②、打线凸轮打线量调整（Adjusting the line distance of CAM）
当需要调节底线打线量时，松开紧定螺钉，调节分线片位置，分线片往上移动打线
量减小，分线片往下运动，打线量增加。（图6）When adjusting the base thread
distance, first loose crew and adjust dividing thread plate position. If
dividing thread plate moves up ,the thread distance get less, while vice
versa.(Figure 6)
图6(Figure 6)
紧定螺钉：Set screw，打线量减少：Line drop，打线量增加：Line up，分线片：Line piece
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