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Posted to rec.crafts.metalworking
Karl Townsend Karl Townsend is offline
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Default The mill has homing switches on all axes

I just use a cheap logic probe like this:
http://www.dealextreme.com/details.d...117~r.19277804

For TTL (5Volt) and CMOS (12 volt) compture signals

and a cheap multimeter available at any big box tool store

Karl