The basic layout of process monitoring elements

On-line (in-process) monitoring

• Parallel to the ongoing process (software or hardware-based)

DTA (digital drive data via profibus) – torque and feed force

• Sufficient for approx. 80% of monitoring cases (breakage, missing parts, worn tools)

Acoustic emission

• Used for small tools and collision monitoring
• Used especially with multi-spindle operation

Spindle/collision monitoring

• Sensor system provides data on spindle vibrations and crashes

Measurements directly on tool holder

• Direct recording (DMS) near to point of action (wireless sensor system)
• Influences from the machine do not influence the results