Adjustment Of The Presser Foot Timing - JUKI PLK-G4030R Technical Manual

7-5. 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 by 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) If turn the eccentric cam (No.2) to the arrow direction "D", the presser foot timing is advanced, and
turn the eccentric cam (No.2) to the arrow direction "F", the presser foot timing is delayed.
(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.
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<1>:Cover <2>:Eccentric cam
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