QAL Medical 480, Service And Technical Manual

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Installation:
1. Solder the Potentiometer cable wires to replacement Potentiometer if required. (See section 4.2)
2. Install the Potentiometer Drive Coupling end with the short slot into the casting. Make sure that the slot
engages with the inside pin.
(Steps for 480/ 480E)
3. Enter calibration mode using the Calibration Procedure in section 11.1, steps 1 through 13. The motion
controller screen will display “EXT [40-50] xx” where xx is a number indicating the angle the Potentiometer
is currently at.
4. Gently insert the Potentiometer into the casting. The Potentiometer must be able to rotate in the casting.
Make sure that the pin on the Potentiometer shaft enters the long slot end of the Potentiometer Drive
Coupling.
5. Rotate the body of the Potentiometer until xx number on the controller screen is between 40 & 50.
6. Press the Potentiometer firmly into the casting until the shoulder of the Potentiometer contacts the casting.
Confirm that the xx number on the controller screen is between 40 & 50.
7. Confirm that the Potentiometer is secure in the casting.
8. Proceed with steps 14 through 27 of the Calibration Procedure in Section 11.1.
(Steps for 480E PRO)
9. Switch the 480E PRO power on.
10. Gently insert the Potentiometer into the casting. The Potentiometer must be able to rotate in the casting.
Make sure that the pin on the Potentiometer shaft enters the long slot of the Potentiometer Drive Coupling.
11. Rotate the Potentiometer body until the angle indicated on the Motion Controller is “0” degrees.
12. Press the Potentiometer body firmly into the casting until the shoulder of the Potentiometer contacts the
casting. Confirm that the angle indicated on the Motion Controller is “0” d/- 3 degrees.
13. Confirm that the Potentiometer is secure in the casting.
14. Proceed with the Calibration Procedure in Section 11.3.
5 MOTOR (480/480E/480E PRO)
nOTE:
Transfer the ferrite loops to the new motor and install them in the same location on the cable.
Removal:
1. Remove bottom cover (refer to section 2.1).
2. Remove motor plug from main PC board in 480/480E (from Motor Board in 480E PRO) and pull
connector through the hole in base frame.
3. Remove the four nuts from the rubber mounts inside the bearing bracket assembly.
4. Take the motor out of the assembly.
5. Remove the rubber coupling from either the motor or ball screw assembly.
Installation:
1. Insert the rubber coupling onto the end of the ballscrew bearing bracket assembly.
2. Place two internal star tooth washers on each of the rubber mounts (part number 13585 motors only).
3. Insert the four motor mount bolts through the base and into the mounting bracket and tighten nuts. (Take
care not to twist the rubber mounts when tightening nuts.)
4. Reattach motor cables.
5. Reinstall the bottom cover.