REA JET SK 16, Руководство пользователя

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Copyright © 2006 REA Elektronik
Seite 7
Rationalisierung

Entwicklung
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Automation
Elektronische Geräte und Systeme
7 System specification
The present REA-JET print head represents the DOD (
D rop- O n- D emand) technology. The DOD
principle provides a droplet of ink only when ink is needed to print an image or a character.
Contrary to this technology is the principle of CIJ (continuous ink jet) printers where a continuous
jet of ink droplets is generated and only certain droplets which form a character or image are
deflected to arrive on the printing surface (canvas).
The advantage of a DOD system lies in its robustness and sturdiness, the ease of use and the
wide range of applications.
The REA-JET system components can be combined in multiple ways and allow a flexible
combination to meet most customer application requirements.
Technical specification
The print head is made from a pipe which in combination with the back and front panel forms the
housing for the mechanical parts.
Please also
see Fig. 7.1 and Fig. 7.2 on the following pages.
The following components are located on the back panel:

Female connector for print head cable

Purge button

Ink connector (a single one for a standard print head, two for a pigmented print head)
The nozzleplate is integrated in the front plate.
Apart from the difference of being a standard or a pigmented print head the heads are constructed
the same way.
Standard print heads are used for dye based inks. These inks don´t need to be circulated
wherefore one ink connector on the back panel of the print head is adequate.
When pigmented inks are used which are mixed with solid particles it is necessary to evenly
dispense these particles at any time. This is the reason why pigmented inks are processed by
using a pigmented ink supply unit. A pump makes sure that the pigmented ink is constantly
circulating between the print head and the ink supply unit. Therefore a pigmented print head has
two ink connectors. One for the ink feed line from ink pump to print head and one for the ink return
from print head to ink pump.
Nozzle plates are available in different nozzle sizes to apply the optimum amount of ink for the
various areas of application. The following nozzle sizes in micron are available:

80 µm

130 µm

180 µm

270 µm

350 µm