Reducing Build Variation in Arched Guitar Plates

  • Eddy Efendy
  • Mark French
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


The objective of volume production is to produce identical products with little to no build variation in their parts. However, in instrument manufacture, this can be a challenging task due to the natural variation in wood properties. The purpose of this paper is to illustrate an approach to reduce build variation in the production of arched plates for acoustic guitars by using CAD/CAM software and the CNC machine. To accurately machine the arched plates, a family of curves called curtate cycloids was used during the design phase. The paper will also discuss the effort to reduce build variation during the manufacturing process by placing the arched plates under load while being machined. A series of arched back plates has been produced using this approach, and the build variation, as measured by resonant frequency, is notably reduced.


Resonant Frequency Wood Property Longitudinal Cross Section Partial Vacuum Longitudinal Arch 
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  1. 1.
    French, Mark. Engineering the Guitar Theory and Practice. Springer 2009Google Scholar
  2. 2.
    U.S. Forest Product Lab. Handbook of Wood and Wood-Based Materials for Engineers, Architects and Builders. Hemisphere Publishing 1989. Also available in updated form electronically at:
  3. 3.
    French, Mark. A Different Way of Defining Body Shapes. American Lutherie, No. 88, Winter 2006.Google Scholar
  4. 4.
    Playfair, Quentin. Cremona’s forgotten curve. Strad, 110(1315):1194–1199, November 1999Google Scholar
  5. 5.
    Benedetto, Robert. Making an Archtop Guitar. Centerseam Publising 1994Google Scholar
  6. 6.
    Evan, J., Lindsay, W. Managing for Quality and Performance Excellence. Thomson 2008Google Scholar
  7. 7.
    Leissa, A.W. Vibration of Plates, NASA SP-160, 1969Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Eddy Efendy
    • 1
  • Mark French
    • 1
  1. 1.Department of Mechanical Engineering TechnologyPurdue UniversityWest LafayetteUSA

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