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Compact flexible linear stepping motors.

Cheng-Lung Chen1, Shen-Yun Chu2, Yao-Te Tsai1

  • 1Department of Mechanical Engineering, National Yang Ming Chiao Tung University, 300, Hsinchu City, Taiwan.

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|April 17, 2025
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Summary
This summary is machine-generated.

Researchers developed thin, flexible linear stepping motors (FLSMs) using printed circuit boards. These compact actuators offer unlimited stroke length and high force output, ideal for wearable devices and robotics.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Robotics

Background:

  • Flexible actuators are crucial for wearable and mobile devices.
  • Existing actuators often face limitations in form factor and operational range.

Purpose of the Study:

  • To develop novel flexible linear stepping motors (FLSMs).
  • To investigate the performance characteristics and potential applications of these FLSMs.

Main Methods:

  • Fabrication of FLSMs using 0.1 mm thin flexible printed circuit boards.
  • Design allowing for stacked sliders to enhance force output.
  • Theoretical analysis of unlimited operational stroke length.

Main Results:

  • Achieved a maximum speed of 500 mm/s and a step size of 25 µm.
  • Demonstrated a force constant of 743 mN/A.
  • Obtained the highest reported volumetric force constant (5.94 mN/A(mm)³).

Conclusions:

  • FLSMs offer a flexible and compact actuation solution.
  • The design is suitable for space-constrained applications like robotic fingers and VR headsets.
  • The achieved volumetric force constant sets a new benchmark in the field.