13
3.6.3 Lower feed wheel
3.6.3.1 Feeding clutches
3.6.3.1.1
Description
The feeding clutch with machines without the needle feeding
is identical with the clutch for the needle feeding. The
difference is in its function.Feeding is namely realized here by
one step. For this reason, the clutch lid (1) is firmly anchored
by the draw bar (2) and by the pin (15) in the machine arm.
The rotating motion of the shaft (6) is produced from the
oscillating motion of the draw bar (3) through the lever (14),
the star (4) and the driving disk (5) firmly connected with the
shaft (6).The clutch is coupled by means of the wedge (7) on
the connecting rod (8) through the eccentric (9) which is placed
on the lower shaft (10).
In the position, when the wedge is disengaged, the star (4)
is shifted out from the frictioning engagement with the lining of
the carrier plate (5) by means of the spring washer (11). The plate
(5) lining is then pushed by means of a flat profiled spring (2)
against the cover of the clutch (1).
In this phase, the shaft (6) is connected with the cover of the
clutch (1) which is connected with the machine arm, so that
the shaft (6) does not rotate and, consequently does not feed
the sewn work.
In the position, when the wedge is disengaged, the star (4)
is pushed against the plate (5) lining and, at the same time,
the friction connection with the cover of the clutch (1) is
disconnected. In this phase, the shaft (6) is connected with
the star (4) and is rotating, which means that it is feeding.
Within a short instant, when engaging and disengaging with
the carrier plate (5), there are in a friction engagement both
the cover (1) and also the star (4), namely in the dead centre of
the connecting rod (3). The setting of the change-over of
clutches is done by tightening or by loosening the nut (13).
3.6.3.1.2
Setting the lever of the feeding
(angle, position)
The feeding lever (1) must be set in such a way, so that, when
the needle is in its lower dead centre, the axis of a part of the
star (2) coincides with the axis of the screw (3).
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
Lever (1) displacement
- Loosen the screw (6).
- Set the maximum stitch length.
- Set the angle 180
°
on the handwheel.
- Unscrew the screw (5) and put the needle shank in its hole.
- Turn the lever (1) until the needle drops into the clutch disk (2).
- Side set the lever (1) to the measure A= 0.5 to 1 mm.
- Tighten the screw (6).
- Screw in the screw (5) and seal it with the Loctite cement.
7 8
1 4
2
5
A
3
9
1
13
7
4
12
5
11
6
10
8
2
14
15
3
2
3
5
8
6
1
