Every time I set my Z height, when I hit start , it goes straight down and plunges into the wood.  I have to zero my Z height two or three times to get it to work right.  I am tired of wasting wood.

I am using Mach 4 Hobby
PMDX controller

Thanks,

Bill Pardee

Check your tool offsets, if you are only using 1 tool then you do not need a height value in the offset for that tool.

Check your tool offsets, if you are only using 1 tool then you do not need a height value in the offset for that tool.

And once that's done, read the gcode and see where it's telling the machine to go.