Jog down slowly until you touch the surface, and zero the Z axis at that point. Some use a thin piece of paper and jog down until they touch the paper, then zero.
Or do something like this. http://www.cnczone.com/forums/showthread.php?t=36099
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Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |