-55-
24.
BUTTON HOLE STITCH BUTTON HOLE LENGTH
STANDARD
When a button hole is sewn using a 20 mm button, the button hole length should be sewn 21-23 mm. The BH
operation should be 0.5-1.1 N (50-110 gf) on the return side.
ADJUSTMENT
1.
Loosen the BH change arm set screw.
2.
Adjust according to the arrow mark 2 on the BH lever.
3.
Tighten the BH change arm set screw.
4.
Loosen the screw securing the eccentric nut.
5.
Turn the eccentric nut and align with 0.5-1.1 N (50-110 gf) on the BH lever return side. (The adjustment
should be made within 1/2 rotation of the eccentric nut.)
6.
Tighten the screw securing the eccentric nut.
* Adjust the BH lever changing timing with the BH notch adjustment screw.
21-23 mm
20 mm
Eccentric nut
BH change arm
BH notch adjustment screw
0.5-1.1 N
(50-110 gf)
Shorter
BH lever
Longer
