Abstract: In a surface grinding method in which a grinding wheel is dressed with a dressing board on a chuck table by advancing the grinding wheel from a dressing start position and a workpiece on the chuck table is ground by advancing the grinding wheel, the dressing start position is calculated by measuring a thickness of the dressing board and a thickness of the grinding wheel, and the grinding start position is calculated by measuring the thickness of the grinding wheel after the dressing of the grinding wheel with the dressing board.

Abstract: In a surface grinding method in which a grinding wheel is dressed with a dressing board on a chuck table by advancing the grinding wheel from a dressing start position and a workpiece on the chuck table is ground by advancing the grinding wheel, the dressing start position is calculated by measuring a thickness of the dressing board and a thickness of the grinding wheel, and the grinding start position is calculated by measuring the thickness of the grinding wheel after the dressing of the grinding wheel with the dressing board.

Abstract: [Problem] To enable efficiently grinding a workpiece of a hard brittle material, a difficult-to-cut material, or others at a moderate high load. [Solution Means] When surface-grinding a workpiece by a grinding wheel, a grinding load is monitored while the grinding wheel is reduced in cut-in speed when the grinding load rises and the cut-in speed is increased when the grinding load falls. Respective cut-in speeds with which the grinding wheel has a slower cut-in speed at a larger grinding load have been set in a manner corresponding to a plurality of respective load thresholds of the grinding load, and after starting grinding at a predetermined speed, the grinding wheel is decelerated or accelerated to a corresponding cut-in speed every time the grinding load rises or falls to a predetermined load threshold.