Wi-Fi Based Electronic Notice Board

The main objective of this project is to develop a cost effective notice board system using a Wi-Fi based controller card controlled by any Android OS smart phone or through PC. Modern information is gradually shifting from conventional notice board to centralized control system, involving Wi-Fi system. In this paper we have proposed a system through wireless transmit notices on a notice board using Wi-Fi. Wi-Fi can pass information for about 100meter distance. Wi-Fi data rate has 1 or 2 Mbps.

Design of a 5-Axis CNC Machine Tool Applied to Dental Restoration

In this work, a 5-axis machine tool used for dental restorations is designed. In view of the fact that its special characteristics of the applications, the mechanical structure and main part of the machine tool have been designed and chosen with careful calculation. The machine tool is equipped with a high speed electro-spindle driven by computerized velocity and can rotate at a maximum speed of 60,000 rpm, which driving unite is equipped with servomotor and optical grating for its better motion precision control. Meanwhile, by using the motion controller card, the machine is controlled with a closed-loop numerical control system. Based on the theory of multi-body system, and through analyzing the matrix of the position transformation and the displacement transformation, a model for positioning errors is put forth for error compensation in programming way. The grinding programs enable exact copies of the object to be fabricated. The satisfactory results show this machine tool has excellent performances.

Space Arc Trajectory Planning Based on PCI Motion Control System

This paper presents a method using the PCI motion controller which provides function of space linear interpolation to implement space arc trajectory planning on three dimensional motion platform. While make plane constraint to space spherical, we get space arc trajectory in Cartesian Coordinate System. Using the constraint arc by appropriate of precision discrete, function of space linear interpolation and the movement buffer nested in controller card to implement space arc movement. Writing control interface by using VC++ and actually validated on XYZ-three dimensional motion platform. The result confirmed feasibility and accuracy of this method.

Research and Development on Miniature Teaching Computer Numerical Control Lathe Machine

An open double coordinates computer numerical control (CNC) system was developed, which was based on PC and PMAC motion controller card. A miniature and teaching CNC lathe machine was developed with a simple structure, low cost, small volume and suitability for teaching. The CNC system had the advantages of 2-axis linkage, program editing, manual operation, inching operation, simulation processing operation, automatic operation and dynamic display of the tracing. The system was based on the Windows XP platform. Its interface was friendly and it was convenient to manipulate.

Design of a Small Automated Telescope for Indian Universities

We have constructed a computer controlled telescope using a 0.36-m f/11 Celestron optical tube assembly for teaching and research applications. We have constructed a heavy duty fork-type equatorial mount fitted with precision machined 24 inch drive disks for both axes. These are friction driven by stepper motors through one inch rollers. We have used an open loop control system triggerable by an ST-4 CCD camera to acquire and track any target object. Our telescope can home in on any target within a range of two arc-minutes. We have employed a commercial stepper motor controller card for which we have written a user friendly pc based telescope control software in C. Photometry using a solid state photometer, and imaging by an ST-6 CCD camera are possible.We consider that this project is suitable for those wishing to construct some parts of a telescope and understand the principles of operation. A simpler model of this telescope could use DC motors instead of stepper motors. We shall be happy to send our design diagrams and details to those interested. This project was funded by the DST, and was assisted by IUCAA, Pune.