Micro-Epsilon sensors for strip stabilization during hot-dip coating

In hot-dip coating systems, steel strips are coated with liquid zinc, zinc alloys and aluminum alloys in a continuous process. Due to the high speed of the strips, vibrations occur. To minimize this, electromagnetic stabilization systems from the market leader EMG are used, in which 10 to 16 inductive sensors of type EU40 from Micro-Epsilon are installed. During the coating process, the sensors record the vibrations as distance values without contact. These are transmitted to the electromagnetic stabilization system, which enables continuous monitoring of the entire system and thus ensures a reliable reduction in vibrations.

Measuring system for belt stabilization in hot-dip coating systems

The inductive sensors are extremely robust and can easily withstand the high temperatures and chemical and mechanical stresses of the system. They work with a large measuring range of 40 mm and are operated with the compact EddyNCDT 3020 industrial controller in a version adapted exclusively for the application and EMG (DT3029/EMG). The controller is also extremely robust and designed with a high IP67 degree of protection. Thanks to its compact design and high temperature resistance up to 105 °C, it can be integrated directly into the stabilization unit. High EMC immunity ensures that the sensor-controller unit delivers stable measurement results even in the vicinity of electromagnets. Thanks to the short cable length of 1 m and the excellent temperature stability of the system, the precision and stability of the output signal is increased enormously. This is transmitted to the control unit, which is up to 50 m away, via the analog current output.