Robust position sensor features self-calibration

7th October 2019
Source: Vishay
Posted By : Mick Elliott
Robust position sensor features self-calibration

A high precision position sensor that offers more robust performance than existing absolute encoders and better resolution and accuracy than traditional Hall effect sensors for industrial robotics and other demanding applications has been released by Vishay Intertechnology.

The RAMK060 rotational absolute magnetic kit encoder uses advanced contactless technology to achieve > 13-bit accuracy, 19-bit resolution, and > 16-bit repeatability while maintaining robustness against external magnetic fields, moisture, airborne pollution, vibration, mechanical shock, and changes in temperature.

It features a useful electrical angle of 360° and works over a temperature range of -40°C to +85°C, with higher maximum temperatures available on request.

The rotor + stator kit design of the device, as well as its off-axis design (for hollow shaft mounting), slim ~6.5mm profile, and light weight (< 55g) make it ideal for applications where little space is available but an angular position needs to be detected with high accuracy.

The RAMK060 has an outside diameter of 60mm and inner diameter of 25mm. Several multi-turn variants are available, including connection to a backup battery when system power is off. SPI, SSI, or Biss-C output signals are available.

Vishay's patented design is particularly suited for applications calling for precise and repetitive motion such as arm joints for industrial robots and collaborative robots; steering wheels for automated guided vehicles; and machine tools used in printing, textile manufacturing, and milling.

Key features of the device are self-calibration to compensate for mechanical misalignment, built in self-monitoring and memorisation of the last absolute position before power-off.

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