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Inductive linear position sensor

The TF1 inductive linear position sensor by Novotechnik transmits measured signals via CANopen. The position is not detected via a magnetic but via an inductive position marker.

A CANopen interface is available (Photo: Novotechnik)

The sensor, available in lengths of 100 mm to 1000 mm, is relying on the German company’s touchless Novopad process. This makes the sensor impervious to the magnetic fields generated by large motors, hydraulic valves, or frequency inverters as the position is not detected via a magnetic but via an inductive position marker. Short dead bands at the beginning and end of the path ensure utilization of the measuring range, which represents a distinct advantage in tight installation settings.

According to the company, because of its characteristics, the linear position sensor is suitable for rapid positioning tasks. The measuring system features a refresh rate of up to 10 Hz, with a small contouring error. With optimized control dynamics, even rapid motion changes do not result in overshooting. At the same time, the precision-optimized sensor version features resolutions down to less than 1 µm. The measured signal is transmitted via CANopen, as an analog current/voltage signal, or digitally via SSI or IO-Link; an Ethernet interface is being developed. The teaching feature of the analog version allows for the reconciliation of the start and end positions as well as for a reversal of direction. Some typical applications are linear drives, injection molding and die casting equipment, presses and punches for sheet metal processing, packaging or wood processing equipment, and position sensing in rapid motion units or production lines.


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