Magnetic shaft encoder

Citation

(2007), "Magnetic shaft encoder", Sensor Review, Vol. 27 No. 4. https://doi.org/10.1108/sr.2007.08727dad.002

Magnetic shaft encoder

Magnetic shaft encoder

The MA2 (Figure 2) is a ten-bit miniature absolute magnetic shaft encoder that provides 1,024 unique, positions per 3608 of shaft rotation. The MA2's magnetic single chip sensing technology makes it ideal for applications existing in harsh environments.

Figure 2 The new small size, low cost MA2 magnetic shaft encoder

The MA2 is available in two output versions, analog and pulse width modulation (PWM). The analog version outputs a voltage that is proportional to the absolute shaft position. The PWM output version outputs a 1,024Hz signal whose duty cycle is proportional to the absolute shaft position.

The MA2 is a miniature encoder less than 5/8in. in diameter and just over 1in. in length, including the shaft and bushing.

Absolute encoders have traditionally been larger, more expensive, and more complex than incremental encoders. In contrast, the small size, low cost, and simplicity of the MA2 now provides absolute position feedback for a new spectrum of applications that would otherwise be impractical.

For further information, please visit the web site: www.usdigital.com