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Adjustment procedures
Results of Improper adjustment
When performing balloon stitch, carry out the
adjustment referring to the adjustment values de-
scribed below.
(Caution) Balloon stitches may not be formed
smoothly according to the type of
thread and fabric.
[2-needle balloon stitch without top covering]
①
Feed timing
Feed driving eccentric cam : Retard the timing
Feed rocking eccentric cam : Retard the timing
* Refer to "4.-(14)-3. Adjusting the feed locus".
②
Looper thread cam timing
Looper thread comes off the looper thread cam
❷
in the middle
between the lower end face and upper end face of the looper
❹
.
[Adjusting the looper thread cam]
Adjust so that the looper thread comes off the looper thread cam
❷
when the top end of the lowering left needle
❸
comes to the middle
between the lower end face and upper end face of the looper
❹
when the lowering left needle. Then, fix the looper thread cam with
setscrews
❶
.
③
Hauling amount of the looper thread cam
The position 6 mm lower than the standard position
(Standard: Aligns with the upper marker line)
④
Matchstick height
Matchstick height
Right needle
17 mm
Left needle
29 mm
⑤
Needle bar thread take-up thread receiver
The needle bar thread take-up thread receiver
❺
aligns with the top
end of the needle bar thread take-up when the needle bar is in its
lower dead point.
⑥
D claw (standard: B claw)
⑦
Differential feed ratio
Slightly stretch the material.
