Motor Run Up Test

Posted by Bud Zirkle on January 14, 2013 at 1:00pm

All,

I'm doing some testing on a new quad and noticed something I don't quite understand.  The log graph below shows throttle input and corresponding ESC outputs.  Quad is on a level surface, no props.  With steady throttle input, motors 1 and 2 (RF and LR) gradually increase speed and motors 3 and 4 (LF and RR) gradually decrease speed.

What's going on here?

Motor Run Up Test.jpg

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Replies

  • Arthur Guy January 14, 2013 at 3:54pm

    I would be interested o find out if you resolve this issue as I am experiencing the same problem.

    I have just tested it now and I am seeing the same issue with motors 1 & 2 drifting from motors 3 & 4.

    As far as I am away everything is calibrated and setup correctly.

  • marc.kulhavy January 14, 2013 at 1:06pm
    You need to run through compass setup and calibration. The copter wants to yaw as the declination and the offsets are not correct.
This reply was deleted.