18. 後導針器
後導針器在最接近縫針時，其間隙為 0.05~0.1mm，
打開下結線鈎護蓋，放鬆螺絲調整後導針，
再確實鎖緊螺絲。
18. Needle guard(rear)
18-1 Standard setting position:
Make the standard clearance between the needle
guard(rear) and the left needle to
0.05 – 0.1 mm, when they meet most closely.
Open the looper cover and loosen the screw
to adjust it.
Check the needle does not swing to the right
when the looper moves from the left to the
right while rotating the hand wheel.
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