Carl Valentin DPM IV, Руководство по эксплуатации

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Installation and Initiation DPM IV
32 Operating Manual 05.18
5.5 Using a Customized Counter-Pressure Plate

The counter-pressure plate (B) should be made of silicone with a
hardness of 60
… 65° Shore A and a thickness of 4 mm. The best
print results are obtained by vulcanizing the silicone onto a
aluminium or steel plate with a thickness of 4 mm. Grind smooth
afterwards (average roughness value Ra » 3,2 mm).

The counter-pressure plate (B) is to be attached parallel to the
linear movement of print unit and to focal line of the printhead (A).
Parallelism deviations to the focal line and indentations in the
counter-pressure plate of just 1/100 mm can cause a worse print
quality at these points.

The counter-pressure plate must be placed in such a way to get a
distance of 1 … 2.5 mm (see illustration) between the printhead
(A) and the upper side of the counter-pressure plate (B).
NOTICE!
A distance of 2 mm is recommended.

For the protection of printhead (A): related to the print length, the
counter-pressure plate (B) must be at least 5 mm longer in
advance and retardation, i.e. the printhead needs to touch the
counter-pressure plate in any case.

For the protection of printhead (A): related to the printhead width,
the counter-pressure plate (B) should be at least 5 mm wider on
both sides. Otherwise the edges of the counter-pressure plate can
cause damage to the printhead.
A B
Figure 13