I came across the SCA3300 [HWT31 Low-Noise Accelerometer Module】3-Axis Acceleration+Gyroscope+Dual-Axis Tilt Angle Sensor with [ High-Revolution SCA3300 Temp-Compensation Chip], It says it is accurate to 0.0035° but I am not sure that is the accuracy of what I am thinking. These multifunction chips talk in g's and with a equation get back to a angle. Cost is $63 on Amazon.
Here is another one: MPU9250
[Bluetooth 5.0 Accelerometer+Inclinometer] WT901BLECL MPU9250 High-Precision 9-axis Gyroscope+Angle(XY 0.05° Accuracy)+Magnetometer with Kalman Filter, Low-Power 3-axis AHRS IMU Sensor for Arduino. It is only $48 on Amazon. If what it says, 0.05° accuracy, is correct, then that one would work also.
What I am looking to do is put this on a table saw to measure the tilt of the blade and the height of the blade. I would mount the dual axis sensor on the arm that moves and can capture both angular movements. I would need to do a little math to compensate slightly for the geometry error on the height but it is minor, around .005" at most. The sensors would need to be calibrated to establish 90° vertical (perpendicular to table top) and 0.000" blade height but that is easy to do. My thought was that this sensor could just simply be epoxied in place. There is no place to easily mount a mechanical encoder setup. i know that would give the best accuracy of all but the effort is not worth it, if even possible physically.
I am curious on what everyone thinks on the 2 sensors I mentioned above.
Thanks!