131
(1) Positioning the hook
1) After the completion of the adjustment of the needle bar
height, adjust so that the blade point of the hook comes
to the center of the needle at the height of the “2” of
timing gauge 1 which has been supplied as accessories.
2) At this time, the blade point of the hook should
slightly come in contact with the needle when the
needle guard does not touch the needle.
(2) Confirmation
Bring the needle to the leftmost position of the zigzag
stroke at the time of the standard zigzag width of 8
mm, and confirm that the top end of the needle eyelet
is spaced 0.2 to 0.5 mm away from the blade point
of the hook. If the zigzag width of 10 mm is used or
the shape of indented part of the needle is different
from that of indented part of the needle at the time of
delivery, re-adjust the height of the needle bar.
(3) adjusting the needle guard
1) Maximize the zigzag width. Bend the needle guard
to adjust so that the needle does not come in contact
with the blade point of the both at the leftmost and
rightmost positions of the zigzag stroke. At this time,
adjust the clearance provided between the needle
and the blade point of the hook to 0 to 0.05 mm.
2) The needle guard functions to keep the needle away
from the blade point of the hook, thereby preventing
damage to the blade point of the hook. Whenever
you have replaced the hook with a new one, be sure
to adjust the position of the needle guard.
When thread breakage has occurred, there is a case where thread is caught in the hook.
Be sure to perform sewing after removing the thread caught in the hook.
8-8. adjusting height of the needle bar
0 to 0.05 mm
WarNING :
to protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
WarNING :
to protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
8-9. adjusting the needle-to-hook timing and the needle guard
w
1) Set the zigzag width to “0”. Bring the needle to the
center of the zigzag stroke.
2) Remove the presser foot, throat plate, semicircle
plate and feed dog.
3) Place a semicircle plate on the plane, to which the
throat plate is to be attached, of the bed. Loosen
setscrew
2
, and adjust so that from the top
surface of semicircle plate
A
to the bottom end of
the needle bar is as high as “1” of timing gauge
1
.
1. thickness of the semicircle plate is different
from that of the throat plate. Be sure to use
the semicircle plate when adjusting the
height of the needle bar. Be sure to perform
the adjustment with zigzag width set to
zero and with the needle positioned at the
center of the zigzag stroke.
2. use the timing gauge on which the
indication “E” is engraved which has
been supplied as accessories. (Part No.
22536502)
A
q
A
q
