Operation Manual

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
Operation / Explanation
Momentary contact
F-138 = 0
F-184 = 0
The maximum sewing-foot stroke remains activated as
long as the knee switch 3 is being pressed.
Maintained contact
F-138 = 1
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.
Momentary contact
with minimum
stitch count
F-138 = 0
F-184 = 0 < 100
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.
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.
Subclass Stitch length range Sew ing-foot stroke Max. stitch count
Dial position [mm] [min
-1
]
669-180010 0-6 1-3 3000
669-180112 4 2500
669-180312 5 2100
6-9 1800
1-4 2500
6-9 5 2100
6-9 1800
GB
21
4
3