The technological treatments necessary in the programming for wire cutting were introduced, including the treatments to the workpiece structure, the installation position of the workpiece on the workbench, the going direction of the programming, the selection of the start point, and the influence of the lagging in the additive program to the programming.

The angular variable mirror (AVM) to be used to control the power balance of beams of “SHENGUANG Ⅱ” system will affect the light beams, including vertical displacement of optical axis, alteration of equivalent length of optical path, additional optical distance, and the curve of wave surface.

The computational formula for the additional path difference of Newton s rings with the method ofinterference fring digitization is derived.

For solving the torsional vibration problem of the work spindle caused by the additional rotation in helical gear shaping,a tooth-leap shaping method of helical gears was presented,its working principle,and mathematical model were introduced,and the method presented was verified by an example.