Woodstock W1772, W1773 owner manual Troubleshooting, Moving parts have come to a complete stop

SERVICE

W1772/W1773 37" Drum Sander

Troubleshooting

This section covers the most common problems and corrections with this type of
machine. WARNING! DO NOT make any adjustments until power is disconnected and			OFF
moving parts have come to a complete stop!
Motor & Electrical
PROBLEM	POSSIBLE CAUSE	CORRECTIVE ACTION
Machine does not start or a	1. Emergency stop push-button is	1. Rotate clockwise slightly until it pops out/replace
breaker trips.	engaged/faulty.	it.

2.Power supply switched OFF or is at 2. Ensure power supply is switched on; ensure power

fault. supply has the correct voltage.

3.Start capacitor is at fault (W1772 3. Test/replace if faulty (W1772 only). only).

4.Motor connection wired incorrect- 4. Correct motor wiring connections.

ly.
5. Thermal	overload relay has 5. Unplug machine, open magnetic switch cover, turn
tripped.	amperage dial on Thermal Protection Circuit Breaker
	to a higher amperage setting.

6.Wall fuse/circuit breaker is blown/ 6. Ensure circuit size is suitable for this machine;

tripped. replace weak breaker.

7.Contactor not getting energized/ 7. Test for power on all legs and contactor operation.

has burnt contacts. Replace unit if faulty.

8.Wiring is open/has high resistance. 8. Check for broken wires or disconnected/corroded connections, and repair/replace as necessary.

9.Emergency stop push-panel is 9. Free push-panel from binding; replace faulty

		stuck/switch is at fault.		switch.
	10.Motor is at fault.		10.Test/repair/replace.
Machine stalls or is over-	1. Feed rate too fast for task.		1.	Decrease feed rate.
loaded.	2.	Workpiece material is not suitable	2.	Only cut wood products; make sure moisture con-
		for this machine.		tent is below 20% and there are no foreign materials
				in the workpiece.
	3.	Run capacitor is at fault (W1772	3.	Test/repair/replace (W1772 only).
		only).
	4.	Belt(s) slipping.	4.	Replace bad belt(s) as a matched set, align pulleys,
				and re-tension.

5.Motor connection is wired incor- 5. Correct motor wiring connections. rectly.

6.Motor bearings are at fault. 6. Test by rotating shaft; rotational grinding/loose shaft requires bearing replacement.

7.Machine is undersized for the task. 7. Use new sandpaper with appropriate grit; reduce the feed rate/depth of sanding.

8.Contactor not getting energized or 8. Test for power on all legs and contactor operation.

has poor contacts. Replace if faulty.

9.Motor has overheated.9. Clean off motor, let cool, and reduce workload.

10.Motor is at fault. 10.Test/repair/replace.

11.Air circulation through the motor 11.Clean off motor to provide normal air circulation. restricted.

Drums run	backwards 1. Two of the power wires are reversed	1. Switch two of the current carrying wires at the main
(W1773 only).	(W1773 only).	power block (W1773 only). (Page 21)

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