Automotive supplier scans parts with diamond styli

Engineers are always pushing the limits of what is technically feasible, placing even more exacting demands on precision from one year to the next. Several years ago, this prompted the automotive supplier Pankl, whose portfolio includes connecting rods for race cars, to switch from discrete-point measurements to precise scanning. But since they were in constant contact with the workpieces being measured, the silicon nitride stylus tips were wearing down at a rate of up to one micrometer per day – too much to ensure the precision of the measurement results without additional testing. Thus Pankl requalified its scanning styli twice daily, and each time this meant the coordinate measuring machine was out of action for 15 minutes. Moreover, replacing an old stylus with a new one once per day was not an uncommon occurrence.