Quote Originally Posted by Lester View Post
I know where the pulse polarity setting is so can try to change that later, not sure if i can see why one axis would be different to the other two (if my wiring is correct.......).
This is a common issue and happens with lots of drives/controllers and never gets noticed by most as they don't run toolpaths with a high number of direction changes like adaptive or 3D work.
The reason it can be different on one drive to another is often that it's set that way in software at the factor. The polarity switch just flips the state.

There is an easy test just knock up a test file that runs 200 lines of short back n forth G0 moves with last move back to Zero, 10mm is plenty. Then Zero axis and Mark the spot. If all is correct it will return to mark. Do this on all Axis.