Good day folks. When I set the Z either using AUTO ZERO button or manually, it doesn't seem to "remember" it. So many times I Have set the Z to zero then ran the code and it plunges into the work or sits and moves around in the air. 
What gives?? Am I missing a setting or something?? 
MACH 3  Version R3.043.066  is what I am using. 
I would love to fix this. 
Andrew