15
3.6.2.3 Setting of the lower eccentric
The rotation of the eccentric (3) must be delayed in phase
against the rotation of the stitch length eccentric. This
corresponds with the angle 250
°
on the handwheel (1) for the
stitching categories 100 and 200, 244
°
is in correspondance
with the stitching categories 300 and 400, when the setting
pin (4), which is in contact with the toothed belt (5), is being
inserted into the eccentric (3).
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set 250
°
(244
°)
on the handwheel (1) and lock it with the
screw (2), which is included in the accessory of the machine
(tighten it carefully).
- Put the setting stick (4) into the hole in the eccentric (3) and
prop it from below against the indented belt (5).
- Set eccentric (3) axially.
- Tighten it the utmost the screws of the eccentric (6).
- By means of the handwheel, turn the eccentric (3) into the
marked position and check in this position the clearance
A = 0.05, proceed eventually to its correction by a new
side setting of the eccentric.
3.6.2.4 Setting the engagement and
disengagement of the clutch
The nut (7) must be laterally set in such a way, so that the
clutch change over occurs in the moment, when the star (3)
does not move, which means, when it is in a dead centre of its
oscillating motion. This corresponds to the angler 90
°
on the
handwheel.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Loosen the screws of the indented pulley of feeding and
shift it to the left.
- Set the maximum stitch length.
- Set the angle 90
°
on the handwheel (1) and lock it with the
screw (2). which is included in the accessory of the machine
(tighten it carefully).
- Loosen three screws (6) in the nut (7) and unscrew it by
2 mm to the left.
- Tighten slowly the nut (7), until it strikes against the axial
bearing (9). (At this moment, the tightening moment
increases in jumps) and tighten the screws (6).
-
Set the handwheel onto 85
°
and depress the reverse stitch-
ing lever, the roller presser foot must turn against the
stitching direction. The feeder exerts too a reverse motion.
Turn slowly the handwheel and, at the same time, depress
the reverse stitching lever. When attaining about 90
°
, the
reverse stitching lever stops its engagement and the roller
presser foot stops turning at all. In the handwheel position
of 95
°
(and more), the roller presser foot may not turn at all.
The reverse stitching lever starts engaging anew. When the
clutch changes over too fast, turn a bit the nut (7) to the
right and inversely.
- Tighten the screws (6).
- Return the indented pulley in its original place according to
the paragraph 3.6.3.
1
2
90
o
3
6
4
5
A
244
o
2
1
6
7
9
3
