Looping Stroke And Needle Protection - Duerkopp Adler 910 Service Instructions Manual

3.6 Looping stroke and needle protection

8
DPx5
9
DPx17
9
Caution: danger of injury!
Turn off the main switch.
Check and adjust looping stroke and needle protection only when the
sewing unit is switched off.
Note and control
The needle bar is provided with four notches as an adjusting aid.
The uppermost two notches are for the DPx5 needle system. The lower
two notches are for the needle system DPx17.
The looping stroke is the course of the needle 2 from its bottom dead
centre to the point where the hook tip 1 is at the level of the middle of
the needle.
In the looping stroke position, the needle should be pushed away
slightly from the driver (needle protection).
–
Insert a new, straight needle.
6
–
Move needle bar 8 into its lowest position by turning the
handwheel.
–
Turn handwheel in rotation direction until the lower notch 6 (DPx5)
8
or the lower notch 7 (DPx17) stands at the bottom of the needle bar
bush 9.
–
Press hook 5 against the driver 4 in the opposite direction of
rotation.
–
Verify that the hook tip 1 is at the level of the middle of the needle.
–
Verify that the needle is pushed away from the driver tip a little bit
(needle protection).
Adjustment
–
Loosen screw 3 at the driver 4.
–
7 Twist driver accordingly.
–
Move driver axially in such a way that the needle abuts on the
driver tip and is pushed away a little bit.
8
–
Tighten screw 3.
2
1
4
5
3
3
21