Table of Contents
Advertisement
3. LOOPER STROKE/TIMING
a) Remove the right and left cloth clamp plate. Set the sewing select dial to "S/O".
b) Start the machine and push the emergency button after the needle works a few stitches.
c) Switch off the main switch for safety.
d) Rotate the hand pulley clockwise(see from the back side) with hand until the needle bar comes to the
lowest position as inside stitches and measure the needle bar height. After measuring, add 2.5mm as
standard looper stroke/timing.
(For example : needle bar lowest point 10.2mm ＋ looper stroke/timing 2.5mm = 12.7mm)
e) Rotate the hand pulley until the needle bar comes to the looper stork/timing point which is
measured above d).
A) Adjustment for the left looper :
When the needle bar is inside stitching for the left looper, loosen the screw (A) and rotate the looper
connecting rod (B) until the left looper's tip comes to the center of the needle. After adjust it, tighten the
screw (A) softly.
B) Adjustment for the right looper :
Rotate the hand pulley so that the needle bar works to the outside stitching for right looper, and continue
it until the needle bar comes to the looper stroke/timing point. Loosen the screw (C) and move the looper
link (D) up or down until the right looper's tip comes to the center of the needle. After adjust it, tighten
the screw (C) softly.
Continue above adjustment until each loopers tip come to the center of needle when the needle bar comes to
each looper stroke/timing point. After achieving both loopers stroke/timing, tighten the screw (A) and (C)
firmly. Switch on the main switch, and press the light and left foot switch at same time for returning all
positions to original position.
Left looper
Needle lowest position
Needle bar
(C)
Measure the needle bar height
at the lowest position, and
plus 2.5mm.
(D)
Looper link
0.1mm
(B)
4
Right looper
(A)
Looper connecting rod
Advertisement
Table of Contents
