Barrels

the slave motor in the cabinet, combined with the pull of the torch motor, causes the wire to literally ﬂ oat friction-free through the wire conduit. The 24VDC torch motor is controlled by a 3-3/4 turn potentiometer in the torch handle.

AIR/WATER COOLED

The Prince® XL air cooled systems come standard with a straight air/water cooled barrel assembly. An optional curved air/water cooled barrel assembly (LE P/N KP2298-2, MK P/N 003-2152) is also available. In cases where these barrels need to be extended or the tip threads have been damaged, a Tip Extender (LE P/N KP2244-1, MK P/N 621-0424) can be adapted. The same tips and threads can be used, however a longer Teﬂ on liner (LE P/N KP2226-1; MK P/N 931-0137) is required.

BARREL REMOVAL AND INSTALLATION

To remove a barrel assembly, loosen the patented EZ Lock™ Taper lock nut assy MK P/N 003-2572 3/4 to 1 turn. This will push barrel away from the body far enough so that it may be pulled out of the body.

To replace a barrel assembly, take care not to damage the “O” rings when inserting into the body. Open the drive and idler roll door and seat the barrel assembly until the inlet guide is almost touching the drive and idler roll and the rear face of the barrel is ﬂ ush with the aluminum body block. Tighten taper lock nut assembly ﬁ rmly so that barrel cannot rotate.

BARREL ROTATION

To rotate a barrel assembly, loosen the patented EZ Lock™ Taper lock nut assembly no more than 1 turn. Rotate barrel to the position of your choice and retighten taper lock nut assembly ﬁ rmly so that the barrel cannot rotate.

WARNING:

Do not attempt to weld without the barrel being tightly secured in the torch body, or

damage to the barrel or body may result.

CONTROLS AND SETTINGS

POTENTIOMETER

The pot is located in the bottom of the pistol grip and provides 3-3/4 turns of rotation and up to 750 ipm.

The pot is mounted to one side of a PC board and is held in place by a support plate; both of which have slots that locate and secure the pot in the handles. The other side of the PC board houses the motor connectors and ribbon cable. Locking disks behind the pot knob provides a stop at the mini- mum and maximum pot settings.

TRIGGER, GAS VALVE AND MICRO SWITCH

The torch trigger is designed so that when it is partially depressed, gas ﬂ ow starts via the valve located in the torch body, prior to ignition of the arc. When the trigger is partially released after welding (extinguishing the arc), gas ﬂ ow continues until the trigger is fully released; built-in pre and post gas ﬂ ow.

The micro switch is wired “Normally Open” and secured to the torch block with two (2) screws. An insulator between the torch block and micro switch prevents accidental shorting of the switch leads. The trigger pin reaches through the handle and activates the micro switch just before the trigger bot- toms out on the handle.

Prince XL® - Owner's Manual - Page 6