Method and apparatus for measuring the droplet frequency response of an ink-jet print head

Zhi-Ru Lian; Ming-Ling Lee; Yi-Hsuan Lai; Hung-Lien Hu; Chiehwen Wang

doi:10.1117/12.389450

28 June 2000 Method and apparatus for measuring the droplet frequency response of an ink-jet print head

Zhi-Ru Lian, Ming-Ling Lee, Yi-Hsuan Lai, Hung-Lien Hu, Chiehwen Wang

Proceedings Volume 4080, Input/Output and Imaging Technolgies II; (2000) https://doi.org/10.1117/12.389450
Event: Photonics Taiwan, 2000, Taipei, Taiwan

Abstract

To speed up the printing speed of an inkjet printer, the manufacturers normally focus on increasing the droplet frequency response. Hence, it has become a very important technique to measure the droplet frequency response of an inkjet printhead. A magneto-electric method is proposed to measure the droplet frequency response. The magneto-electric apparatus contains a metallic detecting plate and a magnetic ring with a gap of about 100 micrometers filled with a nonmagnetic insulating material. The magnetic ring itself is made of a high-permeability alloy consisting of about 78% nickel and 22% iron. When an ink drop jetted from a nozzle makes a contact with the metallic detecting plate, which is perpendicular to the nozzle plate of a printhead, a current is conducted through the detecting plate immediately, and detected as a portion of expected signal. The expected signal is then processed by a signal processing circuit for counting the number of jetted drops, and determining the maximum droplet frequency response of the inkjet printhead as a function of the driving frequency of an applied voltage across the printhead.

Citation Download Citation

Zhi-Ru Lian, Ming-Ling Lee, Yi-Hsuan Lai, Hung-Lien Hu, and Chiehwen Wang "Method and apparatus for measuring the droplet frequency response of an ink-jet print head", Proc. SPIE 4080, Input/Output and Imaging Technolgies II, (28 June 2000); https://doi.org/10.1117/12.389450

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