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Adjustment Procedures
1) Hand lifter
1. Loosen clamping screw 1 in the presser bar bracket to set the
hand lifter 2 to the raised state.
2. Adjust the lifting amount to 9 ± 0.3 mm. At this time, the
adjustment can be easily performed when inserting a thing of
9 mm thick between the top surface of the throat plate and the
bottom face of the presser foot.
3. Tighten clamping screw 1 in the presser bar bracket. Move
the presser foot to the left or the right and tighten the screw in
the state that the presser foot does not interfere with the walking
foot.
2) Automatic presser foot lifter
1. Loosen cylinder nut 1 and adjust the screwing amount of
cylinder connecting screw 2 so that the height from the top
surface of the throat plate to the bottom surface of the presser
foot becomes 16±0.5 mm.
™ Turn in the direction A / Lifting amount is increased.
™ Turn in the direction B / Lifting amount is decreased.
After the adjustment, check that there is a clearance of 0.5 to
1.5 mm between automatic presser foot lifter lever A 3 and
thread tension release plate 4 when the presser foot is
lowered.
Results of Improper Adjustment
When the lifting amount is higher
than the specified value :
™ The presser foot is held raised
from the top surface of the throat
plate even when the hand lifter
is returned to its home position.
When the lifting amount is lower
than the specified value :
™ The presser foot is not sufficiently
raised and the working property
may be deteriorated.
When the lifting amount is higher
than the specified value :
™ The top end of the needle bar
interferes with the walking foot
and the walking foot may be
damaged when the presser foot
is raised.
When the lifting amount is lower
than the specified value :
™ The presser foot is not sufficiently
raised and the working property
may be deteriorated.
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