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DLF-82
®
PROBLEM
Inconsistent wire feeding or
wire not feeding but drive
rolls turning.
Wire feed speed
consistently operates at the
wrong value. The speed
changes when the wire feed
speed knob is adjusted.
The motor runs at max WFS
and there is no change when
the wire feed speed knob is
adjusted.
Variable or "hunting" arc.
When the trigger is pulled,
the wire feeds slowly.
Poor arc starts with sticking
or "blast-offs", weld
porosity, narrow and ropy
looking bead.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
6. Improper gun liner, tip, drive
rolls and/or inner wire
guide.
7. Incorrect tension arm
pressure on the drive rolls.
8. The spindle brake is too
tight.
9. Worn drive roll.
1. The wrong gear is installed
in the wire drive.
2. The brushes on the motor
are worn.
1. The tachometer is
connected improperly.
2. The tachometer has failed.
1. Wrong size, worn and/or
melted contact tip
2. Worn work cable or poor
work connection.
3. Wrong polarity.
4. The gas nozzle is extended
beyond the contact tip or
the wire stickout is too long.
5. Poor gas shielding on
processes requiring gas.
The Run-In is set to a setting
other than "OFF".
Improper procedures or
techniques.
RECOMMENDED COURSE OF ACTION
6. Verify the proper parts are installed.
7. Adjust the tension arm per the Instruction Manual. Most
electrodes feed well at a tension arm setting of "3".
8. Verify the spool of wire moves with minimal effort.
1. Install the proper pinion gear in the wire drive.
2. Replace the motor/gearbox assembly.
1. Verify all of the tachometer leads are properly connected.
2. Replace the motor and tachometer assembly.
1. Replace the contact tip.
2. Verify all work and electrode connections are tight and that the
cables are in good condition. Clean/replace as necessary.
4. Adjust the gas nozzle and shorten the stickout to ½ to ¾ inches.
5
Use the set-up Push-button to turn Run-in OFF.
See "Gas Metal Arc Welding Guide" (GS-100)
E-3
TROUBLESHOOTING
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