Grizzly G0486/G0487 owner manual Troubleshooting, Motor & Electrical

Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support at (570) 546-9663.

Troubleshooting

Motor & Electrical

	Symptom			Possible Cause		Possible Solution
				1.	Limit switch or emergency stop is at fault.	1.	Correct situation that caused limit switch to engage, reset
	Motor will not start.						the emergency stop button.
				2.	Low voltage.	2.	Check power line for proper voltage.
				3.	Open circuit in motor or loose connections.	3.	Inspect all lead connections on motor for loose or open
							connections.
	Motor will not start;			1.	Short circuit in line cord or plug.	1.	Inspect cord or plug for damaged insulation and shorted
	fuses	or	circuit				wires.
	breakers blow.			2.	Short circuit in motor or loose connections.	2.	Inspect all connections on motor for loose or shorted termi-
							nals or worn insulation.
				3.	Incorrect fuses or circuit breakers in power line.	3.	Install correct fuses or circuit breakers.
	Motor overheats.			1.	Motor overloaded.	1.	Reduce load on motor.
				2.	Air circulation through the motor restricted.	2.	Clean out motor to provide normal air circulation.
	Motor stalls (result-			1.	Short circuit in motor or loose connections.	1.	Inspect connections on motor for loose or shorted terminals
	ing in	blown	fuses				or worn insulation.
	or tripped circuit).			2.	Low voltage.	2	Correct the low voltage conditions.
				3.	Incorrect fuses or circuit breakers in power line.	3.	Install correct fuses or circuit breakers.
				4.	Motor overloaded.	4.	Reduce load on motor.
Machine Operations

Symptom					Possible Cause		Possible Solution
Machine			slows		1.	Feed rate too high.	1.	Feed workpiece slower.
when operating.					2.	Depth of cut too great.	2.	Reduce depth of cut.
Loud,		repetitious			1.	Pulley set screws or keys are missing or loose.	1.	Inspect keys and set screws. Replace or tighten if neces-
noise	coming			from				sary.
machine.					2.	Motor fan is hitting the cover.	2.	Tighten fan or shim cover.
					3.	V-belt is defective.	3.	Replace V-belt. Refer to the Maintenance section.
Machine			is	loud,	1.	Excessive depth of cut.	1.	Decrease depth of cut.
overheats			or	bogs	2.	Dull or dirty sanding belt.	2.	Replace or clean sanding belt.
down in the cut.
Rounded workpiece					1.	Excessive depth of cut.	1.	Reduce depth of cut.
edges.
Uneven		thickness			1.	Feed table not parallel to sanding roller.	1.	Adjust the table.
from left to right of					2.	Conveyor belt is worn.	2.	Replace conveyor belt.
board.
Workpiece			slips on		1.	Pressure rollers set too high.	1.	Lower pressure rollers.
feed belt.					2.	Dirty conveyor belt.	2.	Clean conveyor belt.
					3.	Conveyor belt is worn.	3.	Replace conveyor belt.
Straight				strip	1.	Pressure rollers are dirty or damaged.	1.	Clean or repair pressure rollers.
of	notches			on
workpiece.
Snake			shaped		1.	Sanding belt damaged or dirty.	1.	Clean or replace sanding belt.
marks				on
workpiece.

-38- G0486/G0487 Wide Belt Sander