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

Group 8

6.2 Functional principle

6.2.1 Method of working

The printer 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.
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 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.
JET3 Series
Job Editor
INFORMATION
Page 63
Release 2.02