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ArduCopter rotates around itself

Posted by Mark Zimmerman on April 3, 2012 at 8:57am

Hi

I have 2 3800mah battery, 3S with 30C power.

Motors are 450w and 930KV

Propeller 12x4.5

Everything is set properly.

ESC calibrated using auto mode (calibrated all ESCs at one time)

Motors are same

ArduPilotMega 1.4 with 2560 processor

IMU Shield attached also.

Motors calibrated

ESCs calibrated

Body (frame) of quad is fixed and checked multiple times, gyro shows good.

Anytime I start engines using my RC (Futaba 6EX), it starts spinning/rotating around itself and sometimes it takes off over two legs and rotates over two legs.

Seems like two motors spins faster than 2 other motors, sometimes 3 motors faster than other 1.

I tried Takeoff mode, auto mode, stabilize mode and guided mode. None made change!

CW and CCW propeller and motor spin side checked multiple times. No worries.

When I push throttle just two legs goes up and arducopter rotates.

I had 4-5 takeoffs but suddenly it crashed to something, because it was always going to one side, like I push it to move left, it was always going to left after takeoff.

What do you suggest? What I'm doing wrong? Any suggestion? Please help me.

Thanks

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Replies

  • Mark Zimmerman April 3, 2012 at 9:10am

    P.S.

    I don't have GPS (no need for now)

    I checked manual and all possible solutions for myself, just I didn't understood this one:

    "

    1. Was the quad stable and flat for the whole calibration routine at startup? Was it stable and flat during the setup process? (If need be, do it again)"

    Does it mean ESC calibration? If so I did it correct.

    Also I don't know level calibration of frame. If you think it's the problem, please advice how I can do it, I can't find manual for it.

    Also I don't know PID changes required for my frame, it's not 3DR original arducopter frame, how can I find correct settings for my frame?

    Thanks

This reply was deleted.

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