I need to track the movement of an arm on the Z axis over a 180 degree arc. If I run the stepper motors slowly the MPU-6050 is pretty accurate. If I run the arm at full speed (about 200 rpm) the Z errors make the MPU-6050 unusable. I understand that MPU-9250 has a built in magnetometer that will help with Z axis tracking but will it work at the rate of change required or is there a better choice?
I could always put an encoder on the stepper motor but for cost and other reasons, I would prefer to get a reliable gyroscope on the arm. Thanks.
The example code I am using to experiment doesn't set the sensitivity so it must be on default. I will consult the docs and see what I can find. Thanks again....
The latency on IMUs is possibly an issue here, 200rpm is rather beyond the spin rates of most RC
planes/rotorcraft. What angular error is acceptable? What update rate are you using?
The issue I am having is not latency because the errors never correct themselves. If I slowly move the sensor through 90 degrees and back it returns to zero (or whichever angle it started at) but if I move it quickly the error can be a jump of +- 15 degrees. It doesn't correct itself if left to settle, it just remains wrong. Even if I do a slow movement it just returns to the new zero.
I have ordered an MPU-9250 to try and see if the magnetometer makes a difference at higher rates of change. Perhaps this MPU-6050 is faulty/fake, I have never experimented with them before so I am learning as I go. Cheers.