Presser Foot Adjustment - SunStar SJS/A-PS/A User Manual

7.3) Presser Foot Adjustment

1) Set the end of the presser foot driving cam at the center
of the upper shaft marked line. Set the cam's marked
line to overlap the upper shaft's marked line. Then
fasten the tightening screw ①.
If the presser foot driving cam is not properly positioned, the up/down movement timing of the
presser foot may not be right. This may cause the clash between the needle bar and the presser
foot.
Caution
2) Presser Bar Height Adjustment
Adjust the presser bar holder to make the presser bar
protrude 24mm. After confirming that the needle
passes through the center of the presser foot, fasten the
tightening screw ①.
Tighten the presser bar screw
If the pressure is too high, it may cause deformation of the presser bar and cause problems in
machine operation.
Caution
3) Adjustment of Presser Foot Adjusting Arm
ⓐ Loosen the position link stopper screw and create space between the position link stopper ④ and the hinge screw
for presser foot driving link fixing ③.
ⓑ Loosen the fork link screw ① and place the presser foot link hinge screw ② at the right side of the presser foot
adjusting arm. Then tightly fasten the presser foot link hinge screw ②.
ⓒ Turn the hand pulley to locate the needle bar at the lowest position.
ⓓ Lift the presser bar to set the distance between the presser bar holder and the presser bar bushing at 4mm and
tightly fasten the fork link screw ①.
24
① ① until the pressure is about 40~45Kgf/㎠ ㎠ .
Tightening
screw
Presser bar
Presser bar
holder
Presser foot