16. TROUBLESHOOTING
-. Uneven seams (7) …… Loose thread end at end backtack
Cause |
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Backtack shape | Check | the | backtack | Set the value for parameter No. 68 to 1.0. |
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| shape |
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| * If the value is set to 1.0, the rear tack will change. |
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| 45 |
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| 1.0 |
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| 4004Q |
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Cause |
| Check |
| Remedy |
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Backtack shape | Check | the | backtack | Set the value for parameter No. 68 to 1.0. |
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| shape |
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| * If the value is set to 1.0, the rear tack will change. |
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| 45 |
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| 1.0 |
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| 4004Q |
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Uneven | material | Work clamp pressure | Increase work clamp pressure. |
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feeding |
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| * The standard height of the adjustment screw is |
| 74 |
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| approximately 30 mm, so tighten it further than |
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| this. |
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| Work clamp |
| When using knit material, replace with the |
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| clamp and needle plate. |
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| Upper | thread | scissors | Adjust to an appropriate opening timing. |
| 76 |
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| opening timing |
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| Upper | thread | scissors | Apply grease to the inclined face of the opening |
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| operation |
| cam. |
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| Lower | thread | clamp | Adjust so that the lower thread clamp plate opens |
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| opening timing |
| when the feed mechanism moves 6 – 7 mm. |
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| Front and rear tack sections of material gets stuck in needle hole |
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Cause |
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| Remedy |
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Start backtack | Number of start backtack | Use parameter number 40 to reduce the number of |
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| stitches |
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| stitches in the front tack. |
| 41 |
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| * If the material is soft, it can be effective to set the |
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| number of stitches to 0. |
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Rear tack |
| Rear tack vector shape | Use parameter number 37 to set the rear tack |
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| vector shape to a rectangle. |
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| * Setting the vector shape to a rectangle can be |
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| effective when the width is less than the bar tack |
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| width. |
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Needle plate |
| Needle plate |
| When using knit material, replace with the |
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| needle plate. |
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| Replace with a needle plate with a smaller needle |
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| hole. |
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97 |