C 14, TM 9-2350-230-12
Table 10-3. Electric Drive Control System Test Procedure
--Continued
FINAL GAIN AND BALANCING PROCEDURES
NOTE
Do not turn gain pots to within 60' or less of the clockwise stop.
b. If oscillation occurs in stabilized mode, adjust summing gain pots (4A15 circuit board) (ELEV) and 4A16
circuit board (TRAV) clockwise until oscillation stops.
3. The system balance is properly adjusted when weapon or turret does not drift with palm switch depressed, or
during the 2 or 3 seconds drop-out delay after palm switch is released.
a. Drift with palm switch depressed (Non-stabilized Mode). With palm switch depressed eliminate drift with
control handle trim buttons. Check both control handles.
b. Drift During 2 to 3 Seconds Drop-Out Delay. With palm switch released, eliminate drift on circuit boards
2A1 traverse and 2A3 elevation (amplifier balance pots); then again check for drift during drop-out delay. Repeat till drift is
eliminated. If drift is too severe, it may be necessary to adjust the motor-generator balance pots R-10 (TRAV or ELEV) to
eliminate drift. If an adjustment is made to eliminate drift during the drop-out delay, repeat check for drift in nonstabilized
mode.
NOTE
Do not readjust trim buttons to eliminate drift in stabilized mode.
c. Drift with Palm Switch Depressed (Stabilized Mode). With palm switch depressed eliminate drift with gyro
balance pots 4A12 (TRAV) and 4A13 (ELEV) circuit boards.
10-8.12