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2-18 Theory of Operation
NovaJet 500/630/700 Series Service Manual
On the NovaJet 500/505/630/700 printers a media drying fan assembly
is attached to the lower part of the printer legs that is used to speed up
the drying time of the ink that is deposited onto the media. This is to
ensure that the ink is completely dry before the media is rolled onto the
take-up reel. The 42 inch model has five drying fans, while the 60 inch
version has seven.
The drying fan assembly has been designed to keep power consumption
down to a minimum by only activating the amount of fans that are
required to dry the size of media that is loaded on the printer.
The fans will not actually engage until a print command is first estab-
lished. This commmand can be from a sent print job or any onboard
commands that require printing to complete that function. The fans
will automatically shutdown approximately 20 minutes after the print
is complete.
The drying assembly can also be disabled through the printers firmware
via the control panel.
This drying fan assembly is part of the mechanical take-up system that
is optional on the NovaJet 500 and 630 series printers.
On the NovaJet 750 printers a thermal media drying assembly is used
instead of the fan assembly as on the other models. It accepts control
commands from the MPWA that turns the heating elements on and off.
It also has two fans located underneath the plenum to push the heated/
unheated air out of the holes facing the platen to dry the media. The
drying assembly can be operated with or without the heating elements
being turned on.