Schaublin 125-CNC retrofit.

reversing the encoder - not sure how you did that but keep in mind there are two things reading it and you can have it backwards on either.
Since you motors jog properly by the motor drive, the wiring is fine between them.

When you jog (with the drive controls) towards the chuck in Z, does the feedback count down in linuxcnc? It should.
You can set that by negating the feedback scale.

Then you need to check if the linuxcnc jog buttons move the axis is the right direction.
you can negate the scale to change that.

The target is having the linuxcnc positive jog button to move the axis in the positive
direction and the feedback to count in the positive direction.

Otherwise PID tuning is useless.

There is a openloop test in pncconf to help with this (if you used pncconf)

Chris

in that case, try turning up/down the maximum velocity in linux CNC config, see if it is a issue of acceleration versus actual

Goo point Chris. I think I checked that while jogging (The video summarises a few hours of working through those settings). I need to start again with a fresh head, as I got confused by the end. Since I have a wiring problem on my X axis, I did a modular HAL, with axis in it's own Hal, so it is easy to comment out X.  This means that the Config widget in Linux CNC cant read it.

Hello Wout,
I would like to take you up on you offer of assistance. MyEmail address is on the "about" page of my youtube home page. Thanks again for you offer.
Mark

No step forward, one backwards...

You lucky ....
If i miss-wire something, the whole town goes up in smoke!