Non-contact optical three-dimensional measuring, scanning and digitising are increasingly present in quality assurance systems. Simple scanning procedures, high density of data acquired in a single scan, and the possibility of integrated reverse engineering and inspection, are all advantages of optical scanning compared to conventional measuring methods. Due to the three-dimensional acquisition of measuring data, an optical scanner is often considered to be an alternative possibility for coordinate measuring machines. However, the accuracy of the measured data acquired by optical scanning (even with a high-end system) is still far below the level achieved by high-level coordinate measuring machines. This paper examines the possibilities of using a three-dimensional scanner for workpiece inspection. The first part presents a special field of workpiece inspection in which, even with currently achievable accuracy, optical scanning is a viable solution for the inspection of manufactured parts. In addition, the achievable dimensional accuracy of an optical scanner is tested by scanning several gauge blocks. In conclusion, a head to head comparison with a coordinate measuring machine is made by scanning and verifying a sphere. (C)2011 Journal of Mechanical Engineering. All rights reserved.

In order to improve the existing comparative procedure for calibrating internal dimensions, we have developed a new measurement set-up for traceable absolute measurements. It consists of a co-ordinate measuring machine (CMM) and a laser interferometer (LI). The LI serves as a traceable measurement system, while the CMM is only used as a guiding system for the measuring probe. Extended research focused on defining probe parameters such as diameter, bending and indentation, as well as probing head repeatability and other error sources. The final goal of the research was to determine uncertainty of measurement under existing laboratory conditions. The main outcomes of the research and final uncertainty of measurement are presented in this article.

In the terms of different methods of measuring the diameter of the gauge ring, in LTM can be offered five different methods for the same gauge ring. We can measure on 1D device, two different procedures on CMM, integration of LI and CMM and finally with optical scanner. In this article we will present three most usual.

Nacrtovanje rokov in zmogljivosti spada v podrocje vodenja proizvodnje. Terminiranje pomeni razporejanje omejenih virov opravilom v dolocenem casovnem obdobju. Torej gre za postopek odlocanja s ciljem optimizacije enegaali vec meril. Splosno obsega grobo (dolgorocno), srednjerocno, in podrobno (kratkorocno) nacrtovanje. Zadnjemu dajemo zaradi neposredne povezave z opravilno ucinkovitostjo najvecji pomen. V prispevku so predstavljeni razviti postopki terminiranja: prednostna pravila, omejeno iskanje v snopu in hevristicno preiskovanje glede na omejitve. Vse je podkrepljeno s prikazom na primerih.

The planning of dates and capacities belongs to the area of production management. Scheduling represents the allocation of scarce sources to tasks in a definite period of time. So it is about a process of deciding, with the goal of optimization, about one or more criteria. In general it includes rough (long-term), medium-term and detailed (short-term) planning. The last of these has the greatest importance because of a direct connection with operational effectiveness. Some developed scheduling procedures are presented in the paper i.e., the priority (dispatching) rules, the filtered-beam search, and the constraint-guided heuristic search. All this is substantiated with described examples. (c) 2007 Journal of Mechanical Engineering. All rights reserved.