TM5-6675-326-14
4-6.2.1 Preliminary Procedure - Continued
(5) Alternately loosen stage lock knobs and move stage up or
down keeping readings on each scale equal.
(6) Record high and low readings where image of stage target
just starts to go out of focus.
(7) Set stage height halfway between high and low reading.
j . A d j u s t i n d e x m a r k.
( 1 ) L o o s e n s c r e w.
(2) Move mark up or down until index
c r o s s p i e c e.
( 3 ) T i g h t e n s c r e w .
l i n e i s l e v e l w i t h
4 - 6 . 2 . 2 O p e r a t i o n
a .
Select and position material to be used.
(1) For photographic revision of map, place photograph on
glass stage, and place map on table.
( 2 ) F o r m a p g e n e r a l i z a t i o n, place large-scale map on glass
stage, and place small-scale map on table.
4-19
