Hi Graham thanks for the reply. That is bad news. Come on Art forget Quantum, fix Mach.

As i lose position every time i run the part, i will do a subroutine for the Z axis.
But i am unsure of the correct syntax for subroutines i have searched the forum and found none, i have only seen the examples in the PDF manual.
Do you have an example to hand ?
The machine works fine except in exact stop mode
Phil_H