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General Mach Discussion / Re: How did he / How do I do this?
« on: July 26, 2010, 04:42:27 AM »Quote
To me it looks like its just a physical switch that is operated as the Z goes below a certain height and that switch operates a solenoid for the air.
I agree with Hood - this is probably the easiest and best way to do it.
(I think the video shows that the air is cut at the start of the drill retract operation though).
Tweakie.