JUKI AMB-289, Engineer'S Manual

Page: 6 / 177

– 2 –
(2) Shapes of buttons
1) Specifications for 4-holed and 2-holed buttons
A : Buttonhole diameter Needle used : ø 1.5 mm or more when using #12 to #16
Needle used : ø 2 mm or more when using #16 to #18
B : Distance between buttonholes 1.5 to 6.0 mm (in increments of 0.1 mm)
C : Location of buttonholes All holes must be located equidistant from the center of each button.
D : Outside diameter Min. outside diameter : ø 8 mm
Max. outside diameter : ø 32 mm
Line height : within ± 0.25 mm
E
1
: Button with a round edge R (roundness) of button edge must be a 3 mm radius or less.
E
2
: Button with a V-shaped edge Within 120 ° angle
E
3
: Button with an angular edge The thickness must be 5 mm or less.
F : Bulge 5 mm or less
G : Area around buttonholes Must be smooth
H : Thickness of button 8 mm or less
2) Specifications for shank button and marble button
A: Buttonhole diameter ø 1.5 mm or more
B: Thickness of button 6.8 mm or less
C: Distance from the Shank button :
bottom of the button 1 mm to 6 mm
head to the center Marble button :
of the buttonhole 1.5 mm or more
D: Length of shank 8 mm or less
E: Height of the 3.5 mm or less
straight section on the 000
side face of button
F: Outside diameter Min. outside diameter :
ø 8 mm
Max. outside diameter :
ø 32 mm
G:Distance from the center 2 mm or less
of the hole to the button
edge
(Caution) When the button loader is used, there are cases where the buttons cannot be used due to the
shape. So, be careful.
A
B
B
C
D D
E
1
G
F
H H H
F F
G G
G
E
2
E
3
E
3
F
A
E B
C
D
F
A
E
C
G
B