Standard Adjustment; Threading The Machine Head - JUKI MF-7800D Series Engineer's Manual

5. STANDARD ADJUSTMENT

(1) Threading the machine head

1. Threading for standard seam
When using more
stretchable thread
(Caution) In case of threading for standard seams, rocking thread take-up thread guide
2. Threading for soft seams
(1) When soft seams are required, change the threading of needle thread and slide the position of looper thread
cam eyelet.
(2) Do not pass needle thread through needle bar thread take-up
take-up to rocking thread take-up thread guide
(3) Other points are same as those of "1. Threading for standard seam".
(Caution) In case of the soft seams, rocking thread
take-up thread guide
Standard Adjustment
When using less
stretchable thread
E
is used.
A
Broken lines
B
C
When covering thread is
excessively loosened =
B
When covering thread is
excessively loosened even
after passing B =
C
. Pass the thread from rocking thread
.
Engraved marker line
1. Adjust the bottom end of left-hand thread guide
to the engraved marker line on the front side.
2. Adjust the position of the hole of right-hand
thread guide to the left.
– 6 –
A when stretcher thread is used
D
When covering thread is
excessively tense =
is not used.
In case of soft seams
Left
Right
D