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18. Adjustment value of balloon
Feed timing
When performing balloon stitch, carry out the adjustment
referring to the adjustment values described below.
Feed driving eccentric cam: Standard timing as factory-adjusted at the time of shipment.
Feed rocking eccentric cam: Standard timing as factory-adjusted at the time of shipment.
[Adjusting the looper thread cam]
Adjust so that thread comes off from the highest point of looper thread cam
when the top end of left needle
is
aligned with the underside of looper
while the needles are coming down. Then, tighten setscrews
.
Looper thread cam timing: Looper thread comes off the looper thread cam in the middle between
the lower end face and upper end face of the looper.
[2-needle balloon stitch without top covering]
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the fol-
lowing work after turning the power off and ascertaining that the motor is at rest.
Thread
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