# Spindle monitoring

## Overview of monitoring mechanisms for an NC spindle

- Dynamic monitoring (speed, acceleration) [FCT-D1]
- Revolution monitoring
- Position monitoring [FCT-A3]
- Position lag monitoring [FCT-A1]
- Time monitoring [FCT-A3]
- Monitoring the direction of rotation

## Speed

The parameter P-AXIS-00217 defines the actual speed at which nominal speed is regarded as reached.

The parameter P-AXIS-00216 defines the speed limit under which the zero speed is assumed.

## Direction of rotation

If a preferred direction P-AXIS-00224 and a direction of rotation P-AXIS-00031 are specified, all commanded directions of rotation are checked for matching with the preferred direction.

If they do not match, the error message P-ERR-60254 is issued and the function reverts to error state.