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General| Type | Industrial |
|---|---|
| Stitch Type | Lockstitch |
| Needle System | DB x 1 |
| Max Stitch Length | 5 mm |
| Motor Type | Clutch motor |
| Application | Light to medium weight fabrics |
Key operational and design characteristics of the sewing machines.
Details specific differences and capabilities for models 281-1, 281-3, and 281-21.
Instructions for positioning and leveling the machine base with its oil reservoir.
Steps for attaching and setting the knee lifter lever and stop dog.
Guidance on filling the oil reservoir and checking the oil flow regulator.
Procedures for cleaning the machine and advice on optimal operating speeds.
Information on choosing the correct needle type and how to set it properly.
Detailed steps for guiding the thread through the upper mechanism of the sewing machine.
Instructions for removing, winding, and replacing the bobbin, and threading the bobbin case.
How to regulate needle and bobbin thread tension and presser foot pressure.
Procedure for setting and adjusting the desired stitch length.
Adjusting the lower needle bar bushing and needle bar height for correct timing.
Aligning the sewing hook with the needle to ensure proper loop pickup.
Setting the precise gap between the needle and the hook point.
Adjusting the position finger for correct thread guidance relative to the bobbin case.
Modifying the needle guard to prevent contact with the hook or bobbin case.
Setting the check spring height/tension and feed dog height for various fabrics.
Ensuring correct feed dog movement and adjusting the presser bar height.
