Jack JK-T1790 Manual page 22

把线张力螺丝○
向右转动，底线张力变强，向左转动，底线张力变弱。
2
Turning tension adjust screw ○
counterclockwise will decrease the tension.
使用化纤缝纫机线时，请把张力稍稍减弱，棉纱线时请稍稍加强。因为本机装有防止空转弹簧，所以装
上旋梭之后的线张力请再调强 0.05N 左右。
Adjust the bobbin thread tension to lower for synthetic filament thread, and to higher for spun
thread. The thread tension is higher by approximately 0.05N when the bobbin case is set to the
hook since idle-prevention spring is provided.
调整了底线张力之后，请确认存储器开关的上线张力设定。
When bobbin thread tension is adjusted, check the needle thread tension setting
of the memory switch.
6.梭壳的安装方法 Installation of bobbin case
警告
WARNING:
为了防止突然起动造成人身事故，请关掉电源，确认马达确实停止转动后再进行操作。
To protect against possible personal injury due to abrupt start of the machine, be sure to start
the following work after turning the power off and ascertaining that the motor is at rest.
1. 如果梭壳没有在规定的位置，缝纫后梭心会飞出来，上线绕到旋梭轴上。
If the bobbin case is out of the predetermined position, it can jump out from
the hook to cause the needle thread to tangle on the hook shaft. Check to be
sure that the bobbin case is properly installed in the correct position.
2. 因为标准旋梭和干式旋梭的形状不一样，所以不能通用。
There is a difference in the shape of bobbin case between the standard hook and
the dry one. They have nothing in common with each other.
clockwise will increase bobbin thread tension, and turning it
2
1) 拨起梭壳抓手。
Lift up and hold bobbin case latch lever between two fingers.
2) 插入中旋梭轴○ ，关闭抓手。梭壳被按到一定位置会听到喀喳的响声。
1
Push the bobbin case into the hook so that it is supported by the hook
shaft ○ and then snap in the latch lever. ress the bobbin case until
1
the predetermined position is reached, and it will click.
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