RTM's laser measurement systems allow the dimensional check of cylindrical objects through the evaluation and record of outer/inner diameter/dimension and of their overall length. Non-contact triangulation systems allow recording the distance of the workpiece from the sensor. Measurement is obtained by comparing signals of couples of opposed sensors to gauge a defined dimension By performing a vertical scanning through a controlled axis, it is possible to record the internal and external profile of the workpiece, along a complete cross section of the piece. By turning the gauge around the workpiece axis, it is possible to increase at will the numbers of sections to be measured, in order to detect contour defects (circularity, parallelism, …).
Calibration is achieved by a masterpiece of known dimension, periodically introduced in the machine. Contour gauging is obtained with acceptable accuracy and definition depending on the sensor type and on the surface condition and geometry. A wide range of possible situations exists, each one tackled with a particular strategy. The line may work in automatic procedure and groups of products can be easily managed through simple software modifications.