Jack k4 Series - Looper Thread Cam and Guide

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Figure 8-3
4、打线凸轮及打线凸轮导线器的调整
①、打线凸轮位置调整
当机针处于最高点时（图 8-4），调整打线凸轮，使之恰好开始打线。
1、Adjustment of thread cam and thread cam guider
①、Hit thread cam adjustment
When needle at the top（Figure 8-4），adjust hit thread cam，make it at the position that
just start hit thread.