Potentiometer only effective at mm/min (lathe)

Hello community,
I have another problem to solve, namely my feed potentiometer only works at mm/min.
It has no function at mm/rev. The potentiometer for rapid traverse always works.
Is there no other way or can it be influenced?
If you have to run in a program, a potentiometer like this is very helpful

Thanks and best regards
Olli

Does nobody really use Probe Basic Lathe?

It doesn't matter whether it's mm/rev or inch/rev, the same effect should occur with both if it's normal that you can't use a potentiometer.