To Adjust The Position Of The Knlves - Janome MyLock 744 Servicing Manual

Correct Setting:
* The tip of the lower knife should be leveled with the surface of needle plate. When the upper knife
is at the lowest position, the front lower corner of the upper knife should be 0.8 to 1.5 mm beIow
the edge of the lower knife.
To adjust:
1. Before proceeding with this adjustment, check the upper knife timing (see page 12).
2. Loosen setscrew
3. Loosen the lower knife shaft setscrew
lower knife position. Tighten setscrew
4. Turn the handwheel toward you to bring upper knife to its lowest position.
5. Loosen the hexagonal bolt
6. Tighten hexagonal bolt
matching position with the lower knife.
Upper knife
Lower knife
Setscrew B
Setscrew A
Eccentric pin C
TO ADJUST THE POSlTlON
OF THE KNIVES
A
to remove the looper cover guide.
D
and adjust the position of the upper knife.
D
firmly, turn the handwheel toward you to check the upper knife
Hexagonal bolt D
Looper cover guide
Drawing 3
Setscrew B
Drawing 2
B
and turn the eccentric pin
B
. (Drawing 2 ~ 4)
Surface of needle plate
Lower knife
23
C
slowly, then adjust the
Drawing 1
Lower knife blade
Drawing 4
0.8 to 1.5 mm
Drawing 5
Upper knife
Hexagonal bolt D