在无心磨的磨削过程中,工件是由导轮带动着旋转,工件的转这是由导轮的转速进行控制的。在以往的无心磨机床中,实际上只当导轮由交流电机驱动时,才能使导轮的转速在磨削过程中维持不变。当导轮使用直流电机驱动时,因为所使用的调速装置是不可逆的系统,导轮在磨削过程中会反过来 Grinding in the heartless grinding process, the workpiece is driven by the guide wheel rotation, the workpiece is rotated by the guide wheel speed control. In the past centerless grinding machine, in fact, only when the guide wheel driven by the AC motor, the guide wheel speed can be maintained during the grinding process. When the guide wheel is driven by a DC motor, since the speed governor used is an irreversible system, the guide wheel will reverse during grinding