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| 16. TROUBLESHOOTING | ||||
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| Cause |
| Check |
| Remedy |
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| Needle plate |
| Needle plate position | Adjust the forward/back position of the needle plate |
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| so that the needle is in the center of the needle |
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| hole. |
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| - |
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| Bisect | 4014Q |
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| Burr on the screw hole | Polish with buff. |
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| edge (in event of uneven |
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| material feeding) |
| Check the chamfered side |
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| finishing |
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| (Needle plate cross section) |
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| 4015Q |
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| Upper | thread | Needle strikes | upper | Refer to | 102, 103 |
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| trimmer assembly | thread trimmer |
| trimmer”. |
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| Cutter |
| Clearance | between | Install the cutter so that the clearance between the |
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| needle bar and cutter | needle bar and the cutter is 0.3 mm. |
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| * The cutter release section of the needle bar |
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| should be at a right angle to the cutter. |
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| 0.3 mm |
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| 74 |
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| 4016Q |
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Cause | Check |
| Remedy | Page | |
Cutter | Installation | position of | Install the cutter so that its edge is aligned with the | 74 | |
| cutter |
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| top of the needle plate. | |
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| Cutter blade |
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| If blade is worn or chipped, sharpen it or replace it. | 4 |
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| Replace with the special needle plate (optional). | |
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| Damage | to | cutter | Replace any parts that are damaged. |
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| mechanism parts |
| Tighten any loose screws. | - | |
| Loose screws |
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Cutter solenoid | Check for a disconnected | Connect the cords. | - | ||
| cord. |
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Cutter power | Memory switches |
| If the material is heavy and difficult to cut, use | 79 | |
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| memory switch No. 00 to increase the cutting force | |
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| of the cutter. |
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104 |