Functional Principle; Method Of Working; Drop Creation - Leibinger JET3 User Manual

Group 6
The print head contains all mechanical, electronical and hydraulic components which are
required for the creation of print out. It is connected with the hydraulic cabinet by a
flexible umbilical.

6.2 Functional principle

6.2.1 Method of working

The JET3 works in accordance with the continuous ink jet process. In this a
constant ink jet is emitted from a jet nozzle which is broken down into a series of
equal size drops under the influence of mechanical oscillations.
If required these drops are individually charged up electrostatically and deflected
into a constant electrical field depending on the charge. As a result not just one
point but rather a line of points can be applied contact-free with one jet. If the
product used is moved vertically to the drop deflection two-dimensional patterns
(characters) can be created.
The drops that are not required for a programmed inscription are not charged and
flow uninfluenced through the electrical deflection field into a gutter. In the gutter
the drops are sucked up by a suction pump and fed back into the ink tank.
Depending on the application alphanumeric data and graphics can be entered with
the TFT touch display.

6.2.2 Drop creation

During the drop creation the ink is pressed through a jet nozzle under pressure and
at the same time modulated in such a way by highly frequent sinus oscillations that
are imposed on the drop that it attaches itself to the nodal points of the oscillations
and breaks down into individual drops at a specific distance l A (please see the
following figure "Creation of a character") from the jet. The oscillations are created with
an oscillatory system that is excited by a Piezo oscillator.
Release R1.03e
Operation – Functional principle
Data for font and texts are stored in the device (even in the event
of power failure). If required it can be called up, altered or deleted
quickly and easily.
Further more, all jobs, fonts and graphics can be saved as a back-
up e.g. on a USB-stick or a SD-card.
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LEIBINGER JET3