Powermatic instruction manual TROUBLE-SHOOTING 3520A Lathe, Problem Possible Cause Solution

TROUBLE-SHOOTING (3520A Lathe)

PROBLEM	POSSIBLE CAUSE		SOLUTION
Excessive vibration.	1. Defective spindle bearings.		1.	Replace bearings.
	2.	Worm or defective belt.	2.	Replace belt.
	3.	Defective motor.	3.	Replace motor.
	4.	Workpiece warped, out-of-round,	4.	Correct problem by planing
		has major flaw, or was improperly		or sawing, or scrap workpiece.
		prepared for turning.
Motor or spindle stalls.	1. Excessive cut.		1.	Reduce cut depth.
	2.	Defective motor.	2.	Replace motor.
	3.	Excessive belt wear.	3.	Replace belt.
	4.	Improper belt adjustment.	4.	Readjust belt.
Motor overheats.	1. Motor overloaded.		1.	Correct overload condition,
				such as reducing cut depth.
	2.	Improper cooling on motor.	2.	Clean sawdust from fan and
				duct areas of motor.
Motor starts slowly or	1. Low voltage.		1.	Request voltage check from
fails to come up to speed.				power company and correct
				low voltage condition.
	2.	Defective motor.	2.	Replace motor.
Motor fails to develop full	1. Power line overloaded.		1.	Correct overload condition.
power.	2. Undersize wires in supply system.		2.	Increase supply wire size.
	3.	Low voltage.	3.	Request voltage check from
				power company and correct
				low voltage condition.
	4.	Defective motor.	4.	Replace motor.
Tools tend to grab or dig in.	1. Dull tools.		1.	Sharpen tools.
	2.	Tool support set too low.	2.	Reposition tool support height.
	3.	Tool support set too far from workpiece.	3.	Reposition tool support closer
				to workpiece.
	4.	Improper tool being used.	4.	Use correct tool for operation.

Lathe runs at one speed.

1.Electronic AC inverter defective, not programmed properly or loose wiring.

1.Replace electronic AC inverter, reprogram, or check wiring.

Headstock moves when	1. Excessive pressure being applied by
applying pressure with	tailstock (more than 500 lbs. of force)
tailstock.	NOTE: The screw action of the tailstock
	is capable of applying excessive pressure
	to workpiece and headstock. Apply only
	sufficient force by tailstock to hold work-
	piece securely in place. Excessive
	pressure can cause damage to machine.

1.Slide headstock down the left side of the lathe against the stop then apply pressure to workpiece with tailstock.

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