typical GC24660, User Manual

Page: 12 / 36

22 22
21 21
24. Adjusting the clearance between the hook point and the needle (Fig.21) 24. Adjusting the clearance between the hook point and the needle (Fig.21)
25. Relationship between rotating hook and hook set bracket (Fig.22) 25. Relationship between rotating hook and hook set bracket (Fig.22)
Turn the balance wheel to lift the thread take-up lever
to its highest position, then check whether there is a
distance C between the hook and the hook set bracket.
C is usually 0.1~0.3mm.
Adjusting method:
1. Open the hook cover A.
2. When the distance is bigger or smaller, please loosen
the screw B.
3. Turn the set ring D slightly, then tighten the screw B
after adjustment. Turn the balance wheel to lift the thread take-up lever
to its highest position, then check whether there is a
distance C between the hook and the hook set bracket.
C is usually 0.1~0.3mm.
Adjusting method:
1. Open the hook cover A.
2. When the distance is bigger or smaller, please loosen
the screw B.
3. Turn the set ring D slightly, then tighten the screw B
after adjustment.
The clearance between the hook point and needle is
about 0.05mm, which has been adjusted before del
ivery. The readjustment is needed only when the
needle is changed.
1. Take out the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and B.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the rotating hook to align the hook point with
the center of needle groove.
7. Loosen the screw E, and move the post-bed F leftward
and rightward to assure 0.05mm clearance between
the hook point and the needle.
8. Tighten all the screws.
9. Install the bevel gear oil case (upper). The clearance between the hook point and needle is
about 0.05mm, which has been adjusted before del
ivery. The readjustment is needed only when the
needle is changed.
1. Take out the hook cover.
2. Put down the machine head.
3. Take off the bevel gear oil case (upper).
4. Loosen the screw B, A and B.
5. Turn the balance wheel to lift the needle by 1.8mm
from its lowest position.
6. Turn the rotating hook to align the hook point with
the center of needle groove.
7. Loosen the screw E, and move the post-bed F leftward
and rightward to assure 0.05mm clearance between
the hook point and the needle.
8. Tighten all the screws.
9. Install the bevel gear oil case (upper).