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
Intermittent wire feed when trigger | 1. Drive roll has become galled. | 1. | Remove and then clean or | |
is pulled. |
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| replace drive roll. |
| 2. | Wire has become kinked along its | 2. | Manually pull wire slowly thru gun |
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| feed path. |
| until unkinked wire emerges. |
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Frequent birdnesting or kinking of | 1. Wire shavings/lubricant is build- | 1. | Clean cable or replace cable | |
wire in the gun cable. |
| ing up in the cable. |
| liner. |
| 2. | Cable liner is too large for wire | 2. | Install the smallest possible liner |
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| size. |
| which is specified for the wire |
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| being used (i.e. use |
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| liner instead of a |
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| when welding with 1/16” diameter |
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| wire. |
| 3. | Mechanical resistance to wire | 3. | If using a reverse bend gun tube, |
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| feeding is too large. |
| try welding with a non reverse |
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| bend product. |
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Frequent occurrence of contact tip | 1. Improper welding parameters or | 1. | See welding wire literature for | |
burnback. |
| technique (example: ESO is too |
| proper settings. |
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| short). |
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| 2. | Wire may be feeding intermittent- | 2. See symptoms on intermittent or | |
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| ly. | sluggish wire feed. | |
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Poor weld bead appearance. | 1. Improper electrode polarity. | 1. Reconnect machine’s welding out- | ||
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| put to proper electrode polarity. | |
| 2. | Improper welding parameters or | 2. See welding wire literature for | |
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| technique. | proper settings. | |
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Wire feeder runs or begins feeding | 1. Defective trigger (contacts closed | 1. | Replace trigger assembly. | |
wire without pulling the gun trigger. |
| or dirty). |
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| 2. | Defective (closed) trigger circuit | 2. | See machine’s instruction manu- |
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| in the welding machine. |
| al. |
| 3. | Trigger lead(s) inside gun cable | 3. | Damaged control leads along |
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| are shorted together or commonly |
| cable; repair if possible. |
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| shorted to either welding or |
| Otherwise, replace gun cable. |
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| accessory switch circuits. |
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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.