JUKI DDL-9000B - ADJUSTING THE FEED TIMING; Feed Timing Adjustment Procedure; THREAD TENSION RELEASE RELEASING MECHANISM; Thread Tension Release Mechanism

24. ADJUSTING THE FEED TIMING
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
2
1
3
3
4
5
DDL-9000B- S DDL-9000B-SH
DDL-9000B-MA
Timing of the feed dog can be adjusted by changing the stop position of vertical feed cam
1
. Adjusting pro-
cedure is as described below.
1) Tilt the sewing machine head and loosen two setscrews
2
in vertical feed cam
1
.
2) Turn vertical feed cam
1
to change the timing of the feed dog. Align graduation
3
on the feed bar driv-
ing 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 releas-
ing 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 mech-
anism can prevent the thread tension from being
changed. )
[How to release]
1) Remove the cap in the machine head and loos-
en 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 p
resser 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.
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