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Adjustment Procedures Results of Improper Adjustment
◯ In case of the machine with thread trimmer
1. Remove the top cover.
2. Loosen setscrew ① in the alternate vertical movement
adjusting arm.
3. Set alternate vertical movement adjusting arm ① to the
position of 73 to 74 mm from end face ② of the machine arm,
and assemble it so that its end face is flush with the end face
of alternate vertical movement changer shaft ③ in the lateral
direction.
4. Securely tighten the setscrew in the alternate vertical
movement adjusting arm.
5. Set the alternate vertical movement dial to the minimum, and
install the top cover.
6. Turn the alternate vertical movement dial and check that the
numeral on the dial and the amount of alternate vertical
movement are proper each other.
1. Set the stitch dial to “0” mm.
2. Turn the handwheel to check that amount of vertical
movement of walking foot ① is almost equal to that of presser
foot ② .
3. If the respective amounts of vertical movement are different,
loosen setscrew ③ in the top feed rear arm to make the
respective amounts equal.
Adjust the amounts to nearly A = B.
When the amount of vertical movement of walking foot is greater :
1) Loosen the setscrew in the top feed rear arm in the state that
the walking foot is slightly raised and press the walking foot
to the feed dog.
2) Tighten the setscrew, and turn the handwheel to check the
amount of the vertical movement.
● Make the amount of the vertical
movement of walking foot greater
than that of presser foot in
accordance with the sewing
products.
• Sewing of sponge or the like
• Sewing of the material with
stepped section
● When the amounts of alternate
vertical movement of walking foot
and presser foot are excessively
different from each other :
• Stitch length pitch in terms of the
graduation of dial will change.
• Slightly decrease the number of
revolution of the motor since feed
force is deteriorated.
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