Jazzcnc et al

Thanks once again for helping man the pumps, problem resolved but not completely understood.

After much installing uninstalling etc. etc. I took another look at the spindle setup and unchecked the "use spindle feedback in sync mode" this cured the problem running under XP pro and G76 emulation now works correctly. What I don't understand is, with this box checked the simulation works just fine on my laptop running windows7.

It's all PFM!

GeoffV