Quite frequently my MACH3 CNC router will Home at slow or incredibly slow rate (few mm/min) - even when I have not run any G-Code. If I press Stop, it will go to Zmax at a proper speed and then Home will now proceed at the normal rate.

Where is MACH3 getting this (variable) slow speed from and what can I do about it?

Has anyone else seen this problem?

Many thanks, Nick