so, its all now going. Im working out bits as I go along slowly but surely.

So Im milling my mdf spoil board flat so, the machine is going
Y0,
Y800
X2
Y0
X4
Y800
etc etc

side to side stepping back 2 on every pass

now.. if I press STOP in mach3... the machine abruptly comes to a stop. I press goto Z and I suspect the Y has slipped a little? Its more noticeable if I start the program again... the pocket its milling out of my spoilboard seems to have moved over slightly?

does this make sense to anybody?

matt