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General| Brand | Pfaff |
|---|---|
| Model | 438 Series |
| Category | Sewing Machine |
| Language | English |
Important safety precautions for operating and servicing the machine.
Procedure to block the machine for precise adjustments using a pin.
Steps for draining oil and removing covers for access to internal parts.
Aligning the needle in the center of the needle hole for straight stitching.
Ensuring the stabilizing rod is parallel to the needle bar for proper operation.
Adjusting stitch width settings, zeroing, and scale accuracy for proper operation.
Ensuring symmetrical left/right needle throws for consistent stitch patterns.
Setting equidistant needle punctures for accurate zigzag stitching.
Calibrating the bottom feed for zero stitch length and proper reverse motion.
Setting the correct feed dog height and ensuring proper lifting motion.
Aligning the hook shaft with the bearing bracket gauge for optimal performance.
Precisely setting hook timing and needle-to-hook clearance.
Final adjustment of needle bar height relative to the hook point.
Calibrating bobbin case opener timing and position for reliable bobbin pickup.
Ensuring thread tension discs separate correctly when the presser bar lifter is engaged.
Procedures for lubricating the zigzag eccentric and verifying hook lubrication.
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