Leibinger JET3 up, Operating Manual

Page: 70 / 412

Page 68 Job Editor Group 8
Release R1.06 JET3up
6.2 Functional principle
6.2.1 Method of working
The JET3up 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.
INFORMATION
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 on a network storage device.
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
lA
(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.