I am using Arducopter-2 with APM-1
When i went for a test flight, everything seemed ok at startup, but after i powered the motors, the angles/gyro rates/mag started giving erratic readings even when it was stationary on the ground.
Attached is a screen-shot of the problem, showing the raw sensor values moving erratically.
What could be wrong? How can i fix this?
Taking of like this is a bad idea, because it almost flipped over. So it's not a display error.
I had the same problem yesterday, but after i powered on and off a couple of times it went away. Today the problem persists despite powering on and off more than 6 times.
Do you have heavy vibration on the frame?
It's very misleading to look at that graph. It's sampled at 5-10 hz and the noise you're seeing is at hundred of hz. You'll be getting heavily aliased results.
Have you flown much before? many new flyers flip on takeoff because they don't pop out of the ground effects fast enough.
Be sure you can fly by doing a hand test. If that works, disarm, arm again and fly. Get it to two feet off the ground asap. don't linger with the throttle on the ground.
Fly over grass.
After the flipping incident, i disconnected the lipo, reconnected it and looked at the mission planner.
The quad was stationary on the ground, but the display in the HUD was all over the place. Pitch roll and yaw were randomly moving everywhere.Disconnecting and reconnecting the lipo again didn't improve the situation.
So there was no frame vibration at all, because the copter was disarmed and rock solid on the ground. Ground effect could be a possibility, but this erratic behavior on the HUD started appearing even after the props stopped spinning.