Electronic Preset Gauge

and have never experienced the joy of running a tool into the part with a jog button (-:

I hate to admit it but I am on my 2nd one of these after "Jogging" the wrong direction after touching off. It has quite a lot of spring based movement to allow for that type of mistake but everything has a limit :apologize:.
 
Many home shop machinists have never used a machine that has no handles or mechanical hand wheels connected to leadscrews and have never experienced the joy of running a tool into the part with a jog button (-:
Very true. And even with handwheels, there's the possibility of chipping or otherwise damaging the cutting edges of a end mill (especially carbide) - or affecting the surface of the workpiece - when touching off. Here's an article by Rick Sparber (a forum member) illustrating a safe alternative way to get a Z reference:
http://rick.sparber.org/sawsem.pdf
Enjoy!
 
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