– 7 –
3-2. Adjusting the position of the sensor
1) Attach jig to hook . Turn
hook set the jig at the cen-
ter of backlash of hook .
Loosen screws ❻and .
Adjust the position of plate A
❹and plate B ❺.
Adjust the position of the
sensor so that the top surface
of sensor ❶comes in close
contact with the undersurface
of jig plate -1. (Adjustment
of the longitudinal position of
the sensor)
❶❶
❺
❻
❹
-1
2) Turn ON the power to the sew-
ing machine. Turn the pulley
counterclockwise by 45 de-
grees of an angle by hand.
(While the power to the sew-
ing machine is in the ON state,
the rotating hook shields the
laser. It is therefore necessary
to move the rotating hook to
such a position that it does not
shield the laser.)
Positioning point
-2
Adjust the position of the sensor so that the left end face of sensor ❶is aligned with left marker line
-2 of jig . (Adjustment of the lateral position of the sensor)
After the completion of the adjustment, tighten screws .
Irradiate the jig shaft with light from the sensor. Check the irradiation point by observing it from the
upper right side of the sewing machine. Tighten screws ❻when the sensor position allows the light
spot to be aligned with the positioning point on the jig shaft. In the case the light spot is not aligned
with the positioning point on the jig shaft, adjust the longitudinal position of plate A ❹.
