– 65 –
9) Adjustment of gap between the moving knife driving arm and
the moving knife driving arm stopper
1. While the state of 8), Moving knife driving arm and initial position of
the moving knife, is maintained, tighten the moving knife driving arm
stopper screw
.
2. Adjust the gap to 0.05 to 0.1mm between the moving knife driving
arm stopper screw
and the moving knife stopper
.
3. Tighten the moving knife driving arm stopper screw nut
.
10) Mounting position of the moving knife return plate
1. Keeping the gap as per 9) Adjustment of gap between the moving
knife driving arm and the moving knife driving arm stopper, make the
moving knife return plate
contact with the return pin
.
2. Tighten the moving knife return plate setscrew
. Unlock the manual
switch of the [solenoid valve] that has been actuated as per 3. herein.
(Caution) If a machine lock occurs in the middle of thread
trimming, confirm the adequacy of adjusting values
specified in 3.-(12)-8), 3.-(12)-9), and 3.-(12)-10).
If any inadequacy is discovered, readjustments are
required.
11) Adjustment of timing for the thread trimming cam
1. Let the sewing machine fall down and loosen the thread trimming
cam setscrew
.
2. Turn the hand wheel by hand and let the hand wheel graduation [L]
coincide with the upper surface of the hand wheel indicator.
3. Manually make the thread trimming cam roller
come in contact
with the cam groove of the thread trimming cam
.
4. Making the thread trimming cam roller
contact with the thread
trimming cam
, turn the thread trimming cam
so that the thread
trimming cam roller
comes in contact with the starting R part of
the cam groove.
5. Fix the thread trimming cam
with the use of the thread trimming
cam setscrew
.
Adjustment Procedure
Results of Improper Adjustment
