Silicone Vibration Isolating Pad for Adafruit BNO085 IMU Breakout
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A design for a vibration isolating pad for the Adafruit BNO085 IMU breakout intended to be made from 30A silicone.
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A design for a vibration isolating pad for the Adafruit BNO085 IMU breakout intended to be made from 30A silicone. I've provided a model of the pad itself in case you want to manufacture it using some other method or modify it, but I've also added a negative model that works as the mould. You can print the mould in PLA using standard settings then pour two-part 30A silicone in and remove it once cured.
The way it works is you mount the pad to the base of your robot or whatever the IMU is measuring with M2 screws and nuts (just finger tight, torque doesn't matter much, and then you take the four protrusions and pull them through the IMU's screw holes with tweezers sort of like the rubber vibration isolating shafts on PC fans. So the IMU is never rigidly fixed. As long as your base is sufficiently rigid, the mechanism will work as a mass damper to reduce the noise the IMU picks up. I tested it and found the IMU to work significantly better with the pad rather than without for my use case. I had prototyped with a TPU pad earlier, but I found it was not as good at damping.
This model was created using Autodesk Inventor.