TIMING
OF
THE VIBRATING PRESSER
FOOT
This
is the
normal
timing
when, turn the balance wheel toward you, after
lowering the presser bar lifter, the vibrating presser foot should reach the
feeder earlier than the needle eye comes to, and when the needle raises,
the
vibrating
presser foot should
leave
the feeder after the needle eye has
left
the
feeder.
This is due to the reason that the vibrating presser foot must tightly hold
the goods while the needle is
passing
the goods for
avoiding
irregular
stitches.
To adjust this, set the lift of the alternating presser feet to equal, loosen
the two screws (3,
Fig.
27)
and adjust the rotating position of the cam (4,
Fig.
27) faster or slower as may be desired, and tighten the screw.
ADJUSTING
THE
THREAD
CONTROLLER
SPRING
Normally the thread controller spring (2,
Fig.
13) should hold slack of the
upper thread until the needle reaches to the goods, and it should pause
while raising of the needle and passing of the upper thread through the
bobbin
case.
For more controller action on the thread, loosen the stop screw (3,
Fig.
13)
and
move the stop (4,
Fig,
13) to the right.
For less action, set the stop to the left. Then tighten the screw.
To strengthen the tension of the spring, loosen the serrated nut (5,
Fig.
13), loosen the screw (6,
Fig.
13) and turn the tension stud (7,
Fig.
13)
slightly to the left with a screw driver, or to lighten the tension, turn to
the
right.
Then tighten
the
screw
and
nut.
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