Single-surface grinding machine

A single-surface grinding machine provided by the utility model comprises the components of a copper fixed disc of which the bottom is provided with a rotating shaft that is connected with a frequency converter motor; monitors which are arranged on the rotating shaft; and a surface polishing machine of which one end is connected with a cutter that is arranged above the copper fixed disc. The monitors are composed of an original-point sensor and an angle detection encoder. According to the single-surface grinding machine, the original-point sensor and the angle detection encoder are added, thereby realizing a fixed-angle positioning function. Before slotting each time, slotting positions are kept same always. A first slotting depth is reduced, and slotting in multiple times is adopted, thereby preventing damage of the copper fixed disc in slotting.