8-6. Troubleshooting - Stud Gun
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| Trouble |
| Remedy | ||
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Hang up - Stud looks like it’s sitting on | Check alignment of the foot. | ||||
a pedestal with an hour glass shape |
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Service the gun to ensure lift/release actions are functioning properly. | |||||
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Undercutting or lack of fillet | Too little plunge. Increase amount of stud extending past end of ferrule or spark shield. | ||||
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| Too little weld time or current. Check Section 7 for base line power recommendations. | ||
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Splatter or BB’S emitting from the weld | Too much plunge. Decrease amount of stud extending past end of ferrule or spark shield. | ||||
zone. |
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Dampener Required. If you have a dampener the dampener may have worn out and need replace- | |||||
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| ment. See optional equipment in Section 12. | ||
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| Too much Current or Time. Check Section 7 for base line power recommendations. | ||
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Stud breaks off and weld zone looks | Not enough weld current or time. Check Section 7 for base line power recommendations. | ||||
”crystalized” |
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Bubbles in weld fillet | If you are attempting short arc you may not be able to eliminate this condition. To improve this situa- | ||||
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| tion shorten time and increase current. If the results continue to be unsatisfactory then you may need | ||
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| to add a shielding gas. | ||
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| Check gas flow/type of shielding gas. | ||
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| If using flux loaded studs, check to make sure there is a flux load present in the end of the stud. | ||
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No lift | Check gun coil connections. | ||||
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| Check for gun coil short or open. There should be 19 ohms of resistance in the gun coil. | ||
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| Check adjustable core and make sure it is not bottomed out (turned into far clockwise). | ||
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| Check trigger circuit for opens and shorts. | ||
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Short stud and cant get enough to ex- | Adjust the internal stop in the chuck. | ||||
tend past the ferrule |
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Arc Extinguishes, or just get a tiny arc- | Too much lift. Review set up procedures in Section 5. | ||||
but no weld |
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Check ground path from the power source. All joints must be very tight. | |||||
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No weld | Broken weld cable. | ||||
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| Broken or bad ground cable/connection. | ||
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| Check gun lift. | ||
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Gun shaft does not move freely when | Dirt is binding the mechanism. Service gun | ||||
compressed by hand |
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Gun spindle is sloppy and has allot of | Front bearing may be worn out or missing. Replace bearing. | ||||
free play |
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Front cover may be loose. Tighten nuts. | |||||
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