External sensor-less on-machine measurement of workpiece for ultra-precision machine tools

Y. Kakinuma, T. Kamigochi, Y. Murakami

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


The on-machine measurement of a machined workpiece has numerous advantages such as reducing the man-hours and operatordependent measurement errors, and improving work-efficiency. In this paper, we propose an external sensor-less on-machine measurement system by only utilizing internal servo information in order to add a workpiece-measurement function to ultraprecision machine tools without increasing the cost. The cutting force observer developed for monitoring the process has the ability to estimate the external force with a resolution of 0.05 N based on servo information. Sensor-less contact force control with the cutting force observer is applied to an on-machine measurement system. To evaluate the performance, several tests are carried out. The results show that the proposed on-machine measurement system is effective at measuring the accuracy of the machined form.

Original languageEnglish
Pages (from-to)40-43
Number of pages4
JournalProcedia CIRP
Publication statusPublished - 2013
Event2nd CIRP Global Web Conference on Beyond Modern Manufacturing: Technology for the Factories of the Future, CIRPe 2013 - Patras, Greece
Duration: 2013 Jun 112013 Jun 12


  • Measurement
  • Sensor-less force control
  • Ultra precision machine tool

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering


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