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28. Adjustment of the stop for the left needle position on Pfaff 1540
Requirement:
When all push buttons are switched off, the needle must be approx. 0.2 mm further left than the widest
zigzag stitch.
The needle must not touch the needle plate.
Check:
z Set stitch width adjustment dial to "5".
z Set needle position adjustment dial to "center".
z Press the zigzag stitch button.
z Rotate the handwheel until the needle moves downward on the left side and is at a position of roughly
1 mm above the needle plate (fig. 56).
z Press the button for the buttonhole bartack.
The needle should now move approximately 0.2 mm to the left.
Adjustment:
z Set stitch width adjustment dial to "5".
z Set needle position adjustment dial to "center".
z Press the zigzag stitch button.
z Loosen screw 84 (fig. 38).
z Push stop 85 to a position 0.2 mm from the crank 90.
z Tighten screw 84.
Cross-check:
z Press the zigzag stitch button and the button for the buttonhole bartack alternately and check whether
the needle moves by approx. 0.2 mm without touching the needle plate.
