- 4 -
Needle swing (Parabola)
Standard
When the pattern selection dial is set at 4 (Zigzag), the needle swing should be 0.05 mm or less while the
needle moves down from the needle plate to its lowest position. While the needle moves up from its
lowest position to the needle plate, the needle swing should be 0.15 mm or less. These clearances
should be on both sides of the needle plate hole.
Adjustment
1. Set the pattern selection dial to 4 (Zigzag).
2. Loosen the three set screws on the worm gear.
3. Turn the worm gear to adjust the needle swing.
4. Tighten the three set screws on the worm gear.
Note: Make sure that the biting worm gear aligns with the pattern cam gear.
www.promelectroavtomat.ru
