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3.5.3.2.2 Replacement of the feeder
For the replacement of the wheel feeder (change of the wheel feeder
according to the machine setting - see par. 11.2 - setting of the machine
- feeder - pitch of the teeth).
Caution! Danger of injury!
3
Switch off the main switch! Before starting the setting
4
operation, wait until the motor stops!
- Unscrew the screws (1) and remove the throat plate (2).
- Unscrew the guard (7).
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- In pulling upwards (securing by a spring), pull out the feeder (3)
with the guide (4).
- Replace the feeder (3).
- Insert the feeder with the guide into the groove of the holder (5).
- Mount the throat plate (2) and tighten up the screws (1).
- Check up, if the spring (6) pushes the guide (4) with the feeder (3)
against the wheel (8).
- In the opposite case, loosen the screws (9), tense up the spring (6)
in such a way,so that the guide (4) with the feeder (3) is pushed
against the wheel (8) and tighten the screws (9).
- Mount the guard (7) and tighten the screws.
3.5.4 Setting the top roller (pressing force, height)
When lowering the top roller (1), set the clearance „A“ between the
feeder (5) and the top roller to the maximum of 0.2 mm. Set the pressing
force of the top roller (1) so as to avoid the slippage of the sewn material
when feeding it.
Method of setting the height of the top roller:
- Lower by hand the presser bar (3) with the top roller (1) above the
wheel feeder (5).
- Loosen the screw (4) and set the required value „A“=0.2 mm.
- Tighten the screw (4).
Setting the force of the top roller (1).
- In screwing in the screw (2),the force of the top roller is increased and
inversely.
3.6 Feeding mechanism of the top roller
3.6.1 Description
The starting movement for the drive of the top roller feeder is the
bottom feeding shaft. From this shaft, the movement is transmitted by
the indented belt (1) onto the top feeding shaft (2). A component part
of the transmission by indented belt is the pulley (3), the tensioning
roller (4), the roller (5) and the pulley (6). Starting from the shaft (2),
the movement is further transmitted through the wheels (7 and 8)
ontothe articulated shaft (9). From this articulated shaft, the movement
is transmitted by a cone transmission, situated in the holder (10), onto
the feeder wheel (11). The shaft of the wheel (8) is mounted in the
screw (12) on bearings. The articulated shaft (9) contains two joints
(15) and a telescopic part (16). Both these elements secure the lifting
and the tilting of the top roller.
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