Adjustment Of The Presser Foot Timing - Mitsubishi PLK-E0504 Technical Manual

7-6-3. 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 setscrew "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 setscrew "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 setscrew "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 if turn the pulley to the opposite direction, the timing of
the presser foot is advanced.
(6) After the adjustment, tighten the setscrew "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
－25－
A
D
E
2
C