thanks Tweakle
will try, but would this also change the X axis as well ??
If I program a straight line cut say X100 to X200 and then X200 to X100 the knife goes in the correct plane,(direction)
if I program a line say Y100 to Y200 and then back again the knife works in the wrong plane.
Thats what happens when I try to aircut a square.
Will try tommorrow, its 10.15 pm here in West Australia and post a reply.
Thanks ET