24
104 72 47-26
9. The timing of the hook in relation to the needle
Check
- Set a new needle 90 into the machine
- Dismount the stitch plate, bobbin case holder and the bobbin case.
- Set machine on straight stitching.
- As the needle is moving upwards, the tip of the hook should pass
behind the centre of the needle, when the needle is 2.5 mm above
its lower turning position.
NOTE!
Before any adjustment is done check that the setting
" 2. Setting the hook in relation to the feeding eccentric" is correct (see page 17).
Check with setting gauge 411 17 52-01.
1. Turn the handwheel until the needle is at its lower turning position.
2. Place the setting gauge on the needle bar so that the springloaded
stud (A) just touches the needle bar frame and tighten the screw.
3. Move the needle upwards with the handwheel until the springloaded
stud (A) rests against its stop in the setting gauge.
4. The tip of the hook should now be behind the centre line of the needle.
Adjustment
1. Remove the blank pointed screw (B) and loosen the other 2 screws
in the belt wheel of the arm shaft.
2. Repeat checking points 1, 2 and 3 with setting gauge 411 17 52-01 .
3. Hold the arm shaft and turn the hook until its tip arrives behind
the centre line of the needle.
4. Tighten one of the black screws.
5. Make sure the screw descends into the groove of the shaft so that the
belt wheel is placed correctly sideways.
6. Check.
7. Tighten all the screws.
Settings
