Velocity curve in the contouring section

Depending on axis parameterisation and the application, it may be necessary to influence the velocity curve in the contouring section. In the default definition, the contouring section is travelled at maximum permissible path velocity. If the axes have strongly different dynamics, this could lead to an unacceptable excitation of vibrations in the machine because path velocity is adjusted in the contouring section.

The characteristic in the contouring section can be adjusted by specific control commands in the NC command #CONTOUR MODE.

In the example below, the block transition from N6 to N7 is contoured by polynomials which are moved in the contouring section at maximum velocity, i.e. the velocity is adjusted here by different axis dynamics. The transition from N9 to N10 is also contoured but without any velocity adjustment. This leads to a constant path velocity in the contouring section.

Programming Example

Velocity curve in the contouring section