Method for monitoring a jetting performance of a print head
First Claim
1. Method for monitoring a performance of a jetting device, the jetting device being configured to expel droplets of an electrically conducting fluid wherein at least a part of the conductive fluid is positioned in a magnetic field, the method comprisinga) providing an electrical actuation current in the part of the conductive fluid positioned in the magnetic field, thereby generating a pressure wave in the conductive fluid;
- characterized in that the method further comprisesb) detecting a resulting electrical current, which electrical current is induced by a residual pressure wave in the part of the conductive fluid positioned in the magnetic field, thereby obtaining a detection signal; and
c) based on the detection signal determining whether the jetting device is in an operative state.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a method for monitoring a performance of a jetting device, the jetting device being configured to expel droplets of an electrically conductive fluid wherein at least a part of the conductive fluid is positioned in a magnetic field, the method comprising providing an electrical actuation current in the part of the conductive fluid positioned in the magnetic field, thereby generating a pressure wave in the conductive fluid; characterized in that the method further comprises detecting a resulting electrical current, which electrical current is induced by a residual pressure wave in the part of the conductive fluid positioned in the magnetic field, thereby obtaining a detection signal and based on the detection signal determining whether the jetting device is in an operative state. The invention further relates to a printing device, employing the described method.
-
Citations
5 Claims
-
1. Method for monitoring a performance of a jetting device, the jetting device being configured to expel droplets of an electrically conducting fluid wherein at least a part of the conductive fluid is positioned in a magnetic field, the method comprising
a) providing an electrical actuation current in the part of the conductive fluid positioned in the magnetic field, thereby generating a pressure wave in the conductive fluid; characterized in that the method further comprises b) detecting a resulting electrical current, which electrical current is induced by a residual pressure wave in the part of the conductive fluid positioned in the magnetic field, thereby obtaining a detection signal; and c) based on the detection signal determining whether the jetting device is in an operative state. - View Dependent Claims (2, 3)
-
4. Printing device for printing a droplet of an electrically conductive fluid, the printing device comprising
a fluid chamber for holding an amount of the electrically conductive fluid; - and
an actuation assembly configured to expel droplets of the electrically conductive fluid from the chamber through a nozzle, the actuation assembly comprising a magnetic field generating unit for generating a magnetic field in at least a part of the fluid chamber; and an electrical current generating unit for generating an electrical actuation current in the electrically conductive fluid in the part of the chamber provided with the magnetic field, thereby generating a pressure wave in the conductive fluid in said part of the fluid chamber, an electrical signal detecting unit for detecting a resulting electrical current, which resulting electrical current is induced by a residual pressure wave in the part of the conductive fluid positioned in the magnetic field, thereby obtaining a detection signal. - View Dependent Claims (5)
- and
Specification