LPKF ProtoMat 93s Manual
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7.9 Milling layout films
Secure the film base (sheet of perspex or glass) on the machine table with
masking tape.
Lay the film material on the base with the coated (matte) side facing upwards.
Now smooth the film material firmly and level on the film support until the air has
been completely expelled.
Now stick down the film on all four sides with transparent adhesive tape (which
must not stretch) to form an air seal. There must not be any air bubbles between
the film and the base. The milling depth can now be set at the film edge. It can be
checked by milling a frame around the film area (manual movement).
The speed of movement should be reduced to about 15 mm/sec.
Switch on extractor, but only to half power, by extracting "secondary air" on the
suction nozzle or, if there is one, reducing the power on the electronic extractor
control. The film milling program can now be started.
Film material comes in DIN A3 and A4 formats (special sizes available upon
request).
Important: the film coating is easily scratched and is water soluble, so do not let it
come into contact with water. The film can be recopied with a coloring device upon
request. For further notes see chapter entitled "Practical tips".
7.9.1 Correction agents
Gravure films can be corrected with Duroscal Korrekturschicht rot, which is easy to
use. Paint in the problem areas with it, leave to dry for about 5 minutes and then
further process the gravure film in the normal way.
The corrected areas can only have their coating removed with a quick acting
coating remover.
Attention! Follow the safety instructions on the correction agent container!
