Yaw + throttle = crash

Posted by maroFX on July 8, 2013 at 1:40am

My Arducopter has a problem with motors, when using yaw.  While hovering everything seems to be allright, but when I use a little rudder stick something wrong happens with motors: all incerase speed gradually, and when I try to reduce speed (throttle stick a little down) all motors shut down!  After short time they start again and Arducopter rises suddenly with tendence to jump up and It seems I lose control over all functions

I updated software to the newest one and I did calibration correctly. It's not my first flight with AC and I did't have any of this problems. I use Futaba setup(R6014FS) and APM V1? (the old board). Could it be a problem with PPM encoder  or something with PIDs ?

Did anyone notice the same problem?

Thanks for help!

Marek

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –
Follow

Replies

  • Shyam Balasubramanian July 8, 2013 at 5:36am

    Problems and its possible solution (I think):

    0. Erase all settings via command line and restore to factory settings (APM-> USB)

    1. Make sure all the connections to the APM are correct and it doesn't reset automatically. Use the Power module that comes with APM to power the board.

    2. Load the Arducopter latest firmware (2.91b) and do all the 'Hardware tab' in mission planner, settings correctly. Make sure the RC control is 'properly' calibrated.

    3. Calibrate the ESC's one at a time (make only one connection at a time). Maybe that can be a problem.

    4. Check the center of gravity, weight distribution.

    5. Save the settings (via Advance Parameter list as a backup). Go to 'Arducopter PIDs' and make ALL the PIDs to ZERO except throttle PIDs, see it is goes up after that (even imbalanced).

    6. Use a CRT to check the PWM of individual motors by running the 'examples' under 'Library' (something like motorTest.pde). For this, use Arduino IDE to upload a test. Those are some simple working programs to test your motors. Uploading this program will overwrite the Arducopter firmware you wrote before via Mission PLanner. But, you can restore it again via the Mission Planner 'hardware tab' (Install Firmware).

    7. Check the voltage at the input and output of APM (S, +, -), I mean the plus and minus pins (should be almost 5V).

    Let me know if you could trace the problem. Sometimes, I know it can get frustrating. The best thing is to check one at a time.

    All the best!

    Regards,

    Shyam

This reply was deleted.