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TM 9-4931-710-14&P
5-8
COLLIMATION
AND
INSPECTION
--
CONTINUED
SETTING
UP
COLLIMATION
STANDARD
--
CONTINUED
Note
If the base was not perfectly zero over
the two pins, level the head with the
s a m e amount of offset, i.e. (base
0.0000 in. over one pin and 0.0002 in.
( 0 . 0 0 5 0 mm) over the second pin).
Then the head should be set the same.
There is a 0.0002 in. (0.0050 mm) tol-
e r a n c e for parallelism between the
head and the dovetail, but the closer to
zero, the more accurate the collimation
standard will be.
Clamp head assembly (7) and collimation
standard (2) together with two clamps (17)
to hold steady.
Recheck parallelism of standard.
Tighten three screws (10) and remove two
clamps (17).
5-22
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