micro unit 6:
predictive maintainance
In this small micro unit the topic predictive maintainance and the implementation in an application of a smart factory will be shown and discussed.
The example will be the turnover station from FESTO which is locatated on a CP Lab conveyor belt. The problem of all maintainance responsible person is to find a compromise between acting not to early and exchange an expeensive componement or actig to late and the machine will be damaged or unproductive a to long time period.
Here you can see the setup mode screen of the turning – station (see also “turning station” in learning unit 1). On this screen you can manually activate or deactivate the signals in order to control the solenoid valves.
In the automatic mode you can observe the automatic activation or deactivation of the signals.
In both cases the numbers at the bottom of the description e.g. “Lift” indicate the number and time of strokes (movements of the cylinder). At the moment we are on the setup screen of the application. Lets analyze the displayed informations from the page.
For example we will have a closer look at the Lift actuator. Each actuator shows the time (in milliseconds ms) which elapsed time between Signal-Start and Sensor for the finished process and as well the display of the number which counts the stroketime for this actor
This informations can be of crucial importance for predictive maintenance purposes. For example if the sealings of a cylinder have to be replaced after a million of strokes or the time duration between the command and the adjacent sensor Signal exeeds a certain limit. Therfore the operator has to check the performance of the actuator and sensors.