Monday, October 10, 2011

FPV routine and parameter fixes

I spent the last days getting some routine in FPV flying. At the beginning I made the mistake to peek at the copter below the goggles to be sure where it flies. But this is not a good idea: You have to let go and dive into the experience and fly like if you are onboard - only doing so you can be sure to control the copter properly.

Tipps for beginners:
1. learn to fly the copter and be familiar with it's reactions
2. find plenty of space
3. perhaps bring someone to keep an eye on the copter while you fly and warn you if you are about to crash into something that is out of the FOV
4. DO NOT PEEK. Just concentrate onto the screen.

I had some problems with a wobble of death. After agressive maneuvers in stable mode the copter control escalates and I crash. 

After a tipp from the rcGroups forum I decreased Level P and the problem seems to be gone.
I have to make further testing to verify this.

Another troublesome device was the magnetometer. By installing it upside down and turned I had to alter the settings in the software. I had a hard time finding the correct values because I thought that turning the coordinate system is right: After a tipp from Alexinparis I found the correct values and now it is working perfect. The copter holds the heading like a charm.

#define MAG_ORIENTATION(X, Y, Z)  {magADC[ROLL]  = -X; magADC[PITCH]  = Y; magADC[YAW]  = -Z;}

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