WHEEL DRESSING AND TRUING IS THE KEY TO GEOMETRICAL AND DIMENSIONAL ACCURACY AND SURFACE QUALITY OF THE WORKPIECE, AND TO THE ACHIEVABLE MATERIAL REMOVAL RATES. THIS PAPER DESCRIBES MAJOR ADVANCES IN ROTARY DRESSER PROCESS TECHNOLOGY IN RECENT YEARS, WITH PROFILE ROLLERS FOR CONTINUOUS DRESSING OF CONVENTIONAL WHEELS, FORM ROLLERS FOR DRESSING CONVENTIONAL AND CBN WHEELS AND PROFILE ROLLERS FOR PROFILE DRESSING CBN WHEELS. IT INVOLVES ALSO DRESSER DESIGN AND PROCESS STRATEGY INNOVATIONS INVOLVING CLOSE COLLABORATION WITH MACHINE BUILDERS. THIS HAS ENABLED AUTOMATION OF DRESSING CYCLES--EVEN FOR DRESSING CBN WHEELS--SUCH THAT NO FURTHER SHARPENING OPERATION IS REQUIRED AFTER TRUING THE WHEEL.