Checking The Receding Position Of The Moving Knife And The Correcting Method - JUKI DLN-6390 Manual De Instrucciones

(. THREAD TRIMMER C�MP�NENTS
1. Checking the receding position of the moving knife and the correcting method
3
6
5
1
C
B
8
!0
E
E
I
I
Correct position
Moving knife
waiting position where moving knife
has fully receded
N
!4
36
2
2
4
J
A
G
F
E
I
H
D
!1
3
) Make sure that the power to the sewng machne s
turned OFF.
2) Remove setscrews 1 , setscrews 2 and setscrews 3 .
Then remove hemmng bnder 4 , auxlary throat plate
5 and throat plate 6 .
3) Replace the connectors.
• Dsconnect connector Z from SC-92.
• Dsconnect connector Y and connect connector Y
to the detector of SC-92 to whch connector Z s
connected.
• Remove connector X to connect the motor of
SC-92 and the control box.
(Refer to "Wrng dagram of pneumatc and electrc
components" on the next page.)
4) Turn ON the power to the sewng machne.
5) Turn the handwheel 7 by hand n the normal drecton
of rotaton of the sewng machne A .
(Normal drecton of rotaton of the sewng machne A
s the counterclockwse drecton as observed from the
handwheel sde.)
6) When the needle bar goes up and the top end of
needle comes hgher than the movng knfe, depress
the back part of pedal 8 n the drecton B .
At this time� never depress the front part
7
of pedal 8 in the direction C .
(By depressng the front part of the pedal, the thread
trmmer magnet s turned ON and the roller enters the
thread trmmer cam n the sewng machne.)
7) Then turn the handwheel 7 by hand n the normal
drecton of rotaton of the sewng machne.
8) Movng knfe lever 9 turns counterclockwse n the
drecton D and movng knfe !0 starts recedng n the
drecton E .
9) When movng knfe !0 has fully receded, the poston
where convex F of movng knfe !0 algns wth end
G of the thread pullng plate s the correct poston of
movng knfe recedng poston.
The power switch has been turned �N
during the operation of steps 4) through 9).
Never depress the front part of pedal 8 in
the direction C .
0) At ths tme, f the recedng amount s not proper,
be sure to turn OFF the power swtch of the sewng
9
machne, loosen movng knfe tghtenng screw
!1 , and tghten movng knfe tghtenng screw !1
(tghtenng torque : 3 to 4 N·m) so that convex F
of movng knfe !0 algns wth end G of the thread
pullng plate to adjust the movng knfe to the correct
recedng poston.
＊ Checkng the fully receded poston of the movng
knfe and the correctng operaton have been
completed n steps ) through 0). Be sure to return
the connectors replaced n step 3) and return the
components removed n steps ) and 2) as well. Then
securely tghten the setscrews.
＊ When nstallng the throat plate, push t n the drecton
of arrow mark N and tghten setscrews 3 n the state
that stopper !4 comes n contact wth the frame.