TM 9-1240-400-34&P
3
Rotate azimuth fixture ring (6), counterclockwise,
7
Difference between readings in steps 5 and 6 is
to 800 mils.
amount of backlash and must not exceed 0.5 mil
when read on azimuth counter (5) and 0.75 mil
4
Rotate deflection knob (1), clockwise, until
on reset counter (4).
reticles coincide. If coincidence point is
overtraveled, rotate deflection knob,
8
Rotate azimuth fixture ring (6), counterclockwise,
counterclockwise, one-half turn past coincidence
to 1600 mils.
point and repeat this step.
9
Repeat steps 3 thru 7. Deflection counter (3)
5
Deflection counter (3) should increase by 800
and reset counter (4) should indicate 4800 mils.
mils + 1.0 mil and reset counter (4) should
increase by 800 mils + 1.0 mil. Record readings.
10
Repeat steps 3 thru 7 above, every 800 mils,
until head assembly (2) completes 2 full
6
Rotate deflection knob (1) approximately one full
revolutions.
revolution clockwise. Rotate deflection knob
slowly, counterclockwise, until panoramic reticle
11
Replace deflection counter (3) if readings
coincides with collimator projector reticle.
exceed tolerance in step 7. Refer to page 2-42.
Record readings. Be careful not to overtravel
coincidence point. If coincidence point is
12
Replace reset counter (4) if readings exceed
passed, repeat.
tolerance in step 7. Refer to page 2-42.
2-73
