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Re: Gaff tape on carpet
The tutorial on ni.com/frc discusses mounting just a bit.
If the sensor gets too close to the carpet, less than a few millimeters, there is not a good return path for the reflected light. As the sensor is raised above a few inches, I saw a dropoff in the sensitivity.
Especially if you are going to tune things at the regional, I'd use the built-in LEDs to get a sense of how the height affects the signal using your tape and carpet, and if you can design it, allow for easy changes to mounting height. I used extra pieces of frame to raise and lower by about 1.5" increments.
Greg McKaskle
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