How To Check The Amount Of Rise Of The Second Thread Tension Disc; How To Adjust The Amount Of Rise Of The Second Thread Tension Disc - JUKI DDL-9000A Engineer's Manual

Adjustment Procedure

1. How to check the amount of rise of the second thread tension disc

(1) Set the thread take-up lever slightly in front of the upper dead
point.
(2) Raise the presser.
(3) The standard amount of the rise of the second thread tension
disc is 0.5 to 1mm when the picker
and left.

2. How to adjust the amount of rise of the second thread tension disc

<When increasing the amount of rise>
Loosen the thread tension release wire fixing screw
the thread tension release wire
<When decreasing the amount of rise>
Loosen the thread tension release wire fixing screw
the thread tension release wire
(Cautions) After adjustments, tighten the thread tension release
wire fixing screw
is pushed to the right
to the right.
to the left.
assuredly.
– 53 –
Results of Improper Adjustment
o If the amount of rise of the second
thread tension disc
the needle thread length becomes
short at the time of thread trimming
and this can be a cause of thread
entanglement and needle thread
castoff errors at the beginning of
sewing.
and move
and move
is too small,