The Relationship Between The Needle And The Looper - JUKI MO-6800S Series Instruction Manual

5-11. The relationship between the needle and the looper

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
(1) The relationship between the needle and the upper looper
4.8 to 5.2 mm
(2) The relationship between the needle and the lower looper
3.7 to 3.9 mm
5.4 to 5.7 mm
3.7 to 3.9 mm
– 22 –
When the upper looper moves to
the leftmost point, the distance
from the looper tip to the center
line of the needle is 4.8 to 5.2 mm.
For 2-needle model, the distance
from the looper tip to the center
line of the left needle is 5.4 to 5.7
mm (60H: 5.0 to 5.5 mm).
1) When the lower looper moves to the
leftest point, the distance between the
looper tip and the center line of the
needle should be about 3.7 to 3.9 mm
(40H, 44H, 50H and 60H : 4.1 to 4.3
mm). For 2-needle model, the distance
is from the lower looper tip to the cen-
ter line of the left needle.
2) Adjust the distance
f r o m t h e l o o p e r
tip to the scarf of
the needle to 0.01
t o 0.1 m m w h e n
the lower looper
moves to the right
toward the center
line of the needle
(for the 2-needle
m o d e l s , t h e l e f t
needle is used as
the reference).