Minerva Boskovice 4182i 100 Series, Instruction Manual

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6.8 Reverse stitching
The change of direction of sewn work can be mechanically
controlled via a reverse stitching lever (1) by its depression in
the arrow direction (down). The sub-class defines whether
the machine has electromagnetic reverse stitching – see para-
graph No. 7.
6.9 Stitch length adjustment
Stitch length adjustment is by dial (2) by its turning. Turning
clockwise stitch length is decreased, turning counter-clock-
wise stitch is length increased.
6.10 Safety clutch
The machine is provided with a safety clutch which disen-
gages the driving unit, when the hook is blocked. Reconnec-
tion must be done in the following way:
Caution! Risk of injury!
Before assembly turn the main switch off and wait
until the motor stops!
- Turn the manually operated wheel as far as you can reach the
suitable point for inserting a screwdriver into the space(1).
- Continue turning the manually operated wheel in direction
of the arrow located on it, until you feel the drop in of the
safety clutch.
6.11 Starting of the material trimming operation
The trimming operation can be started at the beginning of the
seam, but also at any moment during the sewing operation.
In such case, the knife pierces the trimmed material and,
starting from this spot, the trimming operation starts running.
- Put the material to be sewn under the presser foot.
- Engage the trimming device in depressing the engaging
lever (1) downwards. The trimming knife (2) will move
downwards into its working position.
Caution! Risk of injury!
When starting the trimming operation, do not put
your fingers under the trimming knife.
- Sew a seam.
- Disengage the trimming device in pulling the engaging lever
(1) upwards.
Especially when starting the trimming operation
in the middle of the trimmed material, do not ex
ceed its maximum permissible thickness = 2.5 mm.
This may break the trimming knife. When apply
ing the maximum sewing speed together with the maximum
stitch length, a smooth trimming cut cannot be ensured. It is
necessary to reduce one or the other in proceeding to a test
on the material to be trimmed.
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