On Sat, 17 Nov 2007 10:03:19 -0800, Clark Magnuson
wrote:

When I use dial calipers, I maintain the same thumb pressure, clean the
jaws, and zero often. I try to rock them into perpendicularity, and
measure with the same spot on the jaws each time. I check my accuracy
with pin gauges.

Have you adjusted the gibs on all of the calipers?


Mark Rand
RTFM