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Adjustment Procedures
1) Loosen setscrews 2 and remove bobbin winder unit 1.
2) Set both zigzag width and stitch base line to the position of "0" in the
hook adjusting mode.
Set the position of the needle to the center
and temporarily tighten it.
Refer to (12) Adjusting the needle-to-hook timing and the needle guard.
3) Set the zigzag width to 8 mm which is factory-adjusted at the time of
delivery, move the needle bar by hand to adjust so that the clearances
of zigzag widths C and D are equal and securely tighten screw 3 in
the needle bar support base shaft connecting stud.
Conditions : Needle enters the center of zigzag width.
: Max. zigzag width (8 mm)
(Caution) Do not flap or strongly press the needle bar at the time of
adjustment.
Adjustment Procedures
1) Loosen the screw, which can be observed through the hole for
adjustment, in the needle bar support base guide shaft with the face
plate attached.
2) Move the needle bar back or forth to adjust so that the needle enters
the center of the needle slot in the throat plate.
3) Fix the needle bar support base guide shaft.
4) Be sure to check the needle throw torque applied to the needle bar
support base.
(Caution)
1. The needle entry position in terms of the longitudinal direction
should be finely adjusted. If the needle bar has to be moved by
a large margin for the adjustment of the needle entry position in
case of replacement of gauges, carry out the adjustment
referring to "(10) Position of the needle bar connection guide".
2. Be sure to check the left/right plays at the needle bar support base.
In the case where there is any extra load applied to the base,
needle throwing action will be affected.
Adjustment Procedures
1) Loosen screw 1 in the face plate.
2) Remove rubber cap 2. Then tighten screw 1 while pressing pin 3 in
the needle bar support base guide located inside the face plate with a
screwdriver.
3) At this time, move the needle bar to the right and left by hand to confirm
that there is neither extra load nor a longitudinal play.
4) If the load applied to the needle bar and the longitudinal play existing at the
needle bar at the rightmost needle throw position differ from those at the
leftmost needle throw position, perform the adjustment by turning pin 3 in
the needle bar support base guide to change the orientation of the engraved
marker dot (toward the direction where the load and play are larger).
(Caution)
1. Be sure to check the longitudinal play at the needle bar support
base. In the case where there is any longitudinal play or extra
load, the needle throwing action will be affected.
2. Refer to (5) Disassembling/assembling the needle bar support
base shaft (asm.) of 4. PROCEDURES OF DISASSEMBLING/
ASSEMBLING.
A = B
A
B
C = D
C
D
21
−
−
Results of Improper Adjustment
™ Thread will not be uniformly tensed
when the needle throws to the right
and left, or thread breakage or
needle breakage will result.
Results of Improper Adjustment
Results of Improper Adjustment
™ When there is a longitudinal play
at the needle bar, a clearance
between the needle and the
blade point of the hook occurs.
As a result, sewing trouble or
worn-out of the blade point of the
hook will result.
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