Data storage device for use with a numerically controlled machine tool

A data storage apparatus for use with a numerically controlled machine tool, comprising a control device for controlling a plurality of actuators of the machine tool and a plurality of sensors for sending sensor signals indicating a machine state of the machine tool to the control device, wherein the data storage apparatus comprises:

• a first interface unit for transmitting data with the numerical control device of the machine tool,
• a first storage medium for storing configuration data indicating a group of machine tool sensors as well as read-out and processing rules for sensor signals of the group of sensors of the machine tool,
• a read-out unit for reading out sensor signal values of the sensor signals of the group of sensors of the machine tool specified in the configuration data via the first interface unit on the basis of the read-out rules specified in the configuration data,
• a data processing unit for processing the sensor signal values read out by the read-out unit into aggregated sensor system data on the basis of the processing rules specified in the configuration data,
• a second storage medium for storing the aggregated sensor system data processed by the data processing unit, and
• a second interface unit for transmitting data to an external data processing device via which the external data processing device can access sensor system data stored in the second storage medium.