Upper Feed Settings Altering The Upper Feed; Altering The Upper Feed; Lateral Position Of The Lever For Transmitting The Setting Wheel Motion - DURKOPP ADLER 767 Service Instructions Manual

7. Upper feed settings
7.1

Altering the upper feed

7.1.1

Lateral position of the lever for transmitting the setting wheel motion

1
2
26
Mechanical sewing foot stroke adjustment
The foot stroke can be adjusted to match the thickness of the material
during the sewing through the setting wheel 7 on the arm cover.
The joint for the sewing foot stroke adjustment is provided with an
eccentric. The eccentric allows the an altering of the foot stroke from 1
to 6 mm or from 1.6 to 7 mm.
Electro-pneumatic stroke adjustment (HP)
The maximum stroke can be activated while sewing is in progress using
the knee switch, when sewing thick material or for overstitching cross
seams .
3
4
5
6
The lever 3 should be centered in the slit of the arm cover.
During operation without the arm cover, the safety stop 1 prevents the
no longer arrested joint 2 from being torn out of the bearing.
At the smallest and the largest stroke there is a clearance of
approx. 0.4 mm between the joint 2 and the safety stop 1.
Caution: Danger of Injury !
Switch off main switch.
Check and adjust lateral position of the lever only when sewing
machine is switched off.
Standard checking
The lateral position of lever 4 must ensure that the ball stud 3 is in the
centre of slit 8 when the arm cover is placed on.
–
Unscrew fastening screws of arm cover 9.
–
Lift arm cover 9 slightly and check lateral position of lever 4.
Correction
–
Remove arm cover.
–
Loosen clamping screw 5 at lever 4.
–
Shift lever 4 axially on shaft 6.
Attention!
The lever must not be twisted when being shifted axially.
–
Tighten clamping screw 5.
7
9 8