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Mathematical model for feed drive system in microscopic motion area

Yamazaki T.

Archives of Materials Science and Engineering

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2008

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Vol. 33, nr 1

35-38

EN

Purpose: Our objective is to develop an entirely new the feed drive system with the accuracy of tens nanometers and the stroke of tens millimetres achieved by only one mechanism. Design/methodology/approach: The dynamic driving torques can be measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. The mathematical model of the feed drive system that considers this dynamic behaviour is proposed. Findings: We make hysteresis phenomenon clear in the range from 2 μm to 100 μm by the nonlinear spring characteristics. Taking the friction model into account, the driving torque can be formulated. The proposed friction model represents successfully the experimental results for the sinusoidal wave within the ranges of amplitude from 2 μm to 100 μm. In case that the amplitude is 1 μm, though the amplitudes of the driving torque are slightly different, the curve shows the similar shape. Research limitations/implications: The results of this research covers the feed drive system with the AC servo motor and rolling guide. But, because the dynamic behaviour the rolling element was analyzed, it can be also applicable to the feed drive system with rolling element. Practical implications: This paper presents more details of driving torque in microscopic motion area, so that the performance of the feed drive system with rolling elements can be improved. Originality/value: The originality of this research project is to develop an entirely new feed drive system with the one mechanism and with the high accuracy.

2

Dynamic behaviours of driving torque of machine tools in microscopic motion

Yamazaki T., Kaneko S., Sato R.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 20, nr 1-2

523-526

EN

Purpose: This paper presented more details for control analysis of the dynamic behaviors of the feed drive systems that have been widely used in machine tools. Design/methodology/approach: In order to analyze the nonlinear behaviors of the feed drive system in microscopic motion, the dynamic driving torques were measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. Findings: The experimental results showed that the distortion of the driving torque response to the sinusoidal wave input of the microscopic displacement becomes gradually evident as the input amplitude increases. With the particular input amplitudes of 200 mm and over, it can be found that the driving torque response for the displacement show the periodic response. It is considered in the AC servo motor used by experiment that the vibration is caused whenever the motor rotates by 20 degrees. It is consider that it is affected by the structure of the motor. Research limitations/implications: The results of this research covered the feed drive system with the AC servo motor and rolling guide. However, because the dynamic behavior the rolling element was analyzed, it was also applicable the feed drive system with the linear motor and rolling guide. Practical implications: This paper cleared more details of driving torque in microscopic motion, the performance of the feed drive system with rolling elements would be improved. Originality/value: The objective of this research project was to develop the feed drive system with the one mechanism and with the high accuracy.

3

Dynamic behaviours of driving torque of machine tools in microscopic motion

Yamazaki T., Kaneko S., Sato R.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 15, nr 1-2

88--93

EN

Purpose: This paper presented more details for control analysis of the dynamic behaviors of the feed drive systems that have been widely used in machine tools. Design/methodology/approach: In order to analyze the nonlinear behaviors of the feed drive system in microscopic motion, the dynamic driving torques were measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. Findings: The experimental results showed that the distortion of the driving torque responses to the sinusoidal wave input of the microscopic displacement become gradually evident as the input amplitude increases. It was evident that the driving torque depends on the input amplitude, but not the input frequency. With the particular input amplitudes of 5um and over, it was clear that the trajectories for different initial driving torques show the same patterns. Research limitations/implications: The results of this research covered the feed drive system with the AC servo motor and rolling guide. However, because the dynamic behavior the rolling element was analyzed, it was alse applicable the feed drive system with the linear motor and rolling guide. Practical implications: This paper cleared more details of driving torque in(at) microscopic motion, the performance of the feed drive system with rolling elements would be improved. Originality/value: The objective of this research project was to develop the feed drive system with the one mechanism and with the high accuracy.

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Postęp w obróbce skrawaniem. Cz.1.: Obróbka z dużymi prędkościami.

Oczoś K.E.

Mechanik

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1998

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R. LXXI, nr 3

109-124

PL

Istota i zastosowanie obróbki z dużymi prędkościami (HSM). Systemy narzędziowe stosowane w procesach HSM. Materiały narzędziowe i narzędzia skrawające. Złącza wrzeciono-narzędzie. Systemy obrabiarkowe HSM. Szybkoobrotowe elektrowrzeciona. Układy napędu posuwowego. Charakterystyka wybranych obrabiarek z bezpośrednim napędem liniowym. Sterowanie procesem HSM. Nowe konstrukcje obrabiarek typu hexapod dla HSM.

EN

The essence and application of High-Speed Machining (HSM). Tool systems used in HSM processes. Cutting tool materials and design. Spindle tool interface design. HSM-machine tool systems. High speed spindles. Feed drive systems. Characteristic of the machine tools equipped with linear motors. HSM process control. New haxapod machine design for HSM.