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General| Brand | Singer |
|---|---|
| Model | Centurion 121D200A |
| Type | Electronic Sewing Machine |
| Built-in Stitches | 200 |
| Automatic Needle Threader | Yes |
| Drop Feed | Yes |
| Free Arm | Yes |
| LCD Screen | Yes |
| Warranty | 25-year limited warranty |
Details on lubricating the sewing hook race via an oil reservoir and indicator window.
Testing hook lubrication using paper and adjusting the oil metering screw.
Detailed guide on routing the thread through various machine components for operation.
How to adjust stitch length using regulating screws and the reverse stopping block.
Adjusting the pressure applied by the presser foot for optimal feeding.
Adjusting clearance between needle and hook point for proper timing.
Setting thread clearance and aligning hook point for proper timing.
Aligning timing marks on feed lifting and arm shafts for synchronized operation.
Centering the feed dog in throat plate slots and ensuring no contact.
Adjusting the check spring's height for proper thread tension release.
Adjusting the thread tension using the tension stud and thumb nut.
Adjusting the tension release mechanism based on presser foot lift.
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