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3) Adjusting the Spring on the Upper
Side of the Shuttle
After removing the lower feed plate and the needle
plate from the machine, unfasten the screw of the
spring on the upper side. Then, adjust the spring on
the upper side of the shuttle so that the backside of
the needle and comes to point
direction, and the center of the needle will come to
the middle of interval
adjustment is done, tighten the screw back on firmly.
[ Caution ]
The thread may be disconnected or the thread strand
may be unfastened if there are scratches or if the
surface is rough around the spring groove on the
upper side of the shuttle. Always check the surface
of the spring before operating the machine.
4) Height Adjustment of Feed Plate
Unscrew fixing nut ② located at the end of axis of
air cylinder ① located in the right and left of
upper clamp device, move the cylinder knuckle ③
to cylinder axis, then, amount of rise increases and
moving to the counter direction, the amount of rise
reduces. After moving the cylinder knuckle to
proper location, fix the fixing nut firmly.
[ Caution ]
Unless the amount of rise of upper clamp device
in the right and left make equal, it may become
the cause of damage to the machine.
5) Adjustment of Presser Foot
A. Adjustment of Presser Foot Driving Cam
Place the driving cam that end point of presser
foot driving cam and end of punched mark of
No. 1 joint screw① of cam and the punched
mark of the upper shaft to be matched and
then fasten the joint screw①.
[ Caution ]
If the location of presser foot driving cam is not
proper, timing of rise and descending of presser
foot does not meet and so it may cause collision
of needle bar and presser foot.
104
in the vertical
horizontally. After the
①
Presser Foot
Driving Cam
①
Punched
Mark Point
①
[ Fig. 33 ]
①
②
③
[ Fig. 34 ]
Upper
Shaft
[ Fig. 35 ]
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