• Drop Shape Analyzer – DSA Inkjet

    Drop Shape Analyzer – DSA Inkjet

  • Precise fine-positioning system for the printing head

    Precise fine-positioning system for the printing head

  • Ink management for long-term measurements

    Ink management for long-term measurements

  • Sophisticated optical system for imaging drops and nozzles

    Sophisticated optical system for imaging drops and nozzles

Drop Shape Analyzer – DSA Inkjet

Watching out for precision printing

High quality inkjet printing makes the perfect interplay between printing head control and the ink indispensable. We have developed the Drop Shape Analyzer – DSA Inkjet to support you in reaching this goal. The instrument incorporates an innovative optical system for analyzing the jet stream of ink droplets produced by the print head. Drop formation and analysis are exactly synchronized by triggering drop generation.

Innovative optical setup for imaging and analyzing drops

High-quality microscope optics focus on the jet of drops and delivers a clear video image. The DSA Inkjet uses an imaginative method to precisely analyze ink drops of just a few picoliters at flight speeds of up to 40 m/s: Two different-colored light flashes in quick succession double-expose the drop in one and the same video frame of a color camera. By separating the color channels, discrete images of the same drop are obtained at intervals of a few microseconds. This opens up unprecedented opportunities of recognizing and analyzing drops automatically, providing a vast number of instructive result parameters:

  • Speed of the drop
  • Drop volume
  • Trajectory (deviation from the perpendicular)
  • Ligament length
  • Number of satellite drops

By receiving these results as a quick feedback to the print parameter settings, they can be used to test a particular ink or to optimize the printing process. As an alternative to the trigger function, the DSA Inkjet can use its own printing electronics for directly adjusting the waveform with an easy-to-use editor. Available for compatible print heads, this feature is ideal for standardized test procedures for ink formulations..

Video | Next Generation Drop Watching

Next Generation Drop Watching | DSA Inkjet

Nozzle observation and automated image scale determination

Wetting the print head during printing can deflect the drop jet and clog the nozzles by drying out. To make unwanted ink drops visible at the nozzle rows, separate optics and illumination as well as a second camera provide a video image of the nozzles from below.

Another innovative development makes it easier to measure real drop dimensions such as volume or ligament length.The image scale is automatically determined with the aid of a reference grid regularly projected into the camera image. This eliminates the need for image scale determination when changing the zoom, saving time and ensuring reliable results.

Thoughtful setup for practical suitability

The hardware components of the DSA Inkjet provide for safe and versatile use. Inserting the printing head and focusing on single nozzles is carried out in a few easy steps thanks to the three-dimensional fine-positioning system. The instrument is also equipped with a storage tank to supply the print head with ink during long-term measurements, whereby the drops are collected in a waste container. A suction device prevents harmful vapors. Thanks to a UV protection cover, UV-curing inks such as those used for 3D printing can also be examined.

Measurement options

  • Automated image analysis providing results such as volume, speed, trajectory, ligament length, and number of droplet parts
  • Parallel video observation of the nozzles from below
  • Setting waveform and frequency for compatible print heads and watching the resulting drop behavior live
  • Fully automated image scale determination
  • Long-term measurements and analysis of UV-curing inks

Products Inkjet Analysis

  • DSA Inkjet  |  inkjet analysis

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