Thanks for your reply, it did help. Wat I really is after,- I initially set the zero x,y and z axis and want to start cutting the tool is scratching the workpiece. It could have been an automatic small raising of the tool until it get working. But I suppose it is small issue sins if I rise the tool after zeroing everything works fine.
The TCAD/CAM seems to be a powerfull and usefull softwere, pity the documentation is so pure. I look very much forward to your tutorials as I believe it is more to the program than I have discowered so fare.