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Adjustment of Sewing Machine
1) Adjustment of Needle Thread Tension
When the tip of [the needle thread take-up①] is 52mm
away from the center of [the screw②], and the needle bar is
at the highest position, [Part a] of [the needle thread take-up
①] becomes horizontal.
This is a standard needle thread tension.
If you desire to raise the needle thread tension, move [the
needle thread take-up①] in the Y direction. If you desire to
lower the needle thread tension, move the take-up in the X
direction.
To make this adjustment, loosen [the screw②].
If more adjustment is needed, loosen [the screw③] and
check the thread tension, while moving the position of [the
thread eyelet④]
When the thread eyelet is moved in the Y direction, the
tread tension will increase. When it is moved in the X
direction, the thread tension will decrease.
The standard setting is to set the distance between the
middle of [the screw③] and the upper tip of [the thread
eyelet④] at 8mm.
[ Figure 29 ]
①
[ Figure 30 ]
③
④
②
52mm
3mm
Y
Y
a
X
X
For some types of threads, looping is not an easy thing to
do. Wrong loops may make it difficult for the looper to pass
needle thread loop and cause skipped stitches.
In such case, pull the needle thread through the auxiliary
tension-adjusting device of the needle thread ① as shown in
figure 31.
[ Figure 31 ]
①
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