New generation launched

As part of its ambitious Nextgen initiative, sensor manufacturer Posital has given its complete portfolio of Ixarc magnetic encoders a major update. While incremental devices based on the new technology platform have already been available for several months, the company is now also launching a new generation of absolute encoders.

The new Ixarc absolute encoders, which are available as single and multi-turn models, feature improved performance (up to 18-bit resolution) and an optimised Wiegand package that includes a new ASIC developed in-house as the logic controller for the battery-free multi-turn system. The first next-generation Ixarc absolute encoders are available with SSI communication interfaces. Other interfaces, including CANopen, fieldbus and industrial Ethernet, will be introduced in the coming months.

A game-changer in the Nextgen upgrade of the entire magnetic encoder portfolio is the overarching switch from Hall sensor technology for single-turn sensing to advanced TMR (Tunnel Magneto Resistance) technology. TMR offers more precise measurement of magnetic field changes, lower temperature sensitivity and lower energy consumption. The bottom line is that TMR-equipped Ixarc encoders have higher resolution and more stable performance over a wide range of operating conditions. Posital is one of the first encoder manufacturers to widely adopt TMR technology, which has already proven itself in many automotive applications.

A key innovation in the Ixarc multiturn upgrade is the introduction of a new ASIC developed in-house to support battery-free revolution counting. Each time the encoder shaft completes a revolution, a Wiegand sensor connected to the ASIC provides both a signal pulse and sufficient electrical current to energise the counter circuitry in the ASIC. With this energy-autonomous counting system, each shaft rotation is accurately recorded in a non-volatile memory - even if the rotations occur when the system's power supply is unavailable. The Wiegand ASIC was developed together with sister company Ubito. "Our own ASIC - and the associated entry into the actual basic sensor technology - is a big step for us," says Jörg Paulus, Posital's European managing director. "By developing our own technologies for all elements of the Wiegand system, we reduce our dependence on external suppliers and increase product availability. The more know-how and competence we build and maintain internally, the better we can -- as a 'Wiegand Company' -- develop our portfolio for the benefit of our customers."

The Nextgen upgrade of multiturn encoders also includes an updated series of Wiegand SMD mountable sensors, which are manufactured in a new, fully automated production line. The production is designed for an annual capacity of over one million units. The new manufacturing system, operated by Ubito, is the result of a multi-million dollar investment and offers both further improved product quality and a more secure supply of the essential Wiegand sensors.

Despite their innovative technology, the new Ixarc absolute encoders are fully mechanically and electrically compatible with previous models. "We have deliberately designed the Nextgen launch to ensure a smooth transition for our customers," Paulus emphasises.

"Our robust and versatile Ixarc magnetic encoders have become a market favourite thanks to their compact design, durability and maintenance-free, battery-free multiturn functionality," concludes Paulus. "The launch of the Nextgen models underlines our role as a technology leader in magnetic precision encoders! We also maintain our position as the first address in Wiegand technology for sensor technology and energy harvesting."

Translated with DeepL