11
1
2
5
3
4
6
7
5
1
2
8
3
2
3.5.2.3b 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 can be done only after having set
the needle feed (par. 3.5.3) and the wheel feed (par. 3.5.4.1.2).
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. Tighten the screw (2).
3.5.2.4 Setting the control knob (including the stitch
length limitation).
The control knob (1) is to be set up in such a way that, when
turning it in counterclockwise sense up to the stop, the
maximum stitch length valid for the given sewing category is
attained (cat. 1: 3 mm, cat 2: 5 mm, cat. 3 : 5 mm). The scale of
the control knob is to be oriented in such a position, so that
the scale end corresponds to the maximum stitch length,
excepting the first sewing category, where the stitch length of
the indicator is 3 mm.
Caution! Danger of injury
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Screw in the screw of the control knob in such a way that the
ball of the screw (3) bears on the seat of the cam (4).
- Loosen the screw (5) and turn the control knob in the
clockwise
direction, until the pin (6) of the knob (1) bears on the pin
(7). Tighten firmly the screw (5).
- Turn the knob in the counterclockwise direction up to the
stop,
when the pin (6) of the knob (1) bears on the pin (7).
- In a sewing test check up the length of the stitch, if this
corresponds to the maximum stitch length valid for the given
sewing category.
- If the stitch is longer, loosen then the screw (5) and turn the
knob in the clockwise direction and inversely. Tighten firmly
the screw (5).
- Insert a screwdriver into the hole (8) of the scale (2) and
adjust the scale in such a way that the maximum length on
the scale is against the marking of the stitch length on the
machine arm.
- For the sewing category 1, set the control knob (1) on the
stitch length of 3 mm and check it by a sewing test.
- Loosen the screw (5) and turn the control knob (1) in the
counterclockwise direction, until the pin6) of the knob (1)
bears on the pin (7). Tighten firmly the screw (5).
- Put a screwdriver into the hole (8) of the scale (2) and adjust
the scale in such a way that the value of the stitch length on
the scale against the marking on the arm is 3 mm.
