6.Adjustment of sewing machine
6.3 Needle thread tension for double chainstitch
◆ To set the standard position of the needle thread eye-
let (left) (double chain) ③, adjust the needle thread of
double chain on a level with the eyelet (left) ③ when
the needle bar is at the highest point.
Loosen the screws ④ to adjust it.
◆ To set the standard position of the needle thread eyelet
holder (double chain ) ①, position the center of the
slot in the center of the screw ②.
◆ To set the standard position of the needle thread eye-
let (right) (double chain) ⑦, align the portion ⑥ with
the eye ⑧ at the most front position of the needle
thread pull-off ⑤ when the needle thread eyelet holder
(double chain) and the needle thread pull-off are at the
standard position.
Loosen the screw ⑨ to make adjustment.
● To loosen the needle thread tension, move the nee-
dle thread eyelet and the needle thread pull-off in
the direction “L”.
● To tighten the needle thread tension, move them in
the direction “T”.
Fig. 6-4
Fig. 6-5
②
①
④
③
⑨
⑤
⑤
⑥
⑦
⑧
⑦
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