BUG-O Systems Universal Bug-O-Matic - Manual (Page 30)

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SERVICE PROCEDURE: INSTALLING THE CROSS ARM (WPD-1150)
OPTION 2 - The Electrical Way
Tools required: Ohm meter rated to at least 5k Ohm, flat screw driver, 3/32" hex key, tape measure or
other measuring device.
1. Place the machine on blocks to protect the pinion (underneath).
2. Remove Right Side Panel (BUG-5708) from the clutch-side of the Drive Box (BUG-5710).
3. If necessary, install the Cross Arm (WPD-1150). Insert from the brass gear side. Make sure the
brass gear teeth and the V-guide teeth do not skip.
4. Center the cross arm. The cross arm will stick out of the machine by 4.25 in (110 mm) on side
when centered.
5. Loosen only the set screw on the gear side of the coupling between the potentiometer and the
brass gear. Refer to figure 8.
6. Unplug wire harness leading from Potentiometer.
7. Using Ohmmeter, measure resistance across Node 1 and Node 3 (refer to figure 9). This should
measure approximately 5000 ohms.
8. Rotate potentiometer until resistance across Node 1 and Node 2 is equal to resistance across
Node 2 and Node 3. This should be approximately 2500 ohms. The potentiometer is now centered.
9. While being careful not to move the potentiometer, secure the coupling to the gear shaft.
10. Plug wire harness from potentiometer into proper terminal on the speed control board (CAS-1770).
11. Connect to power supply of appropriate voltage, turn machine ON and verify that Cross Arm is
centered.
12. Install Right Side Panel.
13. If necessary, install the Arm Stop (WPD-1164) and gun mounting hardware to the ends of the
cross arm.
Figure 8: Simplified side view of machine with right cover
(BUG-5708) removed.
Brass
(Encoder)
Gear
Potentiometer Coupling
1 3
2
Figure 9: Potentiometer
nodes used in Steps 7 & 8.