JUKI MF-7900 Series Engineer's Manual page 89

Adjustment procedures
(9) Adjusting the longitudinal position of the blade point of low-
er knife
1. Bring the needle bar to its highest position.
2. Adjust so that the blade point of lower knife ❹ is in the center
of the thickness of looper  when the clearance between the
right-hand edge of looper  and the blade point of lower knife
❹ is 9 mm.
3. Loosen nut  , move lower knife holder ❺ to and fro, and ad-
just the position of the blade point of lower knife ❹ .
4. After the adjustment, tighten nut  .
(Caution) 1. Perform the work with the needle bar at the
highest position when actuating the thread trim-
mer mechanism by hand.
2. After the adjustment, actuate plunger by hand
and confirm that the thread trimmer device
smoothly works.
Results of Improper adjustment
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