23
AZ8600SD
6.4 Looper thread tension for double chainstitch
6.Adjustment of sewing machine
◆ Align the eye of the double chaining looper
thread eyelet ③ with the surface ② of the
double chaining looper thread take-up ① when
being a level with the straight line A.
Position the thread retaining finger ④ 1 mm
above the eye of the looper thread eyelet ③ .
◆ To set the standard position of the double
chaining looper thread eyelet ③ , position the
center of the slot in the center of the screw ⑤ .
● To loosen the looper thread tension, move the
looper thread eyelet in the direction
“L”.
● To tighten the looper thread tension, move it
in the direction
“T”.
◆ At the standard timing of the looper thread
take-up, the looper thread take-up starts tak-
ing up the looper thread when the needle starts
lowering from the highest point.
Loosen the screw of the cam to this adjustment.
Set the thread retaining finger in the center
of double looper thread take-ups when tighten-
ing the screw of it.
Fig. 6-6
1 ㎜
①
②
④
⑤
③
Ｔ
Ｌ
A
