SunStar SPS/B-1811 SERIES User Manual page 28

C. Adjustment of Presser Foot Adjusting Arm
a) Unscrew location link stopper screw to make space between location link stopper ④ and fixing stud screw of
presser foot motion link ③.
b) After unscrewing fork link joint screw ① and placing stud screw of presser foot link to the right side of presser
foot adjusting arm, fasten stud screw ② of presser foot link tightly.
c) Place the needle bar to the lowest point by turning the hand pulley.
d) Raise the presser bar so that the distance between presser bar handle and presser bar bush is to be 4mm and
fasten the joint screw ① of fork link tightly.
[ Cautoin ]
If there is space between presser bar handle and presser bar bush, interference and noise is occurring during
machine operation. Screws are not fastened tightly after adjustment ; it can cause breakage during operation.
e) Adjust so that location link stopper ④ and fixing stud screw of presser foot motion link ③ get close by turning
stopper screw of location link.
[ Cautoin ]
If fixing stud screw ③ of presser foot motion link and end of the location link stopper ④ did not get perfectly
close, trembling phenomenon occurs during operation and noise can increase.
f) After fastening fork link joint screw ① tightly, check if there is play to vertical direction in presser foot adjusting
arm. Checking fastening status of screws, adjust presser foot stroke.
Presser Foot
Adjusting Arm
④
③
Presser Bar Bush
D. Adjustment of Presser Foot Stroke (Adjustment of Presser
Foot UP/DOWN Motion)
After unfastening stud screw① of presser foot adjusting
arm, placing it to A direction, presser foot stroke increases.
Placing to direction B, stroke decreases.(It is set to 4mm at
the moment of factory shipping).
28
②
9mm
Presser Bar
Holder
①
A
B
[ Fig. 34 ]
①
[ Fig. 35 ]