TROUbLESHOOTING | ||
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| Observe all Safety Guidelines detailed throughout this manual |
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PRObLEMS
(SYMPTOMS)
POSSIbLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Drive rolls turn, but wire will not feed of | 1. Gun cable kinked and/or twisted. | |
wire feeding is rough |
| Keep as straight as possible. Inspect |
| cable and replace if necessary. | |
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| 2. | Wire jammed in gun and cable. |
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| Remove wire from gun and cable |
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| — feed in new wire. Note any obstruc- |
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| tion. Replace liner if necessary |
| 3. | Incorrect drive rolls and guide tubes. |
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| Be sure the wire diameter being used is |
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| stamped on drive rolls and guide tubes. |
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| Replace if necessary |
| 4. | Gun cable liner dirty. |
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| Clean liner or replace. |
| 5. | Worn drive rolls. |
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| Replace or reverse split drive roll type. |
| 6. | Electrode rusty and/or dirty. |
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| Replace or electrode if it is rusty. |
| 7. | Worn or improper size cable liner. |
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| Replace cable liner. |
| 8. | Partially flashed, melted or improper |
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| size contact tip. Replace the contact tip. |
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Variable or “hunting” arc | 1. Contact tip worn or incorrect size. | |
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| Replace contact tip. |
| 2. Worn or undersize ground cables or | |
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| poor ground connections. |
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| Inspect — repair or replace as neces |
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| sary. |
| 3. Loose electrode connections. | |
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| Be sure the following connections are |
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| tight: electrode cable to wire feeder and |
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| power source, work cable to power |
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| source and work, gun cable to wire |
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| feeder contact tip to nozzle. |
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Poor arc striking with sticking or | 1. Improper procedures or techniques. | |
weld porosity, narrow and ropy looking |
| See “Gas Metal Arc Welding Guide” |
bead, or electrode stubbing into plate |
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while welding |
| Improper gas shielding. |
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| Clean gas cone. Make certain that gas |
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| diffuser is not restricted. Make certain |
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| that gas cylinder is not empty or turned |
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| off. Make certain gas solenoid valve is |
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| operating and gas flow rate is proper. |
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| Remove gun liner and check rubber |
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| seal for any sign of deterioration or |
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| damage. Be sure set screw in brass |
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| connector is in place and tightened |
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| against the liner bushing. |
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Tip seizes in diffuser | 1. Tip overheating due to prolonged or | |
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| excessive high current and/or duly |
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| cycle welding. |
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| Do not exceed current and duly cycle |
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| rating of gun. |
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| A light application of high temperature |
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| antiseize lubricant (such as Lincoln |
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| E2607 Graphic Grease) may be applied |
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| to tip threads. |
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If all recommended possible areas of misadjustment have been checked and the problem persists,
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 Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
MAGNUM® & MAGNUM® PRO CURVE 200 GUNS
