Five-axis machining
In the case of five-axis machining, the tool's orientation is altered in addition to its positioning motion. Depending on the contour description, larger-scale motion components can then alternately occur in the orientation or positioning axes. Here, continuity regarding the contour description must be given a wider interpretation. A continuous block transition in the x-y plane in the first derivation (speed) is generally discontinuous in the case of a tool that is perpendicular oriented to the contour in this plane. For example, a speed change in the orientation axes results in the case of motions with tangential circle -> line, line -> circle or circle -> circle block transitions with different radii.
Therefore, for as high a machining speed as possible, not only should the contour description have a harmonious profile, but also the orientation profile of the tool. If this is not the case, when the spline processes are used you must consider the fact that the generation of spline curves is deactivated when only coupled axes are moved. Therefore, a block transition cannot be smoothed with this process if the contour position and orientation changes in the first motion block and only the orientation is changed in the second motion block!
Such block transitions can be smoothed with the polynomial contouring processes.
A second possibility is to segment main axis motion in the CAD/CAM system and to detach the main axis motion in stages.