MR-Sensors

Where do you use MR-sensors?

MR-sensors, evaluation electronics and magnetic scales from Sensitec are in use everywhere, where movement is being controlled and steered, where paths, angles, positions, electric or magnetic fields are measured and detected.

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What is the MR effect?

The MagnetoResistive Effect, "MR-Effect", has been known for 150 years. However, its use in sensor applications was first made practically possible through the development of thin-film technology some 30 years ago.

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You will find us

… at the following exhibitions and fairs.

Our exhibition team is looking forward to presenting you our new products and innovations and to giving you technical advice for your individual measuring application.

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Machine Tools

Machine tools can provide difficult operating conditions for measurement systems. By providing a unique combination of high resolution, robustness and highly dynamic response, while enabling easy assembly and offering compact dimensions, MR sensors are ideally suited to linear and rotational measurement tasks in this field.

Typical Applications

  • Speed measurement system for high-speed spindle
  • Integrated encoder for linear bearing

APPLICATION EXAMPLE: Speed measurement for a high-speed spindle

Requirements

An incremental sine-signal encoder shall measure the speed of a high speed spindle for tool and die machining. An index signal shall be generated per revolution. The output signal shall be RS422 compatible.

Key Specifications

Resolution:
256 sine periods per revolution
Output signal:
1 Vss with inverted signals
Accuracy:
<0.1°
Temperature range:
-40 °C up to +125 °C
Rotational speed:
> 25.000 rpm

Solution from Sensitec

Scanning of a pole ring with a length sensor of the AL600 family and a custom-made reference sensor for the index signal.

Why use MR sensor technology?

  • Simple assembly and adjustment
  • No mechanical wear in the measurement system
  • High repeatability
  • Resistant against humidity, dust and oil
  • Highly integrated module with integrated signal conditioning electronics