−40 −
!8
!7
@0
@1
@2
@3
!9
Adjustment Procedures Results of Improper Adjustment
™ If the lateral position of the feed
dog is not correct, the left/right
sides of the feed dog and the
throat plate will wear out.
Heating and abnormal noise will
be produced. Also, the feed
components will wear out quickly
and looseness and bending of
the components will occur. Also,
abnormal noise from the
components will be produced.
™ If the height of the feed dog is
low, the stitch length at the finish
of sewing becomes smaller.
™ If the height of the feed dog is
high, it will cause the return feed,
skipping stitch and defective
chain-off.
™ If the main feed dog, differential
feed dog, and throat plate come
in contact with each other, it will
cause breakage.
™ Loosen screw !8 to adjust the left/right position of the main feed
dog !7 .
™ Loosen screw @2 to adjust the left/right position of the differential
feed dog @1 .
™ Loosen screw !9 and move the main feed dog back and forth
to adjust the longitudinal position of the main feed dog !7 .
™ Loosen screw
@
3 and rotate the eccentric nut to adjust the
longitudinal position of the differential feed dog @1 .
™ Loosen screw @0 to adjust the height of the main feed dog !7
and the differential feed dog @1 .
™ To adjust the maximum stroke of the main feed dog, loosen
screw @4 and rotate spacing stop @5 so that it contacts the pin
@6 when the main feed dog has reached its maximum stroke
and while the throat plate does not contact the main feed dog.
™ To adjust the maximum stroke of the differential feed dog,
loosen screw @7 and enter the stopper pin @8 to the end when
the differential feed dog has reached its maximum stroke and
while the differential feed dog does not contact the throat plate
and the front end of the main feed dog.
From the library of: Diamond Needle Corp
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