Adjustment Of Needle Penetration In Needle Plate Slot On Pfaff 1540 - Pfaff Select 1520 Service Manual

25. Adjustment of needle penetration in needle plate slot on Pfaff 1540

Requirement:
At straight stitch setting with needle position "center" the needle must be exactly in the center of the
needle plate slot (fig. 30).
Check:
Remove presser foot.
Insert a new needle.
Set stitch width adjustment dial 70 to "0" (fig. 32).
Set needle position adjustment dial 79 to "center".
Press straight stitch and zigzag stitch button on the automatic utility-stitch unit.
Turn the handwheel and check the centered position of the needle.
Adjustment:
Loosen the three screws 75 on the zigzag-stitch unit by just 1/8 of a turn.
Turn the handwheel until the needle point is level with the surface of the needle plate (fig. 31).
Move the zigzag-stitch unit to the left or right until the needle is exactly in the center of the needle plate
slot (fig.32).
Note:
The zigzag-stitch unit should now be parallel to the arm shaft and clear it by 3.0 mm.
Tighten the three screws 75.
Cross-check:
The needle must be exactly in the center of the needle plate slot.
49