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General| Type | Mechanical |
|---|---|
| Number of Stitches | 14 |
| Stitch Length | 4 mm |
| Stitch Width | 5 mm |
| Buttonhole Type | 4-step |
| Free Arm | Yes |
| Needle Threader | No |
Detailed steps for disassembling the bobbin winder, upper shaft, and needle-presser module.
Instructions for reassembling the bobbin winder, upper shaft, and needle-presser module.
Detailed steps for disassembling the main frame and covers of the sewing machine.
Detailed disassembly instructions for the bobbin winder, upper shaft, and needle-presser module.
Detailed assembly instructions for the bobbin winder, upper shaft, and needle-presser module.
Procedure for adjusting the timing belt tension for optimal machine operation.
Steps to adjust the tension of the motor belt for proper power transmission.
Procedure to adjust the timing of the needle's swing motion.
Adjusting the front/back and left/right positions of the feed dog.
Procedure to adjust the vertical height of the feed dog.
Adjusting the upper thread tension for optimal stitch quality.
Adjusting the length of left and right stitches for buttonholes.
Adjusting the lower thread tension for optimal stitch quality.
Diagnosing and resolving issues where the sewing lamp does not turn on.
Troubleshooting steps for a main motor that does not turn or rotates slowly.
