GUN and Cable Maintenance, 3D-3 | Lincoln Electric SVM138-A specification

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D-3D-3

	GUN AND CABLE MAINTENANCE
	For instructions on periodic maintenance for the weld-	FIGURE D.1 – SPEED SENSOR MODULE LOCATION
	ing gun and cables, refer to the manual for your specif-	FIGURE D.1 – SPEED SENSOR MODULE LOCATION
	ing gun and cables, refer to the manual for your specif-
	ic model of welding gun.
	PROPER SPEED SENSOR MODULE
	MOUNTING
	The LN-9 GMA Speed Sensor Module is a three lead
	Hall-Effect switch device encased in an externally
	threaded housing. It is screwed into a mounting plate
	on the motor side of the wire drive gearbox. See
	Figure D.1.
	Proper positioning of this module is critical to operation
	of the LN-9 GMA wire feed speed control. If the device
	is not screwed in far enough, the LN-9 GMA motor
	speed could be unstable or run at full speed with no
	control. If screwed in too far it will rub a moving part
	inside the gearbox.
	The module is properly mounted to the gearbox as
	shipped from the factory. If the device is ever removed
	or replaced, proper mounting technique is as follows:
	1. Be sure all power to the LN-9 GMA is shut off at the
	power source.
	2. Check that the module mounting plate is screwed
	securely to the side of the gearbox and seated
	flush against the top surface after being tightened.
	3. Gently screw the module into the mounting plate
	until it just touches and stops against the rotating
	part inside the gearbox.
	4. Back the module out 1/2 turn, then snug the mod-
	ule locknut without rotating the module position.