Overview

Task

To monitor position lag, check the difference between the command position and the actual position value of a CNC axis.

If a configurable limit is exceeded, the CNC generates an error message and the axis is stopped.

Characteristics

The position lag monitor checks the correct functioning of the position controller.

For example, it can detect the following problems:

• Dynamic axis overload due to excessive velocity or acceleration settings
• Mechanical changes to axes, e.g. increased friction due to damaged bearings or guides
• Errors in the axis position measuring systems

Parameterisation

The position lag monitor is configured for each individual axis in the axis parameter list.