JUKI MO-1000 Series Service Manual page 43

adjustment Procedure
Checking items:
1 Thread tension adj. knob
2 Thread tension gear
* Using Junior Spun thread #90 or FUJIX King Polyester Spun #90,
check that the thread tensions are the numeric values shown below.
(Scale mark on the knob "4")
Standard tension table
Left-hand
needle thread
Scale
0.39±0.05N
mark on
the knob
(40±5g)
"4"
How to perform adjustment:
○ Set thread tension adjustment knob 1 at scale mark "4" (position of
the mark on the left side).
○ Lift the thread tension gear fixing claw 3 . Adjust the thread tension
by moving thread tension gear 2 with a Phillips screwdriver.
The tension is increased by turning the gear clockwise. It is de-
creased by turning the gear counterclockwise.
Caution: If thread tension gear fixing claw 3 is lifted excessively,
the claw can break.
Right-hand Upper looper
needle thread thread
0.15±0.03N 0.11±0.03N
(15±3g) (11±3g)
–
Results of Improper adjustment
Lower looper
thread
0.10±0.05N
(10±5g)
If the thread tension deviates from
the standard adjustment value,
sewing failures can be caused
when carrying out sewing with the
thread tension described in the
Instruction Manual.
If the thread tension is excessive-
ly high, thread breakage can be
caused.
39
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