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General| Speed (Max.) | 4000 s.p.m. |
|---|---|
| Max. stitch length | 5 mm (5 s.p.i.) |
| Needle bar stroke | 33.0 mm (1-19/64") |
| Knee lifter clearance | 9 mm (23/64") |
| Foot pressure | 7.2 mm (9/32") |
General| Speed (Max.) | 4000 s.p.m. |
|---|---|
| Max. stitch length | 14 mm (6 s.p.i.) |
| Needle bar stroke | 30.5 mm (1-3/16") |
| Knee lifter clearance | 6 mm (15/64") |
| Foot pressure | 4 mm (5/32") |
General| Speed (Max.) | 3500 s.p.m. |
|---|---|
| Max. stitch length | 5 mm (5 s.p.i.) |
| Needle bar stroke | 35.0 mm (1-3/8") |
| Knee lifter clearance | 9 mm (23/64") |
| Foot pressure | 7.2 mm (9/32") |
General| Speed (Max.) | 3500 s.p.m. |
|---|---|
| Max. stitch length | 5 mm (5 s.p.i.) |
| Needle bar stroke | 35.0 mm |
Connects motor to control box, emphasizing safety precautions and proper grounding.
Adjusts the synchronizer to stop the needle bar at a pre-set position.
Details the correct procedure for attaching a sewing machine needle, ensuring proper orientation.
Explains how to wind thread onto the bobbin, covering tension and winding amount.
Guides the user through the process of threading the sewing machine's upper thread.
Explains how to adjust stitch length and utilize the reverse lever for sewing control.
Details how to adjust the presser foot pressure for different material types.
Covers the adjustment of upper and lower thread tension for balanced stitching.
Explains upper thread tension adjustment based on lower tension and take-up spring.
Describes how to adjust the lower thread tension using the bobbin case mechanism.
Details the process of adjusting oil lubrication for the hook mechanism.
Explains the four steps of pedal operation for controlling the sewing machine's speed.
Provides guidance on managing needle thread when starting to stitch.
Explains how to adjust thread tail length using pretension spring pressure.
Details the steps to operate the thread guide for proper thread management.
Instructions for initial oiling of the machine up to the oil tank position.
Details initial oiling procedures for parts after long idle periods.
Emphasizes checking oil lubrication condition via the oil check window during operation.
Outlines routine cleaning procedures for the feed dog, hook, and filter.
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