Wherever there is a need for accurate profiles and high quality surfaces, Peter Wolters of America Inc. says its MACRO series of 4-, 5- and 6-axis grinding machines for deep-groove grinding and high-performance grinding offer results. All machines feature precision linear guide ways, ballscrews and digital drives on all axes. The Siemens 840D CNC allows precision contour dressing and grinding and offers up to 5-axis interpolation. In addition, the MACRO machine range is based on the innovative Moving-Wheel-Head (MWH) concept. Therefore, all linear movements when positioning and grinding are performed by the grinding head. Compared to conventional moving column and moving table concepts, this design, according to the company, arranges the axes in a compact way, which results in optimal force distribution and minimal thermal variation, properties which result in best possible process control over a long lifespan.