29
1) Adjustment of needle thread tension
[ Warning ]
Turn the power switch off before adjusting tension.
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 37.
[ Figure 37 ]
Use the needle thread guide ③ when using stretchable
threads such as synthetic thread and the loop of needle
thread is unstable.
It is a standard setting to bring the center of the needle hole
of the needle bar take up ② against the upper side of the
needle thread guide when the needle bar is at its lowest
position.
The height of the needle bar guide can be adjusted by
loosening the screw ④.
88
Fine-tuning of the sewing machine
①
[ Figure 38 ]
③
②
④
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