Development of a drop-on-demand system for multiple material dispensing

L. Li*, J. H. Ng, J. Y.H. Fuh, Y. S. Wong, H. T. Loh, W. Feng, M. Saedan, J. Sun, S. T. Thoroddsen, L. Lu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations


In drop-on-demand (DoD) printing, each type of actuation mechanism for the dispensing nozzle has its own uniqueness and limitation in dispensing material properties. To meet the growing requirement of complex parts in industry with multiple properties of materials, this paper proposes a multinozzle drop-on-demand (DoD) inkjet printing machine that can dispense multiple material using different type of nozzles. Starting from single nozzle dispensing, a DoD machine generally consists of motion stage, dispensing unit, and visualization system. In multi-nozzle DoD machine, real-time synchronization among the multiple dispensing units is also one of the crucial factors for successful printing with a multi-nozzle machine. A microcontroller-based synchronizer has been designed to synchronize the printing process from multi-nozzle with respect to a movable position stage. This real-time control contributes to accurate micro-droplet deposition. In addition, some measures have also been proposed to improve the machine compactness and save the expense cost, such as the multiplexer, mechanical mounting and so on. Integrated with these techniques into the DoD machine, the developed multi-nozzle system can achieve accurate deposition with a wide range of functional materials using various types of dispensing print heads.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE International Conference on Automation and Logistics, ICAL 2008
Number of pages6
StatePublished - 2008
Externally publishedYes
EventIEEE International Conference on Automation and Logistics, ICAL 2008 - Qingdao, China
Duration: Sep 1 2008Sep 3 2008


OtherIEEE International Conference on Automation and Logistics, ICAL 2008


  • DoD inkjet printing
  • Multi-nozzle machine
  • Multiple material dispensing
  • Synchronizer

ASJC Scopus subject areas

  • Artificial Intelligence
  • Hardware and Architecture
  • Control and Systems Engineering


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