Brief description

The CNC controller calculates a path setpoint profile so that the programmed path contour can be travelled over at a specific speed. The individual NC axes are accelerated and decelerated with specified acceleration values. Which dynamic settings on a machine produce the best results with regard to machining time and contouring accuracy depends, among other things, on the following influences:

• Load-carrying capacity of the machine construction
• Machine's vibration response
• Drive motor's torque response
• Drive controller's current limit

When calculating the profile, the CNC considers every machine axis participating in the motion. The contouring speed may have to be reduced to keep to the axis-specific speed and acceleration values. The machine axis with the poorest dynamics and the largest relative travel distance ultimately defines the maximum possible contouring speed.

This description of functions describes the parameter definitions of the dynamic response of motion. The specific additional dynamic parameters for spindle axes, for example the characteristic curve acceleration, are described in [Spindle].

Effectiveness

The axis-specific dynamic characteristics are parameters that apply to one single machine axis. If several NC axes interact in the contouring combination (contouring mode), the axis with the weakest dynamics and the largest relative travel distance defines the overall contouring dynamics.

Parameterization

The parameters of the characteristic dynamics quantities for each NC axis are defined in the axis parameter list [AXIS].

The parameters of the default type of the acceleration profile with the associated weighting effect are defined in the channel-specific parameter list [CHAN].