26 Printer systems
Printer systems
Heating system
The type of ink used in this printer (Latex) require heating in order for the ink to be cured. The heating
system applies this heat through a Dryer Assembly and a larger Curing assembly. Temperatures are kept
at a target level depending on the type of substrate and amount of ink fired via a temperature sensor,
which feeds back information to the Heater Control assembly (Petisa) located at the rear of the printer.
Components
Heaters Control Assembly
The Heaters Control assembly is the controller PCA of the Dryer and Curing Heaters. The assembly is
located at the rear of the Printer in an enclosure designed to shield it from the heat generated. This
assembly contains the Heater Control PCA, also known as Petisa, and the Chinda board which is inserted
vertically in a slot on the Heater Control board. On the side of the enclosure is a fan for cooling the system.
Dryer Module:
The Dryer module heats up the print zone to 40-55ºC while printing. The main objective is evaporating
most of the water content of the ink and therefore, providing the correct temperature for satisfactory image
quality.
The two resistors in the dryer provide 2400W, reaching a working temperature of 650-700C while
printing. Subsequently it is not safe to open the window while the unit is printing or just after the end of a
plot, since the dryer cover can easily reach 200ºC in intensive usage.
Curing Module
The Curing Module fixes the latex ink (cures) at typically around 80-120ºC , depending on the substrate
for satisfactory durability.
The two independent resistors provide a total 1900W split as follows: 1200W (Curing overdrive, closest
to the printer) and 700W (Curing Output, furthest from the printer).
The following cross section shows the
heating subsystems:
Dryer Fans and Curing Fans
The Dryer fans and Curing fans provide an airflow parallel to the media to reach a higher evaporation
rate at the print zone. The airflow wipes away the vapors from the media surface, improving radiation
efficiency.
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