Duplo DB-250 User Manual

51
(B) Nail head through the spine
LL = RL, RR = LR
(1) Decreasing certain quantity of the hot-melt glue by glue meter, then make
some books to see if the spine has been improved on both sides.
(2) Slightly turn the VR knob counter clockwise to decrease the nipping
pressure, then make some books to see if the spine has been improved on
both sides.
(3) If (1) or (2) can not improve the book spine, you have to do the adjustment
for the clamps. Slightly loosen the upper lock nuts, then gradually tighten the
upper screws of the clamps until there is no gap between the spine and the
nipping plate surface when you close the clamps. Make some books to see if
the spine has been improved on both sides.

Duplo DB-250 Specifications

General

Brand	Duplo
Model	DB-250
Category	Binding Machine
Language	English