Minerva Boskovice 4181i 3 Series, Инструкция по эксплуатации

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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 To exchange and set the trimmer knife
Caution! Risk of injury!
Before assembly turn the main switch off and wait
until the motor stops!
- Loosen the screw (1).
- Take the trimmer knife (2) out in the direction of the arrow.
- Set the angle of 180
°
on the handwheel (lower dead point of
the needle). Tilt the machine head and rotate by hand the
drive shaft of the work trimmer so as to set the knife holder
to its rear end position.
- Insert the new trimmer knife (2) and set it at the distance
„A“= 0.5 to 1 mm from the needle.
- Loosen the screw (1).
- Be sure in maintaining the minimum clearance between the
knife trimmer edge and the throat plate insert, correct even-
tually the distance with the screw (4) after having loosened
the screw (3). Tighten the screw (3).
1
1
2
A
3
4
1
2