Lower Feed Wheel; Feeding Clutches; Description; Setting The Lever Of The Second Step Of Feeding(Angle, Position) - Duerkopp Adler 4181i-3 Instructions For Service Manual

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3.5.3 Lower feed wheel

3.5.3.1 Feeding clutches

3.5.3.1.1

Description

The feeding clutch is formed by the clutch cover (1) driven from the
connecting bar (2), by the clutch star (4) driven from the connecting
rod (3) and by the carrier plate (5) firmly connected with the shaft (6).
Of the clutch give the connecting rods (2 and 3) an opposite direction
swinging movement. 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 (12) against the cover of the
clutch (1).
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. 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 rods (2 and 3). The setting of the
change-over of clutches is done by tightening or by loosening the nut
(13).
3.5.3.1.2 Setting the lever of the second step
of feeding (angle, position)
The lever of the second step (1) must be set in such a way that, in the
bottom dead centre of the needle, the axis of the spider part (2) lies in
the screw axis (3). The pin screw (4) is mounted into the position 4.1-
corresponds to the maximum stitch length of 5 mm.
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.
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