TM 5-6675-319-14
NOTE
Ratio of 1.5:1 is achieved when length of any one of the projected
f i d u c i a l l i n e s i s 2 5 ± 0 . 5 m m .
(10) Operate magnification movement
t o o b t a i n m a g n i f i c a t i o n r a t i o o f 1 . 5 : 1.
( 1 1 ) C r a n k Y - d r i v e k n o b u n t i l i m a g e s o f l e f t a n d r i g h t f i d u c i al
about midway between width of guide bars.
marks are
(12) Rotate X-drive knob to position film stage at least 70 mm to left of
i t s z e r o p o s i t i o n .
(13) On paper, mark images of left and right fiducial marks.
(14) Shift film stage right, beyond its zero position the same distance
a s t h e l e f t .
(15) On paper, mark images of left and right fiducial marks.
( 1 6 ) W i t h a r u l e r , d r a w a s t r a i g h t l i n e t h r o u g h t w o o u t e r p l o t s o f f i d u c i al
marks.
Any departure of two inner markings from drawn line indicates direction of
r o t a t i o n t o b e a p p l i e d t o f i l m s t a g e t o c o r r e c t i t s z e r o p o s i t i o n.
If adjustment is
required, proceed to next step.
If adjustment is not required, proceed to step
( 1 9 ) .
(17) Unlock swing drive and rotate film stage toward straight line,
approximately one-half distance of departure .
If separated marking is required,
move paper on easel.
(18) Lock film stage in new setting, and repeat steps (12) through (17)
until there is no departure of fiducial mark images from last line drawn.
Loosen
two screws for index of swing scale, adjust to zero, and tighten screws.
(19) Disconnect TILT and MAG assemblies and store.
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