TM-9-1240-400-34-P
TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1993
TM-9-1240-400-34-P - Page 88 of 344
TM 9-1240-400-34&P
2-17.
M115 PANORAMIC TELESCOPE FINAL INSPECTION INSTRUCTIONS (CONT).
DEFLECTION ERRORS (800 MIL STEPS) AND BACKLASH (DEFLECTION MECHANISM) INSPECTIONS
1
Rotate deflection knob (1) until head assembly
(2) makes 2 full revolutions.
NOTE
•
Deflection
error
and
backlash
combined must not exceed 1.5 mil
between positive and negative error.
Total error, excluding backlash,
between deflection counter (3) and
reset counter (4) reading, for any
one number, must not exceed 0.5
mil.
• Backlash in deflection mechanism
must not exceed 1.0 mil when read
on azimuth counter (5) and 1.25 mils
on reset counter (4).
2
Collimate telescope.
Refer to page 2-69.
2-72
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