Pfaff select 1520, Service Manual

Page: 39 / 106

37
17. Adjustment of needle penetration in needle plate slot
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:
z
Remove presser foot.
z
Insert a new needle.
z
Set stitch width adjustment dial 70 to "0" (fig. 32).
z
Set needle position adjustment dial 79 to "center".
z
Turn the handwheel and check the centered position of the needle.
Adjustment:
z
Loosen the three screws 75 on the zigzag-stitch unit by just 1/8 of a turn.
z
Turn the handwheel until the needle point is level with the surface of the needle plate (fig. 31).
z
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.
z
Tighten the three screws 75.
Cross-check:
z
The needle must be exactly in the center of the needle plate slot.