JUKI MOL-254 Engineer's Manual page 55

Adjustment Procedures
1. Set the operation box panel to the adjustment screen and
select [BB], hook adjustment mode.
2. Move the hook with the ten key so that the center-to-center
of the needle holes on this side and far side is 69 mm as
shown in Fig. 1.
3. Tilt the machine head and loosen setscrews
removing sensor slit attached to the hook removing unit
to move the sensor slit in the direction of the arrow mark.
Then fix sensor slit
sensor LED lights up.
4. Fix the notch of hook removing shaft sensor slit
to the hook removing motor at the position where the notch
is turned by 180˚ from the sensor.
5. Turn OFF the power once, and re-turn ON the power to
move the hook with the ten key under the hook adjustment
mode. The adjustment is completed if the hook removing
shaft motor sensor slit is within the slant section in the
figure at the moment when the LED lights up.
(Caution) If the slit is outside the aforementioned range,
the hook position may vary. Perform re-
adjustment.
6. Then move the hook up to the adjusted needle width and
perform hook timing adjustment.
at the position where hook removing
48
−
Results of Improper Adjustment
in the hook
attached
−