The returning force of the thread take-up spring is insufficient.
挑线弹簧的回复力过强。
Decrease the tension and increase the stroke of the thread take-up spring.
调弱挑线弹簧的张力，调大动作行程。
The patented looper thread take-up put on the front of body, to clean the winding and adjustment easily.
前置式底线分线盘：专利底线分线盘外置于机体前侧，可轻易清除绞线、调整容易。
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