6-14.2 Aline Planimeter Encoder - Continued
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TM 5-6675-326-14
Attach positive lead from meter to pin 3 on U1 chip. Attach negative lead to pin 12.
Turn B/ACCU/A/OFF switch to A.
Take voltage reading on encoder calibrator. Divide voltage reading by two to obtain encoder alinement
voltage.
NOTE
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At pin 3 and pin 12, voltage should be 12 vdc.
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The encoder wheel must be turning to aline.
Turn B/ACCU/A/OFF switch to OFF.
Disconnect positive lead from pin 3 and attach to pin 1, Leave negative lead on pin 12.
Turn B/ACCU/A/OFF switch to A.
While encoder wheel is turning, adjust P1 by turning screw slowly to obtain encoder alinement volt-
age (6 q 0.3 vdc).
p. Turn B/ACCU/A/OFF switch to OFF.
q. Disconnect positive lead from pin 1 and attach to pin 2. Leave negative lead on pin 12.
r. Turn B/ACCU/A/OFF switch to A.
s. While encoder wheel is turning, adjust P2 by turning screw slowly to obtain encoder alinement volt-
age (6 t vdc).
Turn B/ACCU/A/OFF switch to OFF.
After encoder alinement is obtained, coat adjustment potentiometers, P1 and P2 with acrylic orange
resin.
Disconnect and remove probes from dip-clip.
Reinstall encoder in housing (para 6-14.1).
Reinstall top on auto-scaler. Secure with four washers and screws.
Change 1
6-151
