JUKI MO-6804D Manuel D'utilisation page 71

(3) The relationship between the upper looper and the lower looper
(4) The relationship between the needle and the double chainstitch looper
(5) The relationship between the needle and the needle guard
❷
❶
Light contact
❸
中国缝纫机设备网
1.4 to 1.9 mm
❹
0.1 to 0.2 mm
– 21 –
When the upper and the lower loopers cross, keep
them as close as possible.
Somehow, the loopers shall not either touch nor col-
lide to each other. The clearance of 0.05 mm 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 mm to 1.9 mm (50H : 1.6 mm to 2.3 mm).
1) Adjust so that needle ❷ comes in light contact
with movable needle guard ❸ when lower looper
❶ moves from left to right until the center line of
needle ❷ (left needle for the 2-needle model) is
reached.
2) Adjust so that the distance from needle ❷ to front
needle guard ❹ becomes 0.1 mm to 0.2 mm when
the needle is in its lower dead point.
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