Technical_reference.pdf - 第57页

Technical Service Manual 57 Revision Dat e: August 2004 CONVEYOR "JERKS" (M OTION IS NOT SMOOT H). 1. The chains ar e dirty and/or dry See: 24 2. Check the drive clutch See: 12 3. Check the exc ess belt / c hai…

Technical Service Manual 56 Revision Date: August 2004

PROBLEMS AND POSSIBLE SOLUTIONS (The most likely cause is listed first)

CONVEYOR PROBLEMS

CONVEYOR WILL NOT RUN.

1. Conveyor drive clutch needs adjustment See: 12

2. Check the on/off/stop circuit (Emergency Stops) See: 2

3. K37 & K38

do not operate See: 4

4. Conveyor has no power See: 3

5. I/O relay has failed or is off See: 6

6. Controller to I/O board signal problem See: 8

7. No signal to DC drive module from I/O Board See: 9

8. Unreliable output from the DC drive module See: 7

9. Conveyor motor does not operate See: 11

10. The conveyor is jammed See: 10

11. ( Reserved for future use )

CONVEYOR STOPS RUNNING.

1. There is a board jammed on the conveyor See: 10

2. There is a conveyor jam See: 10

3. The drive clutch needs adjustment See: 12

4. There is an AC circuit failure See: 13

5. An alarm condition has occurred See: 14

6. The E-stop circuit is causing the stop See: 2

7. Unreliable output from the DC drive module See: 7

8. The conveyor motor has stopped running See:11

9. The controller has had a failure. See: 15

CONVEYOR SPEED IS UNSTABLE.

1. Check the conveyor drive clutch See: 12

2. Check the encoder See: 20

3. Check the drive chain tension See: 21

4. Check sprocket shaft alignment See: 18

5. Check the transfer gear assembly See: 16

6. Check the voltage to the encoder See: 22

7. Check the controller See: 15

8. Unreliable output from the DC drive module See: 7

9. Check the Conveyor motor See: 11

10. Check the encoder drive linkage See: 19

11. Chain may need lubrication See: 10

Technical Service Manual 57 Revision Date: August 2004

CONVEYOR "JERKS" (MOTION IS NOT SMOOTH).

1. The chains are dirty and/or dry See: 24

2. Check the drive clutch See: 12

3. Check the excess belt / chain under the oven See: 23

4. Check the lube / operation of transfer gear See: 16

5. Unreliable output from the DC drive module See: 7

MEASURED SPEED IS NOT EQUAL TO DISPLAYED SPEED.

1. Run the conveyor calibration procedure See: 25

2. Check the encoder voltage See: 22

3. Check the encoder See: 20

4. Check the controller See: 15

Technical Service Manual 58 Revision Date: August 2004

FOR FUTURE USE

CHECK THE “ON - OFF - STOP” CIRCUIT

The conveyor will not run. Check the On/Off/Stop circuits on the oven.

POSSIBLE CAUSES

The on/off/stop circuit consists of the E-STOP switches, K37 & K38 relays, electrical enclosure interlock switches

(optional), F50, F52, F55, and the wiring and terminal strip connections.

HINT: First check the devices physically: the E-STOP switches should be “up”, The electrical enclosure interlock switches

should be depressed, K37 & K38 should be energized, and F50, F52 and F55 should “closed”. (not tripped).

After a physical check, check the connections of the conductors, look for them to be tight and correctly connected. If any

repairs were recently been performed in this area, look for a device that may have been improperly connected when the

work was done.

Finally, check all components' electrical integrity with a volt-ohm meter for correct voltage and internal resistance:

1 E-STOP switches.

2 Electrical enclosure interlock switches (optional).

3. K 37 & K38

4. F50, F52, F55

NOTE: If F50 or F52 trips (opens), the entire oven will lose control power.