Paxar 656 / 636 user manual Tcb

Problem		Probable Cause		Corrective Action
Knife stops during cut in stock	1) Check life of blades		1)	If warn and dull, may stall in stock. If
				life is greater than 2 million, replace
				blades.
	2)	Clean cams and lubricate	2)	Make sure oiler is on knife. Instruct
				Operator to oil weekly. Make sure oil
				is available.
	3)	Clutch worn out and can’t stay	3)	Replace Clutch
		engaged
Slight Long and Short Tags	1) Sticking Solenoid		1)	Check gap on the trip arm to clutch body
				must be about .040 inches. If too large,
				solenoid has less force. Check
				assembly of spring and washers. Use
				latest engineering assembly procedure.
				Clean Solenoid.
	2)	Sticking Trip Arm to Clutch Roll	2)	Check for burr on trip arm catching on
		Pin		clutch stop roll pin. File off burr on
				clutch roll pin and/or replace trip arm.
	3)	Clutch has trouble picking up	3)	Clean clutch and replace if not solved
Stock popping in front of knife	1) Slow knife rotation		1) Worn out blades create too much load
				for motor and knife slows down too
				much during cut. Replace Blades.
	2)	Clutch has trouble engaging and	2)	Clean clutch and replace if not solved.
		stock runs into blades
Knife does not cycle	1) Solenoid not engaging		1)	Trip knife solenoid by hand to see if
				knife cycles. If cycles and cuts, check
				cable to solenoid, check solenoid
				adjustments and assembly, check gap
				and replace solenoid if necessary.
	2)	Knife Motor Broken	2)	Replace Knife Motor, good for 10
				million labels by spec
	3)	Clutch total failure	3)	Unlikely, but change if necessary
	4)	Solenoid Drive circuit failure	4)	Replace Cable or TCB
	5)	Knife motor not cycling	5)	Replace Cable or TCB
Continuous Knife cycling	1) Solenoid stuck in		1)	Clean and adjust solenoid.
	2)	Circuit stuck on	2)	Unplug solenoid wires from knife
				module connector and should stop
				cutting. If it does stop cutting, replace
				TCB.

3)Very bad trip arm to stop pin on clutch

3)Unusual, but file roll pin and replace trip arm.

58 • Mechanical Trouble Shooting Users Manual Model 656/636