Hook Settings; Looping Stroke - DURKOPP ADLER 767 Service Instructions Manual

4.

Hook settings

4.1

Looping stroke

2
12
Caution: Danger of injury !
Switch off main switch.
Check and adjust looping stroke only when sewing machine
is switched off.
Standard checking
The looping stroke (2 mm) is the way of the needle bar from the bottom
dead centre to the point where the hook tip 11 is at the level of the middle
of the needle. The looping stroke is controlled by means of setting block 4
(Order No. 0981 150002) and gauge 3 (Order No. 0981 150003).
11
–
Check whether safety clutch 12 snaps in (see chapter Safety clutch)
–
Screw off throat plate.
–
Set stitch length to "0".
–
Move needle in position "down" by handwheel.
–
Press gauge 3 with block 4 against wing 2.
–
Tighten screw 7 and pull out gauge 3.
Turn handwheel in travel direction until block 4 abuts on needle
–
bar wing 2 (looping stroke position).
In this position the hook tip 11 must be at the level of the middle of
the needle.
Correction
–
Loosen screws 5 at the clamping rings 6.
–
Twist hook until hook tip 11 is at the level of the middle of the needle.
–
Position shaft 8 axially.
The clearance between the clutch claws 9 and 10 must amount to
0.5 mm.
–
Position clamping rings 6 flush with the steps in driving shaft 8.
–
Tighten screws 5.
ATTENTION !
After a correction of the looping stroke the following adjustment
is to be checked and corrected, if necessary:
(see chapter 4.4 Hook protection)
1
3
4
5
6
7
8
9
10
0,5 mm
GB
15