Grizzly G0484 owner manual Service, Troubleshooting, Motor & Electrical

Troubleshooting

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel- ops. 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
Motor will not	1.	Incorrect mill/drill operation.	1.	Use the spindle direction ON/OFF lever.
start.	2.	Main power panel switch is OFF.	2.	Turn the main power panel switch ON.
	3.	Emergency switch is pushed in.	3.	Rotate emergency switch so it pops out.
	4.	Circuit breaker or fuse has tripped.	4.	Seek an electrician to troubleshoot and repair the
				shop power supply.
	5.	No voltage or open connection.	5.	Test circuit, replace wires and connections as
				required.
	6.	Capacitor is at fault.	6.	Replace capacitor.
	7.	Power switch or magnetic contactor is at	7.	Replace power switch or magnetic contactor.
		fault.
	8.	Transformer or fuse at fault.	8.	Replace transformer or fuse.
	9.	Motor is at fault.	9.	Replace motor.
Fuses or circuit	1.	Short circuit in line cord or plug.	1.	Inspect cord or plug for damaged insulation and
breakers trip				shorted wires.
open.	2.	Short circuit in motor or loose connections.	2.	Inspect all connections on motor for loose or shorted
				terminals or worn insulation.
	3.	Incorrect fuses or circuit breakers in power	3.	Install correct fuses or circuit breakers.
		supply.
Table is hard to	1.	Chips have loaded up on bedways.	1.	Frequently clean away chips that load up during
move.				milling/drilling operations.
	2.	Ways, gibs, lead screw are at fault .	2.	Lubricate ways and lead screw, adjust gibs.
	3.	Gibs are too tight.	3.	Loosen gib screw(s) slightly (Page 27).
Machine is loud	1.	Excessive depth of cut.	1.	Decrease depth of cut.
when cutting.	2.	RPM or feed rate wrong for operation.	2.	Refer to RPM feed rate chart (Page 19) for
Overheats or				appropriate rates.
bogs down in the	3.	Dull cutters.	3.	Sharpen or replace cutters.
cut.
Bad surface fin-	1.	Wrong RPM or feed rate.	1.	Adjust for appropriate RPM (Page 19) and feed
ish when milling.				rate.
	2.	Dull tooling or tool not centered correctly.	2.	Sharpen tooling and/or center tool correctly.
	3.	Headstock is loose.	3.	Tighten column way gib, lock down headstock lock
				levers, and run milling operation with quill fully
				retracted into headstock and locked in position.
	4.	Too much play in gibs.	4.	Lubricate ways and tighten gibs.
	5.	Vise or clamping hardware at fault.	5.	Vise or clamping fixture is worn, loose, or inadequate
				for clamping task.
	6.	Incorrect spindle speed or feed rate.	6.	Incorrect spindle speed or feed rate.
Gear change	1.	Gears not aligned in headstock.	1.	Rotate spindle by hand until gear falls into place.
levers will not
shift into position.

-26- G0484 Gear Head Mill/Drill