Controller design of desktop-size NC machine tool with multi-application function

Fusaomi Nagata, Takanori Mizobuchi, Keigo Watanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this paper, a desktop-size NC machine tool is first presented to have multi-application function, such as 3D-machining modes with and without handling a machining force, and profiling-control modes with and without using stick-slip motion. The NC machine tool consists of three single-axis devices with a high resolution of 1 μm in position. A ball end mill called router bit or a thin wood-stick tool can be attached to the tip of the z-axis. The proposed machine tool realizes compliant motion required for the profiling control along a desired trajectory. The profiling-control mode can be applied to the lapping process of a metallic LED lens cavity. Next, a control strategy with fine stick-slip motion is further added to the profiling-control system to improve the lapping performance. The fine stick-slip motion is generated orthogonally to the direction of the tool movement. Generally, the stick-slip motion is an undesirable phenomenon to be eliminated in precision machineries. However, the proposed machine tool employs the fine stick-slip motion to partly regulate slight finishing energy. The effectiveness of the machine tool is demonstrated through an actual machining test of a wood material and a lapping test of a metallic LED lens cavity.

Original languageEnglish
Pages (from-to)1029-1041
Number of pages13
JournalInternational Journal of Advanced Manufacturing Technology
Issue number9-12
Publication statusPublished - Dec 2011


  • CL data
  • Desktop-size NC machine tool
  • Force control
  • LED lens cavity
  • Multi-application function
  • Position control
  • Profiling control
  • Stick-slip motion
  • Weak coupling control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering


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