Quote Originally Posted by kingcreaky View Post
if I put G61 at the beginning all is fine.... what is that all about then? why all of a sudden is it playing up?
Looks like it's something to do with changing the acceleration settings then. Go into your mach3 folder (probably C:\Mach3) and find and copy the .xml file for your machine and post it here, then we can check the settings. It'll be called whatever the name of the machine profile is, which you click when loading Mach3, with .xml on the end. Or just post a screenshot of the X and Y motor tuning settings, but the whole thing is better.