Duerkopp Adler 669 Instruction Manual page 25

3
4
Subclass
669-180010
669-180112
669-180312
1-4 2500
Operating mode for the 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 particular modes are specified on the operating panel by setting
the parameters F-138 and F-184 (refer to the instructions from the
motor manufacturer).
Operating mode
Momentary contact
F-138 = 0
F-184 = 0
Maintained contact
F-138 = 1
Momentary contact
with minimum
stitch count
F-138 = 0
F-184 = 0 < 100
Note!
The switch 4 on the rear of the knee switch 3 can also be used to
switch between the "maintained contact" and "momentary contact"
modes.
NOTE!
Do not exceed the max. stitch count limits specified in the table.
Observing these limits will ensure safe operations and a long lifespan
for the machine.
Stitch length range
Dial position
0-6
6-9
Operation / Explanation
The maximum sewing-foot stroke remains activated as
long as the knee switch 3 is being pressed.
The maximum sewing-foot stroke is activated when
the knee switch 3 is pressed.
Pressing the knee switch again will then deactivate
the maximum sewing-foot stroke.
The maximum sewing-foot stroke remains activated as
long as the knee switch 3 is being pressed.
After releasing the knee switch, the machine
continues to sew with the maximum sewing-foot stroke
until the specified minimum stitch count (parameter
F-184) is reached. Afterwards, sewing continues with
the standard sewing-foot stroke.
Sewing-foot stroke
[mm]
1-3
4
5
6-9
5
6-9
Max. stitch count
[min -1
]
3000
2500
2100
1800
2100
1800
GB
21