Setting The Wire Drive Tension - Forney 242 MIG Manual De Operación

13. Line the wire up in the appropriate top groove of the drive roller, then push the drive tension
arm against the drive roller.
14. Flip the quick release drive tensioner back into position on the drive tensioner arm.
15. Tighten (turn clockwise) the drive tension adjusting knob until the tension roller is applying
enough force on the wire to prevent it from slipping out of the drive assembly.
16. Let go of the wire.
17. Place the spool on the spindle in such a manner that when the wire comes off the spool, it
will look like the top illustration in Figure 10 on page 14. The welding wire should always
come off the top of the spool into the drive mechanism. TECHNICAL NOTE: The purpose of
the drive brake is to cause the spool of wire to stop turning at nearly the same moment wire
feeding stops.
18. Set the Drive Brake tension. Note: It is necessary to release the Drive Tensioner Arm while
you are setting the Drive Brake Tension. Make sure you return the Drive Tension Arm to its
locked position after adjusting the Drive Brake Tension.
a) With one hand, turn the wire spool counterclockwise. This will cause the wire to feed
through the gun assembly continue turning it while adjusting the tension on the spool.
b) With your free hand, tighten (turn clockwise) the drive brake adjustment knob.
c) Stop tightening when drag is felt on the wire spool that you are turning. Then stop hand-
turning the wire spool. NOTE: If too much tension is applied to the wire spool, the wire will
slip on the drive roller or will not be able to feed at all. If too little tension is applied, the spool
of wire will want to unspool itself. Readjust the drive brake tension as necessary to correct for
either problem.
19. Trim the wire sticking out the end of the spool gun to about 1/2" in length.
20. Select a contact tip stamped with the same diameter as the wire being used.
21. Slide the contact tip over the wire protruding from the end of the gun.Thread the contact tip
into the end of the gun and hand-tighten securely.
22. Install the nozzle on the gun assembly. For best results, coat the inside of the nozzle with
anti-stick spray or gel.
23. Cut off the excess wire that extends past the end of the nozzle.
24. Replace the wire spool casing cover and tighten adjustment knob by turning it clockwise.
25. Connect the welder power cord to the AC power source. Turn the welder ON. Set the VOLTAGE
switch.

Setting the Wire Drive Tension

WARNING: ARC FLASH CAN INJURE EYES! TO REDUCE THE RISK OF ARC
FLASH, MAKE CERTAIN THAT THE WIRE COMING OUT OF THE END OF THE
GUN DOES NOT COME IN CONTACT WITH THE WORK PIECE, GROUND CLAMP
OR ANY GROUNDED MATERIAL DURING THE DRIVE TENSION SETTING
PROCESS OR ARCING WILL OCCUR.
1. Open the wire drive cover on the spool gun
2. Pull the trigger on the gun.
3. Turn the drive tension adjustment knob clockwise, increasing the drive tension until the wire
WWW.FORNEYIND.COM 15