2) Turn vertical feed cam 1 to change the timing of the feed dog. Align graduation 3 on the feed bar driving arm with engraved marker line 4 on the feed

driving shaft.

• Turn vertical feed cam 1 in the direction of ( + )

/ Increases the feed timing.

• Turn vertical feed cam 1 in the direction of ( – )

/ Decreases the feed timing.

* Standard value of the engraved marker line on the feed eccentric cam

The position of graduation 3 in the standard state :

9000B- S and 9000B-MA : Engraved marker line 4

9000B-SH : Engraved marker line 5 (+20

25. THREAD TENSION RELEASE RELEASING MECHANISM

WARNING :

Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.

By means of the thread tension release releasing mechanism, sewing can be performed without slackening the needle thread tension even when the presser

foot is lifted during sewing.

(Even when the presser foot is slightly lifted at the thick overlapped section by the knee lifter, this mechanism can prevent the thread tension from being

changed. )

(1) How to release

1) Remove the cap in the machine head and loosen thread tension release changeover screw 1 using a hexagon wrench.

2) Fix screw 1 on the top of thread tension release changeover plate 2 .

The thread tension disk does not rise even when the presser foot is lifted, and the needle thread tension is not loosened. (The thread tension disk rises only

when thread trimming is performed.)

(Caution) Do not use screw 1 at any position other than the top or bottom position of the thread tension release changeover plate.

* The screw has been factory-set to the bottom position at the time of delivery.

* In case of the machine with wiper, remove the wiper unit (two setscrews) to adjust.

)

– 12 –

DDL-9000B- S

DDL-9000B-SH

DDL-9000B-MA

Tabla de Contenido