Sewing-Foot Stroke - Dürkopp Adler 767 Operating Instructions Manual

5.7

Sewing-foot stroke

The height of the sewing-foot stroke is set with adjusting wheel 1.
Machines without FA (without Thread Trimmer)
On these machines the speed of rotation is not checked.
Please comply with the note and table below.
Machines with FA (with Thread Trimmer)
The sewing-foot stroke and stitch rate are interdependent. A potentiometer is linked
mechanically with the adjusting wheel 1. By means of this potentiometer the control unit
detects which foot-stroke has been set and restricts the speed accordingly.
Machines with HP 13 - 7 (Speedomat)
The maximum stroke can be activated while sewing is in progress with the knee switch 2.
Like machines with FA, these machines also have a potentiometer.
Adjusting the sewing-foot stroke
–
Set adjusting wheel 1.
NOTE
In order to ensure maximum durability and safety in operation, the maximum stitch rates
given in the table below should not be exceeded.
Stitch-length range Adjusting
mm wheel item
(mm foot stroke)
0 - 6 min. - B
(up to 2 mm)
C - D
(2 - 5 mm)
E - max
(5 - 7 mm)
6 - 9 min - max
(1 - 7 mm)
1)
On machines with the speedomat HP 13 - 7 the stitch rate may be increased by
about 300 stitches/min to the figures in brackets.
The HP 13 - 7 is described in detail on page 36.
Min. , A , B , C , D , E , F , max.
min. = minimum stroke
max. = maximum stroke
Subclass
-VF-373 / VF-573
-AE-73 / AE-5-73
-FAS-473
-FAS-573
-all others
-VF-373 / VF-573
-AE 73 / VF-5-73
-all others
all
all
GB
Max. stitch rate
stitches/min
3 000
2 800
3 200
3 200
1)
3 200 (3 500)
2 500
2 300
1)
2 700 (3 000)
2 000
2 000
17