Instruction manual

1
Part A - Instruction manual
1. Proper use of the machine
The machine is designed mainly for sewing operations in the shoe manufacture for assembling quarters and linings, for sewing
through tongues, for sewing babouches and for decorative sewing of shoes. It is suitable for assembling leather and textile
materials in the fancy goods industry. In general, only dry material may be sewn on these machines. Maximum thickness of the
sewn material: up to 3 mm - leather; up to 5 mm - shoemaking fabric. The material should not contain any hard objects, because
in such opposite case the sewing operation would be possible only with an eye protector. Such eye protector is not supplied for
the time being. When sewing very hard or compact materials with a thicker needle, the total thickness thereof is limited. In such
case it is also necessary to reduce substantially the sewing speed below the value quoted in the par. 5. These machines may be
installed and operated only in dry and maintained rooms.
As manufacturers of industrial sewing machines we start from the supposition that our machines will be operated at least by a
trained staff, so that all usual operating activities and their eventual risks may be supposed to be known.
Machine noisiness
The noisiness of machines is measured according to ISO 3746, ISO 11204 at the maximum sewing speed.
Laeq = equivalent noise level of the machine itself on the working place converted in % of the machine utilization (dB) – is given
in the following table
2. Description of the machine
It is flat-bed single-needle machine. It sews with double-thread zigzag lock-stitch, with two-way drop feed. The stitch length is
adjustable using a knob. The backward stitching is controlled by a hand lever, eventually, by pedal or by electromagnet in
accordance with the equipment of the machine. The width of the zig-zag stitch is adjustable with a lever on the machine arm. The
presser foot lifting is controlled by a hand lever, eventually, by pedal, or by a knee lever or by electromagnet in accordance with
the machine equipment.
The machine is provided with a large diameter horizontal hook. It has a 1.8 x greater reserve (volume) of threads than a standard
hook. The lubricating system of the machine is of a group wick-feed type with automatic regreasing of the hook.
3. Machine subclasses
Table 1
4. Survey of equipment
This survey does not include the equipment assembled on the stand (see part B).
4.1 -for the subclass -101
4.1.1 Necessary equipment
S791 995068 Parts of backtacking (with pedal)
4.1.2 Sewing equipment
S791 124061 35 Sewing equipment 527 E 461 - standard
Type of the Noisiness % machine
machine dB employment
527-101 83 20
527-105 83 20
Machine type Hook Presser foot lifting Backtacking Thread
trimmer
Class-subclass Large Via knee lever Via electro- Via hand Via Via electro-
or pedal magnet lever pedal magnet
527-101
527-105
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optional equipment
standard equipment