Duplo DF-920 Maintenance Manual page 11

(6) Attaching the press spring T
q Secure the spring hook at the position shown in
the figure, and attach the press spring T.
(Primary adjustment in the assembly stage)
Spring T inner dimensions of idler roller:
45 mm (1.77")
(Spring pressure: 23.5 N ±8.5%)
Spring T inner dimensions of folding roller 1:
50 mm (1.97")
(Spring pressure: 38.8 N ±8.5%)
Spring T inner dimensions of folding roller 2:
49.5 mm (1.95")
(Spring pressure: 37.2 N ±8.5%)
w Perform test folding, and if wrinkles or extreme
folding misalignment along the sides of the paper
occur, check the balance between the left and
right pressure, and adjust by changing the spring
hooking direction. (Secondary adjustment by
passing paper)
(7) Attaching the plate spring (grounding conduction)
The plate spring helps static electricity accumulated in folding rollers to escape to the chassis.
q Attach so that the center drill mark of the folding roller edge and throttle of the plate spring contact.
Check that no anticorrosive coating is applied to the contact area of the folding roller edge.
w Apply conductive grease to the plate spring. (Dow Corning MOLY KOTE 41)
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