It depends on what your mfg. floor can do. I've run across from .5mm or less
to .25mm or less.
The locations also vary, (centroid or 2 to 3 in the corners) depending on the
how they are set up.
I prefer .25mm w/ a centrally located fiducial.
Michael Kuczynski 201-393-2122 (Phone)
Allied Signal 201-393-6688 (Fax)
688 Rt46E E/K4
Teterboro NJ 07608
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