JUKI DLN-6390 User Manual

36
(
. THREAD TRIMMER COMPONENTS
1. Checking the receding position of the moving knife and the correcting method
1) Make sure that the power to the sewing machine is
turned OFF.
2) Remove setscrews
1
, setscrews
2
and setscrews
3
.
Then remove hemming binder
4
, auxiliary throat plate
5
and throat plate
6
.
3) Replace the connectors.
• Disconnect connector
Z
from SC-921.
• Disconnect connector
Y
and connect connector
Y
to the detector of SC-921 to which connector
Z
is
connected.
• Remove connector
X
to connect the motor of
SC-921 and the control box.
(Refer to “Wiring diagram of pneumatic and electric
components” on the next page.)
4) Turn ON the power to the sewing machine.
5) Turn the handwheel
7
by hand in the normal direction
of rotation of the sewing machine
A
.
(Normal direction of rotation of the sewing machine
A
is the counterclockwise direction as observed from the
handwheel side.)
6) When the needle bar goes up and the top end of
needle comes higher than the moving knife, depress
the back part of pedal
8
in the direction
B
.
At this time, never depress the front part
of pedal
8
in the direction
C
.
(By depressing the front part of the pedal, the thread
trimmer magnet is turned ON and the roller enters the
thread trimmer cam in the sewing machine.)
7) Then turn the handwheel
7
by hand in the normal
direction of rotation of the sewing machine.
8) Moving knife lever
9
turns counterclockwise in the
direction
D
and moving knife
!0
starts receding in the
direction
E
.
9) When moving knife
!0
has fully receded, the position
where convex
F
of moving knife
!0
aligns with end
G
of the thread pulling plate is the correct position of
moving knife receding position.
The power switch has been turned ON
during the operation of steps 4) through 9).
Never depress the front part of pedal
8
in
the direction
C
.
10) At this time, if the receding amount is not proper,
be sure to turn OFF the power switch of the sewing
machine, loosen moving knife tightening screw
!1
, and tighten moving knife tightening screw
!1
(tightening torque : 3 to 4 N·m) so that convex
F
of moving knife
!0
aligns with end
G
of the thread
pulling plate to adjust the moving knife to the correct
receding position.
＊
Checking the fully receded position of the moving
knife and the correcting operation have been
completed in steps 1) through 10). Be sure to return
the connectors replaced in step 3) and return the
components removed in steps 1) and 2) as well. Then
securely tighten the setscrews.
＊
When installing the throat plate, push it in the direction
of arrow mark
N
and tighten setscrews
3
in the state
that stopper
!4
comes in contact with the frame.
1
2
F
C
B
A
7
2
5
6
3
4
J
8
G
3
!1
9
Moving knife
waiting position
Correct position
where moving knife
has fully receded
H
I
I
E
I
E
D
N
!4
!0
E

JUKI DLN-6390 Specifications

General

Brand	JUKI
Model	DLN-6390
Category	Sewing Machine
Language	English