Research Papers

Velocity-Regulated Path Planning Algorithm for Aerosol Printing Systems

[+] Author and Article Information
Bradley Thompson

Department of Mechanical Engineering,
The University of Alabama,
Box 870276,
Tuscaloosa, AL 35487-0276
e-mail: bathompson4@crimson.ua.edu

Hwan-Sik Yoon

Department of Mechanical Engineering,
The University of Alabama,
Box 870276,
Tuscaloosa, AL 35487-0276
e-mail: hyoon@eng.ua.edu

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received June 27, 2014; final manuscript received February 22, 2015; published online March 18, 2015. Assoc. Editor: Z.J. Pei.

J. Manuf. Sci. Eng 137(3), 031020 (Jun 01, 2015) (7 pages) Paper No: MANU-14-1350; doi: 10.1115/1.4029976 History: Received June 27, 2014; Revised February 22, 2015; Online March 18, 2015

Aerosol printing is one of the common methods used in printed electronics. In this study, an improved path planning algorithm is developed for an aerosol printing system. The continuous aerosol stream provided by a printing nozzle requires a constant relative velocity between the printer head and substrate in order to evenly deposit materials. To ensure consistency, the proposed algorithm confines speed fluctuations by predetermining potential velocity errors and compensating with a novel scheme. The path planning algorithm can control motion of an XY stage for an arbitrary printing path and desired velocity while minimizing material waste. Linear segments with parabolic blends (LSPB) trajectory planning is used during printing, and minimum time trajectory (MTT) planning is used during printer transition. Simulation results demonstrate the algorithm's improved capability to maintain the desired velocity while minimizing print time.

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Fig. 1

Aerosol printer configuration

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Fig. 2

Acceleration, velocity, and position profiles for an example LSPB trajectory between two points

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Fig. 3

Acceleration, velocity, and position profiles for an example MTT between two points

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Fig. 5

Motion stage velocities and resulting print speed for continuous printing of consecutively joined segments

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Fig. 4

Parameters used to define desired printing path

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Fig. 6

Velocity profiles produced by algorithm and resulting x and y position (shutter closed in shaded regions)

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Fig. 7

Printer trajectory planning and shutter timing algorithm flowchart

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Fig. 8

Arbitrary set of segments used for planning example trajectory

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Fig. 9

Shutter timing, velocity profiles, and resulting print speed for vT=vmax case (shutter closed in shaded regions)

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Fig. 10

Shutter timing, velocity profiles, and resulting print speed for vT = 0.1 mm/s case (shutter closed in shaded regions)

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Fig. 11

Planned trajectory for vT=vmax case

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Fig. 12

Planned trajectory for vT = 0.1 mm/s case




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