13
3.6.2.3b 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. 3.6.3) and the wheel feed (par. 3.6.4.1.2).
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 correction
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).
3.6.2.4 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 in the counterclockwise sense up to the stop, the
maximum stitch length valid for the given sewing category
and the stitch width is attained. The scale on the control knob
is to be oriented in such a position that the respective maxi-
mum stitch length on the scale is against the marking on the
machine arm.
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).
- The control knob (1) is to be set to the maximum stitch
length corresponding to the respective sewing category and
to the given stitch width. Check up the set up length by a
sewing test.
- Loosen the screw (5) and turn the control knob in the
counterclockwise sense, until the pin (6) of the knob (1)
bears on the pin (7). Tighten firmly the screw (5). Check it
up by a sewing test.
- Put a screwdriver into the hole (8) of the scale (2) and adjust
the scale in such a way that the respective maximum stitch
length on the scale is against the marking on the machine
arm.
1
2
5
3
4
6
7
5
1
2
8
3
2
