Grinding wheel axis and workpiece axis should be so high to ensure that the spherical roundness. Grinding patterns are usually used to determine the contour of the error. If the grinding sphere surface was convex pattern, indicating that the grinding wheel to participate in the lower half of the grinding, the center of the wheel below the center of the workpiece, this time, the center wheel should be adjusted to make the center of the workpiece height, until the mill The surface of the sphere is cross-shaped. The error requirements in 0.003-0.004mm within.

Grinding outside the sphere, the wheel frame to turn a certain angle, so the wheel bore size of the dressing should be completed before the adjustment of the machine. Grinding wheel in the grinding process, do not need to dress the hole, as long as the end of the grinding wheel with sand dressing can be, so that both the grinding wheel to restore sharp, but also to ensure that the wheel bore size unchanged. Grinding wheel after grinding in a timely manner in order to facilitate the processing to ensure quality. As the spherical grinding wheel axis and workpiece axis can not be absolutely equal, so the workpiece will have a small step, affecting the accuracy of the workpiece, this time, the top of the spherical drill a hole less than 1mm to avoid.