... roller60mmDriving modeOil cylinder and servo system independently control the upper roller and down roller, 2 motors driven gearbox, 4 roller linkage ... of 3 rollers. 1st, 2nd, 3rd axis are driven by Variable Frequency Motor, 4th axis rotate passively and stably, the CNC program ... thin profiles. 1st, 4th axis are driven by Servo Motor to go up and down, 2nd, 3rd axis are driven by hydraulic force to go ...