27
In case that the thread is cut or the cut part of the
thread is not neat, please confirm the cutting part of
the fixed blade. If the bottom of the fixed blade is
worn, sharpen the end of the blade using an oil
whetstone.
[Figure 49]
20) Adjusting thread release
Adjust such that the dish of upper thread tension
controller opens about 1mm when the thread trimming
solenoid is in the operation.
Adjustment is available by loosening the thread release
cable fixing nut and wire. (Refer to Figure 50)
[Figure 50]
21) Adjusting remaining amount of upper
thread
Adjust the remaining amount of upper thread is adjustable
with the auxiliary thread tension adjusting nut.
The remaining thread becomes shorter when you turn it
right, and the thread becomes longer if you turn left.
(Refer to Figure 51)
[Figure 51]
(Caution)
If the gap of the control dish is too narrow, it
invites the shortening of the upper thread causing
a possible thread missing in the next work. If the
gap is too wide, a bad thread tightening caused
because the dish will be always open.
solenoid link fixing screw
open amount 0.5~1mm
0.5mm
thread trimming
following crank
solenoid arm
thread release
cable fixing nut
solenoid base
solenoid link pin
oil whetstone
fixed blade
solenoid base
fixing screw
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