Jack JK-T1377E - 上线穿线方法（Threading the Machine; 线张力（Thread Tension Adjustment

- 5 -
7.上线穿线方法（THREADING THE MACHINE ）
如图所示的顺序进行穿线，从针孔的前侧向后侧按松线螺母A，把线拉出约60～70mm左
右。（Thread the machine in order of to 21 ustrated and pass the thread
through the needle eye from the front for 60 to 70 mm as you depress nipper
releasing knurted thumb nut A）
8.线张力（THREAD TENSION ADJUSTMENT）
第一线张力螺母是调整钉扣强度用
的，仅能调节极小的张力。
第二线张力调整螺母是调整背面的
紧线程度的，其张力比第一线张力螺母
强，根据使用的机线、布料、纽扣厚度等
情况，进行调整。
向右转动各线张力螺母之后，线张力变
强，向左转动则张力变弱。
Tension post No.1 is used to adjust the thread tension to sew on the
button and a relatively low tension will be enough. Tension post No.2
is used to adjust the thread tension applied to the root of the button
sewing stitches.
This tension must be determined according to the type of thread ,fabric
and thickness of the button and must be higher than that of tension post
No.1.turn the tension nuts clockwise to increase or counterclockwise
to reduce the thread tension .