Singer 20U33 - Needle Sidewise Movement Adjustment (Zigzag)

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
2. Set stitch width regulator for straight stitching and check (visually)
whether the relationship between needle and rotating hook is as shown in
Fig. 2 (at center and left needle positions) just when needle Tises from
its lowest position.
3. Be sure the clearance between needle and hook
point is O - 0.05 mm (Fig. 3) regardless of left,
center, or right needle pasitions. Excessive
clearance may result in skip stitching.
Adjustment should be made in the same way as
explained in paragraph A, "TO TIME THE ROTATING
HOOK".
TO ADJUST SIDEWISE MOVEMENT OF NEEDLE
WHILE IN TI-!E MATERIAL (ZIGZAG STITCHING)
0 - 0.05
Hook Point
Needle
Fig. 3
When zigzag stitching, the needle must not move sidewise while its point
is still in the material, or in the needle hole in throat plate. The-needle
should make its upward or downward movement only after completing its swing
to the left or right as shown in Fig. 4.
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Wrong
Fig. 4
Fig. 5-a
Fig. 5-b
If the needle continues its swing even as it enters the needle hole in
throat plate, or when it begins to rise as shown in Fig. 5-a and 5-b, such
condition should be corrected by making the following adjustments.
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