3 Operation
3.1 Needles, threads and gimps
Needles
Needle system: 558 / 579
Needle sizes: Nm 80-120 (558) / Nm 90-125 (579)
according to the type of sewing thread, fabric and
sewing equipment (E-No.).
Attention!
When changing over from one needle system to the other the distance
between looper and needle and the adjustment of the needle
protection have to be checked imperatively (see service instructions).
Threads
The look of the buttonhole is essentially influenced by the sewing
thread used.
Threads of synthetic fibre or silk threads can be used as needle and
looper threads.
The look of the buttonhole is essentially influenced by
–
the thread used.
–
the use of different upper and looper thread sizes.
Gimps
The gimp is meant to stabilize the buttonhole and to give it a
relief-type appearance at the same time.
It should have the following features:
–
not too thick, but supple and tight
–
even thickness
The threads mentioned in the following table are recommendations
only. Depending on the sewing equipment (E-No.) and the material
also other threads and thread sizes may be required.
Subclass Type and size of upper Type and size of looper Type and size of lower
thread thread gimp
580-112000 Polyester fibre thread, Polyester fibre thread, not necessary
schappe-silk spun schappe-silk spun
580-312000 70/3 70/3
80/3 70/3
580-141000 Poly-Poly 80/2 Poly-Poly 80/2 Poly-Schappe 15/3
580-151000
580-321000
580-341000
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