Reverse Engineering (RE) is a research field where physical models are measured or digitised in order to be reconstructed for finally obtaining a CAD model. Regarding the large range of existing approaches, the paper deals with features known by their mathematical equation (vectorial or Cartesian). Typically, these equations are obtained when a part composed by features is measured using a touc...

A high precision Micro-CMM (Coordinate measuring machine) is under development at the School of Instrument, Hefei University of Technology, in collaboration with National Taiwan University. The expected measuring range is 25 x 25 x 10 mm and the resolution is about 10 nm. For the enhancement of machine accuracy, some new design concepts are introduced, such as the arch-bridge and the co-planar ...

In order to decrease the measuring cycle time on the coordinate measuring machine (CMM) a robot workstation for the positioning of measuring objects was created. The application of a simple 5-axis industrial robot enables the positioning of the objects within the working space of CMM and measuring of different surfaces on the same object without human intervention. In this article an upgrade of...

Introduction: Today different uses of multileaf collimators(MLC) in different techniques of radiotherapy are common. Due to the use of this facility it is possible to have maximum radiation dose to target volumes and minimum radiation dose to critical tissues surronding treatment volumes. But there are numerouse Linear accelerators in IRAN without MLC. Because of high price of...

An alternative technique for the geometric test of machining centres was developed, to congregate metrological reliability with operational and economical advantages, when comparing to methods classically used for such task. A touch probe is used on a 3-axis vertical machine center to check against artifacts calibrated on a coordinate measuring machine (CMM). By comparing the results obtained f...