Or you could get a coaxial indicator like
this.http://www.ebay.com/itm/262647994320
From: Gene Heskett <[email protected]>
To: [email protected]
Sent: Friday, October 7, 2016 7:33 AM
Subject: Re: [Emc-users] pressure equalizer method around ball nut
Film at 11, but day unknown. :) When I get the other two thru holes
bored, I think next is an insulated probe so I can find the exact center
of the thru holes on the mill. Thats something I've yet to cobble up.
Squeeze a piece of 12ga solid copper in a couple layers of heat shrink
in the drill chuck, split the end of a stranded wire & wrap it around
the solid wire for the G38.2 probe connection, bending the end of the 12
gage solid so it, when spinning at a couple hundred rpms, fits in the
hole & the machine doesn't have to move all that far to find all
four "corners" of the hole, from which the exact center, well within a
thou, can be found.
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