Mach3 does not have the five-axis linkage of RTCP. In fact, it only links the bai3 axis. The mach3 system only performs three-axis interpolation. The specific rotation calculations are implemented in the post-processing of the programming software. The actual rotation is to rotate a bit to the left of the rotation axis and then perform XYZ. Three-axis interpolation. Rotate the axis coordinates a little bit and interpolate again. The result is that the G code is quite large, and the curved surface is not a continuous movement into a stepped movement.