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Method for monitoring a jetting performance of a print head

  • US 8,721,032 B2
  • Filed: 09/04/2012
  • Issued: 05/13/2014
  • Est. Priority Date: 03/18/2010
  • Status: Active Grant
First Claim
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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.

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