– 17 –
Adjustment Procedures
Results of Improper Adjustment
1) Amount of alternate vertical movement
1. Remove the top cover.
2. Loosen setscrew
4
in the vertical adjusting arm.
3. Adjust the position of vertical adjusting arm
1
to 73 to 74 mm
from edge
2
of the machine arm and assemble it so that it
aligns with the edge of vertical change base
3
in the lateral
direction.
4. Securely tighten setscrew
4
in the vertical adjusting arm.
5. Set the alternate vertical dial to the minimum and attach the
top cover.
6. Turn the alternate vertical dial and check to be sure that the
scale of dial and the amount of alternate vertical movement
are correct.
Increase the vertical stroke of the
walking foot in accordance with the
sewing products.
™
Sewing sponge material or the
like
™
Sewing material with overlapped
sections
2) Alternate momentum
1. Set the stitch dial to “0”.
2. Turn the handwheel to make sure that the amount of alternate
vertical movement of walking foot
1
and presser foot
2
is
almost equal.
3. When the amount is not equal, loosen setscrew
3
in the top
feed rear arm and adjust so that the amount should be equal.
Adjust the amount almost to A = B.
™
When the amount of alternate vertical movement of the walking
foot is larger than that of the presser foot :
1) Loosen setscrew
3
in the top feed rear arm in the state that
walking foot
1
is raised a little, press walking foot
1
to the
feed dog.
2) Re-tighten setscrew
3
in the top feed rear arm and turn the
handwheel to make sure of the amount of alternate vertical
movement.
Adjust the vertical stroke of the
walking foot so that it is larger than
that of the presser foot in accordance
with the sewing products.
™
Sewing sponge material or the
like
™
Sewing material with overlapped
sections
When the alternative vertical
strokes of the walking foot and
presser foot are considerably
different
™
The stitch pitch is different from
the value set by the dial.
™
Decrease the number of revolution
of the motor a little since the feed
efficiency is decreased.
