14
3.6.2.4 Setting of the height of the feeder teeth
The height of the feeder teeth is to be set according to the
stitching category from 1,2 to 1,4 mm above the throat plate
insert.
Caution! Danger of injury!
switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set the height of the feeder teeth after having done the
previous setting (par. 3.6.2.3).
- Using the handwheel , set the needle into its top dead centre
(the feeder is in its maximum position above the throat plate).
- Loosen the screw (1) of the lever (2).
- Using the notches on the eccentric (3), adjust the angular
position of the eccentric so as to obtain the required value
of the eccentric height.
- Tighten the screw (1), check the setting.
3.6.2.5 Forward and rearward stitch length
distribution (rough)
The cam (1) is to be set at the respective angle in such a way
that the stirrup (6) is oriented in such a position, so that the
connecting rods (7 and 8) are in a line with a thoroughly
screwed in knob (9) and with turning the handwheel at 0
°
.
This setting can be done only after having set the top eccentric
according to the paragraph 3.6.2.1.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set the zero stitch /screw in the knob (9) to the bottom of
the cam (1)/.
- Set the angle 0
°
on the handwheel and lock it with the screw
(4).
- Turn the screw (3) in the respective sense in such a way that
the connecting rods (7 and 8) are in a line and tighten the
screw (2).
3.6.2.6 Forward and rearward stitch length
distribution (fine)
When setting the maximum length of the stitch, the forward
and the rearward stitch length must be equal with the
maximum error of ± 5 %. This setting is only feasible after
having set the bottom feeding /par. 3.6.2/ and after having
set the feeding of the driven top roller /par. 3.7/.
Caution! Danger of injury!
switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set the maximum stitch length .
- Place a suitable material under the presser foot and mark
therein the forward and the rearward stitch length.
- With an unequal length of the stitch, proceed to the cor-
rection of setting by turning the screws (2 and 3). When
tightening the screw (3), the forward length of the stitch is
shortened and inversely. When tightening the screw (2), the
forward stitch length is lenghtened.
- Loosen always one screw and tighten thereafter the other
one.
1,2÷1,4
1
3
4
0
o
6 7 8
2
3
2
1
9
3
2