Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Soft Sensing Based In Situ Control of Thermo-Fluidic Processes in DoD Inkjet Printing

Version 1 : Received: 22 March 2020 / Approved: 24 March 2020 / Online: 24 March 2020 (08:30:10 CET)
Version 2 : Received: 20 April 2020 / Approved: 22 April 2020 / Online: 22 April 2020 (09:54:45 CEST)

How to cite: Das, A.; Princen, M.; Shokrpour, M.; Khalate, A.; WEILAND, S. Soft Sensing Based In Situ Control of Thermo-Fluidic Processes in DoD Inkjet Printing. Preprints 2020, 2020030355 (doi: 10.20944/preprints202003.0355.v2). Das, A.; Princen, M.; Shokrpour, M.; Khalate, A.; WEILAND, S. Soft Sensing Based In Situ Control of Thermo-Fluidic Processes in DoD Inkjet Printing. Preprints 2020, 2020030355 (doi: 10.20944/preprints202003.0355.v2).

Abstract

This paper introduces a closed-loop control strategy for maintaining consistency of liquid temperature in commercial Drop on Demand (DoD) inkjet printing. No additional sensors or additional actuators are installed in the printhead while achieving the consistency in liquid temperature. To this end, this paper presents a novel in situ sensing-actuation policy at every individual liquid-nozzle, where the jetting mechanism has three distinct roles. It is used for jetting liquid droplet onto the print media based on the print-job. It is used as a soft sensor to estimate the real-time liquid temperature of the jetting nozzle. While not jetting liquid, it is used as a heating actuator to minimize the gradient of liquid temperature among nozzles. The soft sensing based in situ controller is implemented in an experimentally validated digital twin that models the thermo-fluidic processes of the printhead. The digital twin is scalable and flexible to incorporate an arbitrary number of liquid-nozzles, making the control strategy applicable for future designs of the printhead.

Subject Areas

Inkjet Printing; Thermo-Fluidic Processes; Spatially Interconnected System; Soft Sensing; Optimal Control

Comments (1)

Comment 1
Received: 22 April 2020
Commenter: AMRITAM DAS
Commenter's Conflict of Interests: Author
Comment: Extended paper, with now permission from other authors.
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