15
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 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.
With every correction of the teeth height, the tension of the
chain (2) is to be corrected.
Caution! Dangere of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Loosen the screw (3).
- Loosen the screw (4).
- Loosen or tighten the screw (5) and push simultaneously with
finger the feeder (1) downwards, until the required height of
the teeth X of the wheel feeder is attained.
- Tighten then still the screw (5) by 45
°
(1/8 revolution).
- Tension the tensioner (6) up to the stop. Be careful in side
shifting it to the centre of the chain. Tighten the screw (3).
- Loosen the screw (5) by 45
°
(1/8 revolution), into its original
position. In this way, the optimal clearance of the chain
transmission is attained.
- Tighten the screw (4).
- Correct the set height of the top roller according to the
par. 3.6.5.
3.6.3.2.2 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!
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).
- Dismantle the hook of the left-hand post (see 3.1.8).
- 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 hook of the left-hand post (see 3.1.8).
- 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 in such a way,so that the guide (4) with the feeder (3)
is pushed against the wheel (8) and tighten the screws (9).
3
6
2
X
4
5
1
1
6
9
3
4
5
8
2
1
