Hello to All
Just to finish off this Post, You would have read how we sorted the speed problem by using a different pin assignment, In the case now were mach was not recognising the M3 M4 M5 commands has been fixed as well, Many thanks to Hood for an interesting conversation this morning not all about CNC either. The Problem lies in the Version of Mach 2.63, So to anyone experiencing this trouble please download the latest mach version and install and your troubles will be gone. The only thing is Like me wright down all your settings in mach first so you can reconfigure the new Mach (eg config ports pins, Motor tuning, pulleys ect all Info you have put into config). Sometimes copying and pasting your XML files doesn't always work have a Backup saves a lot of trouble later.
All The Best
Katoh