MK Products Prince XL - Manual (Page 11)

Prince ® XL/Spool Gun Owner's Manual - Page 4
onto shaft with the wire coming off the bottom of the spool. Release the
brake assembly to rest on the wire surface.
Replace the spool cover; making sure that the opening is over liner.
Note: The brake assembly is designed to automatically control spool
drag and keep the wire from jumping off the spool.
Disassembly of Prince XL/Spool Gun
Remove the trigger pin with punch and remove the trigger.
Remove the six (6) handle screws and the spool adapter if installed.
Remove the barrel from the gun, loosen the barrel taper lock assembly and
slide towards the cup. Leave the barrel inserted in gun the body.
Pull the handles apart.
Section B Operation
General Description
The 24 Volt DC gun motor is controlled by a 3-3/4 turn potentiometer
recessed in the pistol grip. The gun trigger is so designed that when it is
partially depressed, gas flow starts via the valve located in the gun body -
prior to ignition of the arc. When the trigger is partially released after welding
(extinguishing the arc), gas flow continues until the trigger is fully released.
Built-in pre and post gas flow.
Barrels
The Prince XL comes standard with a straight barrel assembly (for both
air and water cooled models). An optional curved barrel assembly is also
available. In cases where these barrels need to be extended or the tip
threads have been damaged, a tip extender can be adapted. The same tips
and threads can be used, however a longer Teflon liner is required.
Barrel Removal and Installation
To remove a barrel assembly, loosen the patented EZ Lock ® Taper lock nut
assembly. 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, push the barrel assembly into the gun body
until it clicks to a stop. To assure proper seating of the barrel, open the drive/
idler roll door in the top of the handle. The rear face of the barrel should now
be flush with the gun body. Take care not to damage the “O” rings when
inserting into the body. Tighten taper lock nut assembly firmly 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 firmly so that the barrel cannot rotate.
WARNING:
Do not attempt to weld without the barrel being tightly secured
in the gun body, or damage to the barrel or body may result. Failure to
take such precaution will void your warranty.
Controls and Settings
Potentiometer
The potentiometer is located in the bottom of the pistol grip and provides
3-3/4 turns of adjustment for up to 800 ipm.
The potentiometer is mounted to one side of a PC board and is held in place
by a support plate. Both the potentiometer and the support plate have slots
that locate and secure the potentiometer in the handle. The other side
of the PC board houses the motor connectors and ribbon cable. Locking
disks behind the potentiometer knob provides a stop at the minimum and
maximum potentiometer settings.