The Right Encoders for Tight Spots

POSITAL has expanded its IXARC series of rotary encoders with a new line of 20 mm diameter multiturn magnetic encoders developed for motion control applications where installation space is at a premium. With a total housing length of just 31 mm, these compact units are POSITAL’s smallest multiturn encoders. They provide the full performance profile of the company’s other encoder products with significantly smaller footprint. Moreover, these tiny encoders are virtually maintenance-free, thanks to their battery-free Wiegand-based rotation counting technology.

The new encoders are based on POSITAL’s latest TMR (Tunnel Magnetoresistance) sensing technology, offering up to 19-bit single-turn resolution combined with excellent signal stability and low power consumption. The sensing module is supported by an advanced signal processing ASIC, which provides precise interpolation and multiturn data handling while minimizing power requirements.

As with other multiturn members of the IXARC family, the 20 mm models incorporate POSITAL’s Wiegand energy-harvesting system for non-volatile rotation counting. Each complete shaft rotation triggers a Wiegand pulse, generating sufficient electrical energy to power the internal counting electronics. This enables multiturn position tracking over a 16-bit range (65,536 revolutions) without the need for batteries or external power backup. Position data is reliably recorded, even if motion occurs when system power is unavailable.