M39s is a very high precision measuring system for checking matched cylindrical components, with the facility to provide a graphical display of the surfaces to be matched. You can inspect the internal diameter of the bore and the external diameter of the shaft/ pin along the entire length of the surface. The resulting measurements can be used for checking and grading individual parts, or for checking the matching condition of a pair of parts. Applications Scanning technology is an essential tool for making dimensional and form checks on matching mechanical parts with very tight clearance tolerances (Fig. 1 next page). The richness of metrological data and the immediacy of the graphical representation of the surface profiles enable you to fully control the critical production processes of these components. The M39s can be used in manually loaded systems, or in fully automatic systems, thanks to the ease with which it can be integrated with part handling equipment. The range of possible applications includes: • Quality control stations beside the production line • Pre-process measurement (e.g. to determine the ideal diameter to machine a male part to match with finished female part or vice versa) • Post-process measurement (e.g. to provide an immediate check of the results of a critical machining operation, with the possibility to provide tool compensation feedback to the machine tool) • Stations for grading parts • Measurement stations in assembly lines (e.g. to determine the grade of parts required to obtain the required clearance) The use of precise, interchangeable standard components, together with the careful design of the basic system guarantees excellent metrological performance over a period of years in typical production environments.

Measurement Technology The standard model includes: - Air gauging plug for checking internal diameters - Air gauging ring for checking external diameters Special applications with contact/electronic measurement are also available. Measurement Principle A gauging plug is moved at a constant speed inside the bore to be gauged and the diameter reading is continuously stored. For gauging external diameters, generally the part itself is moved within the fixed ring gauge (Fig. 2). Drive System The slide which moves the gauging plug or the part is driven by a high-precision recirculating ball-screw....

Hardware: Standard Configuration for M39s Applications can be provided using Marposs PC-based systems E9066NTM Flat Panel or E9066TTM with Gage BoxTM or with Easy BoxTM E9066N Flat Panel E9066T 12.1" TFT SVGA display (brightness 250 cd/m 2) 15" TFT XGA display (brightness 250 cd/m2) Intel® Pentium® III 1GHz 256MB RAM Intel® Celeron® 1.2GHz 256MB RAM 40 GB hard disk drive 4 serial ports (2 x RS232, 2 x RS232/422/485) 3 serial ports (2 x RS232, 1 x RS232/422/485) Built-in Ethernet port (10BaseT, 100BaseT with RJ45 connector) 2 x USB1.1 ports (USB2.0 beginning from 2006) 4 x USB ports (2 x USB1.1,...

Measurement Calculations From the samples acquired during the scanning cycle various measurements can be calculated: - Max, min and mean diameters calculated over the total length or over sections of the scanned profile - Diameters in programmed positions along the length of the part - Maximum variation of diameter calculated over the total length or over sections of the scanned profile - Evaluation of the taper or barrel-shape error in accordance with various criteria - Evaluation of the matching clearance in accordance with various criteria (e.g. max, mean, min clearance, or clearance in specified...