JUKI MO-6804S Instruction Manual page 68

(3) The relationship between the upper looper and the lower looper
(4) The relationship between the needle and the double chainstitch looper
❹
❺
❺
0 ± 0.05 mm
(5) The relationship between the needle and the needle guard
❶
❷ Light contact
1.4 to 1.9 mm
❹
Tip has to be
located inside
the side face
of needle.
❸
0.1 to 0.2 mm
– 20 –
When the upper and the lower loopers cross, keep
them as close as possible.
Somehow, the loopers shall not either touch nor collide
to each other. The clearance of 0.05 to 0.2 mm should
be provided between the upper and lower loopers when
they are crossing.
When the double chainstitch looper moves to reach its
leftmost position, the distance from the double chain-
stitch looper to the center line of the needle should be
1.4 to 1.9 mm (50H, 60H: 1.6 to 2.3 mm).
Adjust so that the clearance of 0 ± 0.05 mm is provided
between crest of the lower end of scarf of double
chainstitch needle ❹ and double chainstitch looper ❺.
At this time, the tip of double chainstitch looper ❺
should be located inside the side face of double chain-
stitch needle ❹.
Adjust so that movable needle guard ❷ comes in light
contact with the needle when overlock needle ❶ (left
needle for the 2-needle model) is brought to its lower
end position.
Adjust so that the distance from needle ❶ to front
needle guard ❸ to 0.1 to 0.2 mm.