Position sensor targets precison robotics applications

October 14, 2019 //By Rich Pell
Position sensor targets precison robotics applications
Vishay Intertechnology (Malvern, PA) has introduced a new high-precision rotational absolute magnetic kit encoder for robotics and other precision industrial and military applications.

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

The RAMK060 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 RAMK060, as well as its off-axis design (for hollow shaft mounting), slim ~6.5-mm profile, and light weight (< 55 g) make it ideal for applications where little space is available but an angular position needs to be detected with high accuracy, the company says.

The device has an outside diameter of 60 mm and an inner diameter of 25 mm. 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.

The design, says the company, 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. The key advantages of the RAMK060 are offered as the following:

  • self-calibration to compensate for mechanical misalignment
  • built in self-monitoring
  • memorization of the last absolute position before power-off

Samples and production quantities of the RAMK060 are available now, with a lead time of 16 weeks for larger orders.

Vishay Intertechnology


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