belted system.

Note that the value he enters (600) would be appropriate as a current value in milliamps but wouldn’t be appropriate as a backlash correction in millimeters.