Browsing by Subject "double bass"

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Methodical Design of a 3D-Printable Orthosis for the Left Hand to Support Double Bass Perceptional Training
(University of Texas at Austin, 2019) Borstell, D.; Walker, N.; Kurz, S.
The evolution of Additive Manufacturing (AM) in the past decades has opened up its use to a wide range of new applications where conventional manufacturing methods dominated. Orthoses are medical devices, mostly used on legs or arms after injuries or surgery. Amongst other functions, they limit the possible movement of limbs or joints to prevent excessive movements or loads during remobilization. Their manufacturing process is predominantly manual and conventional using e.g. plaster casts and materials like foam, wood and textiles. Playing the acoustic double bass requires precise positioning of the left hand fingers on the fingerboard. Perception of the finger spacing is very important for good intonation. Different educational approaches have therefore been made to kinesthetic and perceptional training. Miniaturization and low forces allow applying additive manufacturing technology to a previously conventional device leading to a new approach to design a perceptional training device for the left hand: an individually shaped orthosis, which is lightweight, low cost, and adjustable and which can be worn during instrument practice.
Optimization of a Worm Gear Assembly Design for Additive Manufacturing
(University of Texas at Austin, 2021) Borstell, D.; Georg, M.-C.
Worm gears are widely used to transmit power at predominantly low speeds and highspeed ratios. Their self-locking characteristic makes them unique to many drive applications. Industrial power requirements are causing forces and tensions mostly prohibiting thermoplastic materials in worm gear drive trains. Double basses are tuned using a worm gear assembly made from machined steel and brass or cast bronze. Neglectable power requirements, few hours of operation, esthetic expectations and the classic luthier’s approach to making such an instrument by hand have excluded the double basses’ tuning assembly from all engineering approaches regarding optimal design, efficiency and costs. Manufacturing the traditionally designed double bass worm gear assembly using Additive manufacturing processes requires the application of general design rules and the rules of Design for Additive Manufacturing (DFAM) resulting in an optimized gear assembly regarding weight, costs and design properties.