底面线张力调节（图 18、19、20）/ Bottom Thread Tension Adjustment（Fig 18 19 20 - Jack H2 Series Product Instruction Manual

16.底面线张力调节（图 18、19、20）/ Bottom thread tension adjustment（Fig 18 19 20）
线勾装配位置的调节，关系到缝纫质量的优
劣。线勾装配位置，应适合缝料与缝纫条件。
左 侧
线 勾
位 置
缝 料 厚 料
缝纫机的正常线迹应该如图a，如果线迹不正
常，会出现缝料起皱和断线现象，应对底、面线
的张力加以调节。使之达到正常的线迹。
a、如果面线太紧，底线太松, 则应逆时针旋
转夹线螺母，放松面线的压力。或用小号螺钉起
子旋紧梭皮螺钉，加大底线的压力。
b. 如果面线太松，底线太紧，则应顺时针旋
转夹线螺母，以加大面线的压力或用小号螺钉起
子，旋松梭皮螺钉，减少底线的压力。
c.如出现图 d、e 的线迹，也可以参照上述
方法加以调节
The adjustment of the assembly position of the
thread hook is related to the quality of sewing. The
hook assembly position should be suitable for sewing
material and sewing conditions.
Left
Wire hook
position
Sewing Thick
material material
The normal stitches of the sewing machine
should be as shown in Figure a. If the stitches are
abnormal, the sewing material will wrinkle and
thread breakage. The tension of the bottom and
upper threads should be adjusted. Make it reach the
normal stitch.
a. If the upper thread is too tight and the bottom
thread is too loose, turn the thread clamping nut
counterclockwise to relax the pressure on the upper
thread. Or use a small screwdriver to tighten the
bobbin screw to increase the pressure on the bottom
thread.
b. If the upper thread is too loose and the
bottom thread is too tight, turn the thread tension nut clockwise to increase the pressure on the upper thread or
use a small screwdriver to loosen the bobbin screw to reduce the pressure on the bottom thread.
c. If the traces in Figure d and e appear, you can also adjust them by referring to the above method
中 间 右 侧
中厚料 薄 料
middle right
thin
Medium thickness
material
material
10
18
a
b
c
d
e