Dürkopp Adler 667 Operating Instuructions page 24

Subclass
667-180010
667-180030
667-180112
667-180132
667-180312
667-180332
20
Operating mode for rapid stroke adjustment
The activation time for the maximum sewing-foot stroke depends on which
operating mode is set. You can select between three different operating
modes.
The individual operating modes are determined by the setting of parameters
F-138 and F-184 on the operating panel (see enclosed instructions from the
motor manufacturer).
Operating
mode
Spring return
F-138 = 0
F-184 = 0
Toggle
F-138 = 1
Spring return
with
minimum
stitch count
F-138 = 0
F-184
Note!
The switch 4 on the rear of the knee switch 3 can also be used to switch
between "toggle" and "spring return" modes.
Note!
In order to ensure an operation as safe as possible and a high durability, the
max. speed as shown in the chart should not been exceeded.
4
Fig. 18
Stitch range
[mm]
0 - 6
6 - 9
Operation / Explanation
The maximum sewing-foot stroke remains activate for
as long as knee switch 3 is actuated.
The maximum sewing-foot stroke is activated when
knee switch 3 is actuated.
Actuating the knee switch again deactivates the maxi-
mum sewing-foot stroke.
The maximum sewing-foot stroke remains activate for
as long as knee switch 3 is actuated.
After releasing the knee switch, the machine contin-
ues to sew at the maximum sewing-foot stroke until
the specified minimum stitch count (parameter F-184)
is reached. Afterwards, sewing continues at the
0 < 100
standard sewing-foot stroke.
Sewing-foot stroke
Adjusting knob position
1 - 3
6 - 9
1 - 4
6 - 9
max. stitch count
4
5
5
[rpm]
3000
2500
2100
1800
2500
2100
1800