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General| Brand | Pfaff |
|---|---|
| Model | 900/51 |
| Category | Sewing Machine |
| Language | English |
Essential safety instructions for machine operators and technicians, emphasizing proper usage and maintenance.
Explanation of visual safety symbols and potential hazards to ensure user and equipment protection.
Guidance on the application of adjustments within this service manual, covering scope and methodology.
List of essential tools, gauges, and accessories needed for performing machine adjustments.
Definitions of common abbreviations and symbols used in technical documentation and during adjustments.
Step-by-step guide for initial adjustment of the control cam, ensuring proper timing and function.
Procedure for adjusting the roller lever to ensure correct engagement with the control cam.
Setting the pawl mechanism to the correct position relative to the control cam for precise operation.
Adjusting the engaging solenoid and related components for proper engagement and timing.
Procedure for setting the release lever to achieve the specified clearance with the control cam.
Setting the engaging lever's distance from the control cam for correct operation.
Aligning the thread catcher tip to the needle and ensuring clearance during movement.
Setting the front reversal point of the thread catcher relative to the bobbin case finger.
Fine-tuning the control cam based on hook plate position and thread catcher distance.
Setting the distance between the retaining spring and the roller lever.
Adjusting the clearance between the knife edge and the needle for proper thread cutting.
Ensuring perfect thread trimming in the catcher cutout on both sides.
Setting the tension release mechanism for proper thread tension and release.
Ensuring correct machine positioning after sewing interruption and trimming.
Instructions for safely removing and reinstalling the machine's control unit.
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