To Adjust The Position Of The Knlves - Janome FA4 Service 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 A to remove the looper cover guide.
3. Loosen the lower knife shaft setscrew B and turn the pin C slowly, then adjust the
lower knife position. Tighten setscrew B. (Figure 2 to 4)
4. Turn the handwheel toward you to bring upper knife to its lowest position.
5. Loosen the hexagonal bolt D and adjust the position of the upper knife. (Figure 1)
6. Tighten hexagonal bolt D firmly, turn the handwheel toward you to check the upper knife
matching position with the lower knife.
Upper knife
Lower knife
Setscrew B
Setscrew A
Looper cover guide
Figure 3
Pin C
TO ADJUST THE POSITION
OF THE KNIVES
Hexagonal bolt D
Surface of needle plate
Setscrew B
Figure 2
24
Figure 1
Lower knife blade
Figure 4
0.8 to 1.5 mm
Lower knife
Figure 5
Upper knife
Lower knife
Hexagonal bolt D
Upper knife
Hexagonal bolt D