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In this paper, aggregation mechanism of nano dots in the thermal dewetting method is studied theoretically based on the total free energy of the system. Affective factors of dot size is revealed, and control method of aggregated dot size is studied.

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In this study, the superconducting nanowire growth by focused-ion-beam chemical vapor deposition was investigated in order to achieve the three-dimensional superconducting nanodevice fabrication. As a result, we demonstrated the superconducting nanowire growth by FIB-CVD using precursor of phenanthrene (C14H10) mixing tungsten hexacarbonyl (W(CO)6). Low temperature electrical properties of tungsten-containing carbon nanowires fabricated by FIB-CVD will be reported in details.

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A drill processing to the difficult to cut material such as ceramics, hardened steel, glass and heat-resistant steel is widely requested in the industrial world. Furthermore the drilling process becomes more and more difficult in the case of that the requested hole diameter is less than one millimeter. In order to achieve requirements for drilling process, ultrasonically assisted machining is applicable. Ultrasonic vibration assisted machining techniques are suitable to machine difficult-to-cut materials precisely. The ultrasonic vibration assisted sub-millimeter drilling process reduces the cutting forces and prevents severe wear of tools. In this report, high speed camera with synchronizing strobe LED light sources is adopted to visualize the process of ultrasonic drilling based on the photoelastic analysis. The effect of the ultrasonic vibration on drill was experimentally considered.

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This paper deals with the fabrication of micro PCD drills with a nominal diameter of 300 μm and their application. The fabricated drills were used in the drilling into SiC. In the drilling test, characteristics of the drilling and effects of ultrasonic vibration were investigated. Differences of drilling accuracy under the conditions of with and without ultrasonic vibration were not clear but there were differences of tool wear.

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We realized absolute encoder by a method to record the grating of the incremental encoder at plural gradation. In addition, by a method to remove the harmonic distortion of the projection pattern of coarse periodic grating, we balanced a high interpolation accuracy with installation easiness. In this report, we explain a principle, a constitution summary, development to the two-coordinate encoder, the measurement example of the interpolation precision and propose the applicable field.

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The high precision gears are strongly required for advanced motion and power transmission, and high precision gear measuring machine (GMM) has been developed recently. The establishment of the traceability system has been needed, and the charactristic improvement of the detector has been needed. In this paper, the deviation factor in case of measuring a simple form artifact is analyzed, the control method which makes measuring force constant is proposed in order to reduce the influence, and the effectiveness is confirmed by experimental results.

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To develop a high precision Coordinate Measuring Machine called M-CMM, it is important to evaluate stage's kinematic error. In this research, we propose multi-probe method for M-CMM calibration which can separate reference mirror form and kinematic error of stage. In the before papers, we measured the pre-experiment linear stage with three laser interferometers and one autocollimator. In this paper, we reduce uncertainty from environment utilizing differential interferometer and alignment error.

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In recent years, the CMM (Coordinate Measuring Machine) quickly has been spreading in the manufacturing industry. With this phenomenon, the environmental condition and installation site of CMMs has been changed from the temperature control room to the workshop environment and the production line without air conditioning. However, even in severe environment the demand to high accuracy measurements by CMM has been enhancing still more. Therefore, the methods to evaluate and realize the high accuracy measurements by CMM in workshop environment have been investigated. In this paper, we clarify the factor of scale error and propose the effect and correction method of temperature measurement errors using relative scale error.

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We propose a dynamic observation concept to pretend aged degradation of water-soluble coolant. The dynamic observation system can monitor the whole volume of water-soluble coolant on real time in coolant concentration, appearance, existence of dissolved substances by using a CCD camera and optical sensors.

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We develop a super-heterodyne interference system for absolute length measurements of several meters. The light sources are multiple laser diodes and an optical frequency comb. The repetition frequency of the optical comb is stabilized to GPS, which is 58.418 MHz with a stability of 10^-11. The wavelengths of the two laser diodes are 1.54 μm and 1.60 μm, and the frequencies are phase-locked to the different modes of the optical comb with different offset frequencies Δ₁ and Δ₂. The super-heterodyne signal of laser diodes and the optical comb will be (Δ₂ -Δ₁). The two-beam interference system for length measurement is based on a Michelson interferometer and the multiple-wavelength method is used. The synthetic wavelength can be changed by locking the frequencies of the laser diodes to different modes of the optical comb, and then the step-by-step measurement can be realized. The final stability of the system will be determined by the acetylene stabilized laser.

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We developed a Fabry-Pérot etalon (FPE) to select high-frequency parts of repetition-frequency modes of a short pulsed, mode-locked fiber laser in the wavelength of 1.55 μm. The 5-GHz repetition-modified laser is transmitted to a fiber-type interferometer. The generated interference fringes have a temporal coherence interference fringe pattern at each 30 mm of CMM′s movement and can make positioning in space. The performance of CMM can be verified by comparing with interference fringes directly.

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The use of micro fiber for the transmission of the forces and the movements in robotic micro arms has been investigated from several researchers all over the world. The interest in this kind of actuation modality is based on the possibility of optimizing the position of the actuators with respect to the moving part of the robot, in the reduced weight, reliability, simplicity in the mechanic design and flexibility with many DOF. This paper proposes a novel flexible micro arm that uses BioMetal Fiber (BMF) actuator. The BMF has very high durability and exhibits stable operating characteristics. It is being thin but capable of producing a powerful force. This platform can enable new medical devices for a capsule robot and for minimally invasive surgeries. Although, the flexible micro arm has multi-links, it can simplify many links as a partial curve. This paper presents kinematics of the flexible micro arm and experiment of bending property.

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