12
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.
3
2
1
2
5
3
4
6
7
5
1
2
8
