Looper Thread Tension - Yamato VF2400 class Instruction Manual

6. Adjustments

6.3 Looper thread tension

6.3.1 Looper thread tension
The figures show the supporting plate.
Align the eyes of the thread take-up eyelets ③④ with
mark ② of the cast-off plate ① as standard.
Loosen the screws ⑥ and move each eyelet to adjust it.
● To increase take-up amount, move the thread take-up
eyelets frontward.
● To decrease take-up amount, move the thread take-up
eyelets forward.
ＡＤＶＩＣＥ
Too much take-up of the looper thread can cause skip
stitch.
For stretchable thread:
Move the thread take-up eyelets ③④ frontward fully and
never thread it through the supplementary tension disc ⑤ .
6.3.2 Position of looper thread take-up
Fig. 6-8 shows the looper thread take-up seen from the needle bar side.
When the left needle lowers from the highest point and meets a half of the looper, the thread comes off from the
top of the looper thread take-up ⑥ . Loosen the screws ⑦ to adjust it.
thread
⑥
Fig. 6-8
VF2400
⑦
26
①
②
Decrease
Increase
④
Fig. 6-6
⑤
④
Fig. 6-7
1/2
Fig. 6-9
③
Decrease
Increase
⑥
for stretchable thread
③