JUKI IP-100A Engineer's Manual page 37

Adjustment Procedures
1) Put the pressser foot 4 in the presser bar 3, and insert screw
1, At this time, do not tighten screw 1.
2) Turn the handwheel until the feed dog 5 descends under the
top surface of the throat plate.
3) Applying a pressure onto the presser foot, tighten screw 1
with the sole of the presser foot closely fitted on the top surface
of the throat plate.
3) Apply a pressing pressure onto the presser foot with the presser
lifting lever lowered and tighten screw 1 with the sole of presser
foot 4 closely fitted on the top surface of the throat plate.
4) When using presser foot other than presser foot 4 which is
delivered as standard, there is a case where a clearance is
provided between presser foot 4 and the throat plate according
to presser foot 4 to be used. At this time, fix presser foot 4to
be used with screw 1. Then loosen screw 2 and lower presser
foot 4.
5) When tightening screw 2, tighten it so as to lower it in the
downward direction.
6) Adjustment of the orientation of presser foot 4 can be
performed by loosening screw 2 and turning presser bar 3.
Adjustment Procedures
1) Loosen screws 1.
2) In the state that bobbin winder lever 4 is tilted in the direction
A, slightly press bobbin winder driving wheel 2 to rubber ring
3 of the bobbin winder unit.
3) Temporarily tighten screws 1 and in the state that bobbin
winder lever 4 is tilted in the direction A, turn bobbin winder
shaft 5 by hand, and check that the bobbin winder shaft does
not rotate.
If bobbin winder driving wheel 2 and rubber ring 3 shift with
each other, adjust again.
4) Securely tighten screws 1.
Results of Improper Adjustment
™ If the presser foot is not closely
fitted on the throat plate, the
material will not be fed straight
and the material will flop causing
thread breakage and stitch
skipping.
™ When tightening screw 2 so as
to lift upward, the lifting amount
is decreased even when the
presser foot is lifted with the
presser lifting lever or the like.
™ Be sure to set the orientation of
the presser foot to the front.
When the orientation is tilted, the
needle hole does not align with
the throat plate and the needle
and the presser foot may
interfere with each other.
Results of Improper Adjustment
™ When turning the bobbin winder
shaft by hand in the state that
the bobbin winder lever is tilted
in the direction A, if the bobbin
winder shaft rotates, the bobbin
thread is not completely wound
up.
™ If the bobbin winder driving
wheel and the rubber ring are
strongly pressed with each
other, the service life of the
rubber ring is shortened.
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