I like the idea of combining the Z home switch with determining tool height to work surface zero. Last night I wondered about using my Z axis' "bottom" limit switch somehow, since the TRUE bottom limit consists of a tool bit grinding into your table surface! Arghhhhh! My current Z home switch is located about 2/3 towards the top of the Z axis. Why? For lack of a better idea at the time I was mounting it... Thanks for the ideas thus far- I will let you know what happens. I will most likely use a metallic touch switch similar to the one I use on my Isel machine. The +5v will ground on the home switch when the tool bit touches the switch. Then it will back off a reasonable amount. Sounds like a plan. I'll let you know how it goes.
I would like to try cutting a PCB or two, with minimum depth cuts- so accurate Z zero will be very important.
Thanks, Mike
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