|4622779||Method and apparatus for speed control of a grinder|
A signal representative of the mass moment of inertia of a grinding wheel and its drive motor is integrated for a fixed time interval during start-up of the motor beginning when the motor speed or the motor current has reached a predetermined small value,...
A device for automatically limiting the steplessly adjustable speed of a drive motor for the spindle of a grinding machine to a speed which is the maximum permissible motor speed for the grinding wheel currently being used has a motor-driven speed regulat...
|3935677||Metallographic polisher with speed control|
A metallographic polisher includes a control circuit for providing a selectable constant speed for the polisher under varying load conditions. A tachometer provides electrical signals representative of the speed of rotation of a polishing wheel, which sig...