TROUBLESHOOTING

E-3

 

E-3

Observe Safety Guidelines

detailed in the beginning of this manual.

TROUBLESHOOTING GUIDE

 

 

 

 

 

 

 

 

PROBLEMS

 

 

POSSIBLE AREAS OF

 

 

(SYMPTOMS)

 

 

MISADJUSTMENT(S)

 

 

 

 

 

 

FEEDING PROBLEMS

 

 

No wire feed when gun trigger is

 

 

1.

If the wire drive motor is running

 

 

pulled. Fan runs, gas flows and

 

 

 

check to see if the correct wire

 

 

machine has correct open circuit

 

 

 

is in the machine.

 

 

voltage (28 vdc maximum) – weld

 

 

 

 

 

 

output.

 

 

2.

If the wire drive motor is running

 

 

 

 

 

 

make sure that the correct drive

 

 

 

 

 

 

rolls are installed in the

 

 

 

 

 

 

machine.

 

 

 

 

 

3.

Check for clogged cable liner or

 

 

 

 

 

 

feeding problems.

 

 

 

 

 

 

 

 

 

Wire feed speed motor runs very

 

 

1.

Make sure that the wire speed

 

 

fast. Weld output, gas flow and fan

 

 

 

control is not set at maximum.

 

 

operate normally.

 

 

 

 

 

 

 

 

 

 

 

 

 

The wire begins to feed but shuts

 

 

1.

Wire spool friction brake adjust-

 

 

off after a short time, and will feed

 

 

 

ment set too tight. Check adjust-

 

 

again for another short interval only

 

 

 

ment of the wire spool friction

 

 

if the trigger is released and

 

 

 

brake . See "Friction Brake

 

 

pressed again. (See description

 

 

 

Adjustment" in the "OPERA -

 

 

under wire feed overload protec-

 

 

 

TION" section of this manual.

 

 

tion).

 

 

 

 

 

 

 

 

 

2.

Idle roll pressure adjustment set

 

 

 

 

 

 

too high. Check adjustment of

 

 

 

 

 

 

the idle roll pressure. See "Wire

 

 

 

 

 

 

Threading" in The "OPERA -

 

 

 

 

 

 

TION" section of this manual.

 

 

 

 

 

3.

Damaged or poorly maintained

 

 

 

 

 

 

wire feed system.

 

 

 

 

 

1.

Check for clogged or damaged

 

 

 

 

 

 

cable liner, contact tip, and guide

 

 

 

 

 

 

tubes. Replace any damaged or

 

 

 

 

 

 

excessively worn parts.

 

 

 

 

 

2. Perform "ROUTINE AND

 

 

 

 

 

 

PERIODIC MAINTENANCE" as

 

 

 

 

 

 

described in this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RECOMMENDED COURSE OF ACTION

Contact your local Lincoln Authorized Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to Perform the tests/repairs safely, contact your

LOCAL AUTHORIZED LINCOLN ELECTRIC FIELD SERVICE FACILITY for assistance before you proceed.

SP-135 PLUS

Page 30
Image 30
Lincoln Electric IM788 manual Feeding Problems

IM788 specifications

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