Operating instructions

1.3 Subclasses
579-112000 With short trimmer for the upper and bobbin threads. The
bobbin-thread trimmer is located in the throat plate, enabling the
thread to be severed very close to the material. For taper, round and
cross tacks. Can also be used for double-chainstitch eyelets in
conjunction with appropriate sewing apparatus.
Fitted as standard with an electropneumatic upper thread catcher.
No lower gimp.
579-121000 With short trimmer for the upper thread and long
trimmer (thread length ca. 30 mm) for bobbin thread and gimp. Cutting
before or after sewing, with or without taper, round or cross tack.
The bobbin thread and gimp can thus be either pulled tight or passed
through to sew a lockstitch tack afterwards.
After the cross tack has been sewn they are short-trimmed by hand.
For cut lengths up to 38 mm: fitted as standard with electropneumatic
thread catcher and gimp guide. This grasps the upper thread as soon
as it is severed, holds it clamped and inserts it into the right side to
sew the next buttonhole. This means:
- a secure seam start, even in light, loose weaves - tight starting
stitches
- a clean buttonhole underside, hence no need for trimming.
579-141000
With short trimmer for the upper thread, bobbin thread and lower gimp.
The material is not released by the material clamps until the
thread-trimming process is complete, which means that the lower
thread and lower gimp are trimmed very short .
Cutting before or after sewing, with or without taper, round or cross
tack.
On this machine the buttonhole length, cut length and taper-tack length
can be altered by fitting different clamp-plate sets.
Clamp-plate sets for five groups of cut lengths exist.
L1 for cut lengths of 12-16 mm in 2 mm increments
L2 for cut lengths of 16-20 mm in 2 mm increments
L3 for cut lengths of 20-24 mm in 2 mm increments
L4 for cut lengths of 24-28 mm in 2 mm increments
L5 for cut lengths of 28-32 mm in 2 mm increments.
Within these cut-length groups various taper-tack lengths are possible.
With thread catcher and gimp guide.
579-151000
With short trimmer for the upper thread.
A universal machine for buttonholes with cut lengths of 10-50 mm in
materials of various qualities and thicknesses, available with or without
lower gimp depending on sewing apparatus. Can also be used for
single-chainstitch eyelets in conjunction with appropriate sewing
apparatus.
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