Continuous Data recording of internal and external data in the FAGOR CNC

The Power-OM project has centered the diagnose of the machine health in the sensor fusion of internal and external data. The Fagor CNC is already open for interconnection of different applications from customers but two different features of the CNC have been developed related with the main important points of the project. The Power-Om project relies on a well defined concept to diagnose a component, the fingerprint, a specific test that is component oriented, and tries to find a relationship between the health of that component and the usage conditions. Fagor AOTEK ‘s main contribution to that aim is a new feature in the CNC that allows the definition of what data to record and what strategy to follow when recording it. As the sample time can be configured and the basic (minimum) time is the basic time of the CNC, this same application addresses both needs of the Power-OM project, the fingerprint process for health assesment, and the continuous data recording to find possible fault roots. While not necessary for Power-OM (because recorded data are meant to be used by Tekniker’s application or uploaded to the Kasem platform) AOTEK has developed a visualization tool that works in any modern browser and allows easy access to recorded data at machine’s site or remotely by any portable device like a smartphone or tablet (figure 1). As the Power-OM name itself suggests, power or energy is one the most important signals to look at for condition based monitoring. For motors controlled by the Fagor drives the torque and power signals are already available. For external motors and for monitoring of the whole machine tool energy, external sensors are needed. Such a sensor has been connected to the CanOpen bus allowing continuous energy monitoring . The system provides a value for every of the three phases (Power_U, Power_V and Power_W in the first figure) that can be composed in a TotalPower value as in the figure. AOTEK has developed a small html5 page that can be displayed in any modern browser . This page (figure 3) presents in real time the power consumption of the three axis, the Spindle and the total machine tool consumption. Being a web page, it can be served to portable devices like smartphones or tablets, what allows visualization at any place in the plant, well in the spirit of industry 4.0 .