5-3. Brush Inspection And Replacement
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2 |
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| 1/4 in (6 mm) |
| Minimum Length |
| 5/8 in (16 mm) |
| New Length |
Tools Needed: | Replace |
| Damaged Brushes |
1Motor
2Brush Cap
Remove brush cap.
3 Brush
Replace brush if it becomes chipped or broken, or if less than 1/4 in. (6.4 mm) of brush material is left. Do not include spring boss as part of the 1/4 in. measurement.
Install brush so that curved surface on end of brush matches curve of motor, and secure with cap.
Repeat procedure for other brush.
5-4. Troubleshooting
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| Trouble | Remedy | ||
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Wire feeds erratically. | Adjust drive roll pressure by turning pressure adjustment knob(s) 1/4 turn clockwise until wire stops slip- | |||
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| ping. Check gun contact tip for obstructions. |
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| Check size of drive roll (see Section |
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| Replace drive roll if worn (see Section |
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| Clean drive roll, and check wire spool hub tension. |
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| Check and secure motor plug connection (see Section |
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| Align drive rolls (see Section |
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Wire stops feeding while welding. | Align drive rolls (see Section | |||
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| Replace motor. |
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Motor runs slowly. | Reduce load. | |||
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| Check for correct input voltage. |
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Motor runs at full speed regardless of | Have Factory Authorized Service Station/Service Distributor check digital wire drive motor Tachometer | |||
wire speed setting. | board and encoder disc. | |||
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Operation Module servo light on, Teach | Check and secure servo warning light(s) connection. | |||
Pendant display on, servo warning |
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light(s) off |
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| Replace burned out servo warning light(s). |
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