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7-5-3 Adjustment of the presser foot timing
NOTE
The presser foot up and down movement during the sewing synchronizes with the needle up
and down movement. With changing this synchronized timing to the sewing materials, the skip
stitches can be prevented or the seam tightness can be improved.
For example, the delay of the presser foot timing against the needle movement prevents the
skip stitches especially to the thin materials, and the advance of the presser foot timing can
improve the seam tightness especially to the thick materials.
1) Remove the cover (No.1).
2) Loosen the set screw “C” of the eccentric cam (No.2).
3) Turn the sewing machine pulley be hand and stop the needle bar (No.3) at the lowest position. At
this stage, the set screw “A” of the eccentric cam (No.2) is positioned right beside the center line of
the upper shaft. This is the standard position for the eccentric cam (No.2).
4) Loosen the set screw “A” of the eccentric cam (No.2).
5) Hold the eccentric cam (No.2) and turn the sewing machine pulley slowly by hand. If turn the sewing
machine pulley to the arrow direction “D”, the presser foot timing against the needle movement is
delayed, and it turn the pulley to the opposite direction, the timing of the presser foot is advanced.
6) After the adjustment, tighten the set screw “A” and “C” in turn with slightly pushing the eccentric
cam (No.2) to the arrow direction “E”.
7) Put the cover (No.1) back on the original location.
1)
3)
A
C
2)
E
D
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