Operation Manual

Operation mode of the quick stroke adjustment
The activation period of the maximum sewing foot stroke depends on
the set operation mode. It is possible to choose between three
operation modes.
The individual operation modes are determined by the setting of the
parameters F-138 and F-184 at the control panel (see enclosed
instructions of the motor manufacturer).
Operation mode
Operation / Explanation
Keystroke
F-138 = 0
F-184 = 0
The maximum sewing foot stroke remains activated as
long as the knee switch 3 is actuated.
Push-lock
F-138 = 1
The maximum sewing foot stroke is activated by
actuating the knee switch 3.
By actuating the knee switch once again the maximum
sewing foot stroke is deactivated.
Keystroke
with lowest
speed
F-138 = 0
F-184 0 < 100
The maximum sewing foot stroke remains activated as
long as knee switch 3 is actuated.
After releasing the knee switch the machine sews with
the maximum sewing foot stroke until the set minimum
number of stitches is reached (parameter F-184).
Afterwards, the seam is continued with normal sewing
foot stroke.
Please note!
The switch 4 on the rear of the knee switch 3 can also be used to
switch between the “keystroke” and “push-lock” operation modes.
Hint!
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.
Subclass Stitch length range Sew ing-foot stroke max. Speed
Setting w heel position [mm] [min
-1
]
869-180020 0-6 1-3 2800
869-180112 4 2500
869-180322 5 2100
869-280020 6-9 1800
869-280122
869-280322 1-4 2900
6-9 5 2100
6-9 1800
GB
25
4
3