36 Elektor Electronics 11/2003 Often a mechanical operation is required in an application to accurately position a load or device. While a conventional DC or AC motor can be used, it is difficult to determine the exact position of the load, motor speed, or how much total motion has been produced, unless external positioning sensors, encoders, servo loops, and controlling devices (brakes or clut...

Motor stepper tidak sama dengan motor AC maupun DC konvensional yang berputar secara kontiniu,tetapi perputaran pada yaitu incremental atau langkah per ( step by ), sehingga dapat memberikan putaran lebih presisi dan akurat.Perancangan pembuatan system pengendali arah berbasis ICL293D sangat menarik untuk dipelajari.Dalam perancangan ini menggunakan metode eksperimen,sehingga dalam simulator di...

This technical report presents the recent progress in the design and construction of a closed loop automated seating system. Preliminary test results are reported. The system is designed to measure seating surface forces and control the seating surface geometry of a seated human. It uses force information as feedback to determine custom seating contours which produce desired seating characteris...

Pneumatic stepper motors can be used to actuate MR safe robotics and other devices. Due tight space requirements inside the MRI scanner, it is useful combine several individual into a single device with an efficient shared actuator mechanism, called multiple concentric shaft pneumatic motor. The demonstrated “multimotor” prototype has six geared shafts driven by four cylinders controlled five l...

This paper presents a modular approach to motion control using a microconlroller-based stepper motor driver. As an application of the driver, an inexpensive and portable one-dimensional robot was built to automate an existing experimental setup for measurement of adsorption isotherms using the McBain-Bakr technique. Automatic recording of position versus time yields data for the sludy of adsorp...

Today, modern technologies tend to develop rapidly. The application of advanced inventions, principles, systems and approaches allows simplify the production process, reduce cost manufacturing finished products, replace monotonous manual work with automated devices. basis power drive such are electric motors: permanent magnets, direct current, stepper, etc. When developing any electromechanical...

Designs are constructed that limit the number of treatment combinations within subsets of factors. Such designs came to our attention in the context of machine assembly experiments [1,2]. For example, to improve a stepper motor, we plan a 2 design to investigate four rotor factors and a similar 2 design to investigate four stator factors. The product of these two arrays to study the eight facto...

We study a wide-field motion-sensitive neuron in the visual system of the blowfly Calliphora vicina. By rotating the fly on a stepper motor outside in a wooded area, and along an angular motion trajectory representative of natural flight, we stimulate the fly's visual system with input that approaches the natural situation. The neural response is analysed in the framework of information theory,...

A method capable of delivering relative optical path length metrology with nanometer precision is demonstrated. Unlike conventional dual-wavelength metrology, which employs heterodyne detection, the method developed in this work utilizes direct detection of interference fringes of two He-Ne lasers as well as a less precise stepper motor open-loop position control system to perform its measureme...