Adjusting The Needle Height And Looper Timing - JUKI MO-6800S Series Engineer's Manual

7. Adjusting the needle height and looper timing

Description
Classification
Subclass
1-needle over-
MO-6804S
lock machine
MO-6814S-2 H
MO-6814S-3 H
2-needle over-
lock machine
MO-6814S-4 H
MO-6814S-30P
MO-6816S-3 H
MO-6816S-50H
Safety stitch
machine
MO-6816S-60H
MO-6816S-30P
Needle height
1-needle 2-needle Safety stitch
2-needle (left)
(right) (left)
Safety stitch (right)
A B C
10.4-10.6
(9.1)
11.8-12 (10.5)
(9.1)
10.4-10.6
(7.6)
11.8-12 (9)
12.6-12.8 (9.8)
10.4-10.6 (7.6)
04 14 16
A A
B C
Upper looper components
Height Projection Upper looper holder
amount
Height of pin Center to center
D E H
(10.8) 4.8-5.2 48.4
(10.5) 50.3
5.4-5.7
(12) 51.3
(10.5) 50.3
(10.8) 48.2
4.8-5.2
(12) 48.5
(12.7) 5-5.5 51.3
(10.8) 4.8-5.2 48.2
E E
D
D
A
H
Lower looper Double chain looper
components
Returning Radius Returning
amount amount
I F J
3.7-3.9
39.0
4.1-4.3
68.1
3.7-3.9
1.4-1.9
4.1-4.3 1.6-2.3
40.0
39.0 3.7-3.9 1.4-1.9
F
J
(Unit : mm)
components
Radius
G K
64.5
G
K