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|  MIL-D-45502B
(motor stopped) shall be vibrated at 80 Hz and .40 inch total displace-
ment parallel to the drive rotor axis for one hour. Drives shall be
mounted to a vibration table using the mounting techniques specified in
MIL-STD-810, Method 514.1. The general requirements of MIL-STD-810 shall
apply as applicable. Pre-test performance data shall be determined by
function testing as specified in 4.6.2.5. After completion of the
vibration tests, drives shall be function tested.
4.6.2.2 Direction of rotation test. Drives shall be tested by
energizing each stator winding separately, and then energizing both
stator windings simultaneously.
4.6.2.3 Motor dielectric withstanding voltage test. Drives shall
be tested by applying a high potential voltage between each motor winding
connector terminal and frame for a period of 30 seconds. Test voltages
shall be free of recurring transients or high peaks. High potential test
voltages shall be reduced 15 to 20 percent for-retest of motor windings
preciously tested at the voltages specified.
4.6.2.4 Brake tests. Drives shall be tested by application of
18 volts (de) to the brake solenoid connector terminals, and for brake
return to the applied position when the brake solenoid is deenergized.
The brake circuit shall also be tested by application of 31 volts (dc)
to the brake solenoid connector terminals for a period of 15 seconds.
At the completion of this test, brake circuits shall be tested for
dielectric withstanding voltage, insulation resistance, and direct cur-
rent resistance in accordance with the applicable drawings. High poten-
tial test voltages shall be free of recurring transients or high peaks.
*
4.6.2.5 Functioning test. Drives shall be tested for at least one
2-second duty cycle at ambient temperature using the power supply speci-
fied in 4.6.1.1. The drive shall be assembled to a slave M61/M61A1 gun
or the load specified in 4.6.1.2 applied. When the drive is tested with
a slave gun, belted dummy ammunition and a slave M2A1 feeder shall be
used. The booster takeoff assembly shall be loaded to simulate booster
takeoff assembly function conditions. The acceleration time, steady
state rate and stopping time shall be taken and recorded for each drive.
*
4.6.2.6 Endurance test. Drives shall be tested for 300 duty cycles,
in series of 5 duty cycles at ambient temperature, using the power supply
specified in 4.6.1.1. The drive shall be assembled to a slave M61/M61A1
gun or the load specified in 4.6.1.2 applied. When the drive is tested
with a slave gun, belted dummy ammunition and a slave M2A1 feeder shall be
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