I am not familiar with Surfcam but if your control has the G-code threading operation that has the Z offset function built in then that is far the easier way.
Of the top of my head, I cannot remember the the canned G code that does it.
Al.
__________________
CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |