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5-10-5 Adjusting the disk opening amount at the time of thread trimming
Adjustment procedure
1. Lower the presser foot lifting lever.
2. Select No. 9 SARA UKASHI (meaning: tension release) of the service mode.
3. Loosen the locknut. Turn the adjusting nut to adjust the retracting amount of the thread tension releasing
link plate so that the top end of claw of the opening arm is aligned with the marker dot on the thread
tension releasing arm.
4. At this time, check to be sure that the opening amounts of the pretension disk, thread tension disk and
base tension are same as those provided when the presser foot lifting lever is raised.
Caution: After adjustment of the opening amounts of each tension control part, lower the
presser foot lifting lever or return the thread tension releasing link plate to its home position to make
sure that those tension control parts are closed.
5-11 Adjusting the needle thread tension
○
Remove the thread tension controller cover.
Adjustment procedure
1. Raise the presser foot lifting lever.
2. Turn the thread tension adjustment dial to bring its "AUTO" section to the top.
3. Prepare SHAPPE Span thread #60 and a tension gauge. Thread the base tension and the tension disk.
4. Lower the presser foot lifting lever. Turn the adjusting nut to adjust the tension so that the tension gauge
gives a reading of 0.49 to 0.59 N.
Thread tension
releasing arm
Opening arm
Align with the
marker dot
Locknut
Adjusting nut
Thread tension
releasing link plate
Adjusting nut
A U
T O
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