EKI / EMI
High-precision strip position measurement
The inductive EMI system is used for high-precision strip centre guidance when a measuring accuracy ≤ ± 1 mm is required, and/or for measuring the strip width and sensing the strip edge positions. The compact measuring frame made from anodised extruded aluminium sections is provided with inductive sensors which are moved by an electric motor at both edges of the strip. In the lateral part, the two sensors arranged below and above the strip are mechanically coupled by means of a synchronising shaft, they follow the strip edges in rigid position control loops. An integral position transducer continuously monitors the positions. Based on these positions and the sensor covering, the strip edge positions and the strip width are calculated. The evaluation and drive electronics including the digital strip controller are installed in a separate housing.
The high-precision EKI system with an edge sensing accuracy better than ± 1 mm is mainly used in strip edge guidance systems on coilers. The compact measuring frame made from anodised extruded aluminium sections is provided with inductive sensors which are moved by an electric motor at one strip edge. In the lateral part, the two sensors arranged below and above the strip are mechanically coupled by means of a synchronising shaft, and they follow the strip edge in a rigid position control loop. An integral position transducer continuously monitors the positions. Based on the captured position and the sensor covering, the strip edge position is calculated. The evaluation and drive electronics including the digital strip controller are installed in a separate housing.
