10
3.5.2 Stitch length mechanism
3.5.2.1
Setting of the horizontal component
of the feeder movement
(setting of the upper feeding eccentric)
The feeding eccentric (1) must be angularly set in such a way,
so that the feeding movement for the horizontal feeding
component is delayed in phase against the needle movement.
This requirement is fulfilled when setting the 90
°
angle on the
handwheel (2), when the setting bar (3) is pushed into the
eccentric (1) and leans from above against the feeding shaft
(4).
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
-
Set the angle 90
°
on the handwheel (2) and fix it with the
screw (5) which is component part of the accessory of the
machine (tighten it with care).
- Loosen the gripping joints of the levers (6) and (7),which
grip the shaft (4).
- Turn the feeding shaft (4) in such a way, so that the recesses
(flats) point towards the bedplate (owing to the unambi-
guous setting of the eccentric by means of the setting bar).
- Insert the setting bar (3) into the hole in the eccentric (1)
and prop it from above against the feeding shaft (4).
- Shift axially the eccentric (1) on the shaft into its extreme
positions and place it in the middle.
- Tighten the screws of the eccentric (1) to the maximum
(one screw first and, after having turned slightly the
handwheel, the second screw as well).
- Turn the feeding shaft (4) back into the position for setting
the leverage in such a way, so that the levers (10) of the
mechanism pass in the spots of the recesses in the shaft.
- Tighten the gripping joints of the levers (6) and (7).
- Test the sufficient clearance in the recesses of the feeding
shaft (4) and, using the levers (10) with the maximum stitch
length forward and rearward push against the reverse
stitching lever.
- Correct eventually the position of the feeding shaft.
- Check the position of the prop (11). In this machine provided
with a bottom feed, the prop is mounted into the pits (A and
B) as per the respective drawing.
- Check the setting of the needle according to the par. 3.2.6.
3.5.2.2
Setting of the vertical component
of the feeder movement
The lifting eccentric (1) must be angularly set in such a way,
so that the vertical movement of the feeder is delayed on phase
against the movement of the needle. This requirement is
fulfilled by the angle 174
°
on the handwheel (2) for the
stitching categories 100 and 200, 168
°
suits for the stitching
categories 300 and 400, when the setting bar (3) is inserted
into the eccentric (1) and is propped against the shaft (4).
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set the value 174
°
(168
°
) on the handwheel (2) and fix it
with the screw (5), which is a component part of the machine
accessory (tighten it with care).
- Loosen the screws (6) of the eccentric (1).
- Insert the setting bar (3) into the slot of the eccentric (1)
and prop it against the shaft (4).
- Tighten the screws (6).
5
2
90
o
6
10
1
4
3
7
A
B
11
6
4
3
1
5
174
o
(168
o
)
2
C
D
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