RACK AND PINION SYSTEM RAM DRIVE The natural evolution of the technology had allowed to conceive these heavy duty Slotting Machines equipped with CNC on the 4 working axes. A very innovation solution is the controlled Z axis on the models CAMS 500E, 500EA and 500EA(850). CNC system on the 4th cutting axis is offering many considerable advantages, as follows: - drastic reduction of the setting time; - significant inprovement of quality of the cutting motion. In fact the Brushless motor drive is transmitting a continuous motion with constant torque from beginning to end stroke; - the cutting motion is most regular in comparision with the conventional Crank and Connecting Rod drive and this means a minor tool consumption.