Planar grinder

A planar grinder includes a base having a bowl and a rotating drive plate to operably support a grinding wheel. A head is configured to support a specimen holder and has a first drive for the rotational drive of the specimen holder and a second drive for moving the head and specimen holder toward and away from the drive plate. The head has a sleeve that is larger than the specimen holder. A cover is disposed over the bowl and has an opening larger than the sleeve, so that the sleeve fits through the opening when the specimen holder is moved toward the rotating drive plate. The grinding wheel is mountable to the plate in a single radial orientation only. A dressing system is operably connected to a controller to monitor the current of the drive plate motor and/or the head first drive, and actuates the dressing system based upon the current drawn by the drive plate motor and/or the head first drive motor falling below a predetermined value. 一种平面研磨机包括基部，所述基部具有碗状物和旋转驱动盘，以可操作地支撑砂轮。头部被配置以支撑试样架并且具有用于所述试样架的旋转驱动的第一驱动，