16
3.6.3.2 Wheel feeder and its post
3.6.3.2.1 Height setting of the feeder and tension-
ing of the chain
The wheel feeder (1) is to be set in such a way that the points
of its teeth overtop the throat plate insert by X= 0.3 to
0.7 mm. When sewing soft and thick materials, it is necessary
to increase the value X, until a good quality of feeding is
attained, but only to the measure of not deteriorating the
beginning of sewing after the carried out thread trimming.
Set the height of the feed dog using a setting gauge.
Caution! Dangere of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- To increase the tooth height above the throat plate, screw in
the screw (2) by the required value.
- To reduce the height, proceed inversely.
3.6.3.2.2 Replacement of the feeder
For the replacement of the wheel feeder according to the
machine setting - see par. 10.2 - setting of the machine - feeder
- pitch of the teeth.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Unscrew the screws (1) and remove the throat plate (2).
- Unscrew the screw (3) and pull out the feeder (4) with the
guide (5).
- Replace the feeder (4).
- Insert the feeder with the guide into the groove and screw
the screw (3) in.
- Mount the throat plate (2) and tighten up the screws (1).
3.6.4 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.
2
X
4
3
5
1
2
1
2
1
4
3
5
A
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