Hook Settings; Loop Stroke And Clearance Of The Hook Point To The Needle - Duerkopp Adler 69-373 Service Instructions Manual

6.

Hook settings

6.1

Loop stroke and clearance of the hook point to the needle

4
5
0,1 mm
1
Caution: Danger of injury!
Turn off the main switch.
Check and set the loop stroke only when the sewing machine
is switched off.
Rule and control
The loop stroke (2 mm) is the run of the needle bar from the bottom dead
center up to the point where the hook point 1 lies at the middle of the needle.
Use the block 5 (order no. 0981 150002) and gauge 4 (order no.
0981 150003) to perform the setting.
–
Use a needle with the size Nm 90.
–
Set the stitch regulator lever to sewing length " 0 ".
–
Turn the handwheel to put the needle bar into its lowest position.
–
Fix the loop stroke gauge 4 with the block 5 against the needle bar
rocker.
–
Tighten the screw of the block 5 and pull out the loop stroke gauge 4.
–
Turn the handwheel in its direction of rotation until block 5 hits the
needle bar rocker.
In this position, the hook point 1 must lie at the middle of the needle.
Adjustment
–
Loosen screws 2 and 3 on the hook.
–
Turn the hook on the hook shaft.
The hook point 1 must lie at the middle of the needle.
Thereby the clearance between hook point 1 and the furrow of the
needle must be 0.1 mm.
–
Tighten screws 2 and 3 again.
ATTENTION!
When a needle with a different size is inserted:
–
Check the clearance of the hook to the needle and correct it, if
necessary.
2
3
GB
19