Grinding machine with movable grinding wheels

A grinding machine comprising:

• a base having a main part and an end case connected to one end of the main part;
• a driving unit connected to the end case and including a first motor which has an output shaft, a groove formed axially in a distal end surface of the output shaft of the first motor;
• a grinding unit having one of two ends thereof connected to the end case, another one of the two ends of the grinding unit cantilevered above the main part, the grinding unit including a hood and a grinding wheel set, the hood being mounted above the grinding wheel set, the grinding wheel set including a central axle which has a slide, the slide being located in the groove of the output shaft of the first motor, a driving wheel connected to the central axle;
• an adjustment device including a second motor which is connected to an eccentric unit, the eccentric unit including an eccentric axle and a bearing, the eccentric axle extending through the bearing, and the bearing located in a recess formed to the driving wheel, and
• the driving wheel being driven by the eccentric unit of the adjustment device to move the grinding wheel set of the grinding unit.