Magnetic Shielding for 3-Axis Test Equipment

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Discussion Overview

The discussion revolves around the design of a 3-axis test equipment intended to assess the sensitivity of a magnetic sensor, specifically addressing the interference caused by the magnets in the motors used for movement. Participants explore potential solutions for shielding the motor magnets to prevent distortion of measurements without affecting the magnetic probe.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that keeping ferrous metals away from the test probe is crucial to avoid distorting measurements, recommending the use of non-ferrous materials like plastic or wood for the probe holder and translation mechanism.
  • Another participant mentions the possibility of remote motor placement to minimize interference with the probe.
  • A brief mention of "Mumetal" is made, indicating it may be relevant for magnetic shielding.
  • Links to external resources on magnetic shielding and suppliers of materials like Mumetal are provided, suggesting these may offer useful information or products for the design challenge.

Areas of Agreement / Disagreement

Participants express differing views on the best approach to mitigate interference from motor magnets, with no consensus reached on a definitive solution.

Contextual Notes

There are limitations regarding the specific requirements for shielding, the effectiveness of proposed materials, and the potential impact of motor placement on the overall design, which remain unresolved.

Who May Find This Useful

Individuals involved in designing magnetic sensor testing equipment, engineers focused on magnetic shielding solutions, and those interested in the practical applications of materials like Mumetal.

humanoid
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i am designing a 3-axis test equipment to test the sensitivity of a magnetic sensor. i need to use three axis motorized slides to move the magnetic probe along the three axis. but the magnets present in the motors interfere with the magnetic field of the magnetic probe.
is there anyway i can shield the motor magnets without affecting the magnetic probe?
 
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humanoid said:
i am designing a 3-axis test equipment to test the sensitivity of a magnetic sensor. i need to use three axis motorized slides to move the magnetic probe along the three axis. but the magnets present in the motors interfere with the magnetic field of the magnetic probe.
is there anyway i can shield the motor magnets without affecting the magnetic probe?

I would think that you would want to keep all ferrous metals away from your test probe, or you will be distorting the measurements. Seems like your probe holder and 3-axis translation mechanism should be made of plastic or wood or something, and actuated by motors that are remoted away from the probe by a fair distance.

If you do need the motors to be close for some reason, then look at the information at this website for more information on magnetic shielding:

http://www.magnetic-shield.com/

.
 
Mumetal
 

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