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Throttle not at zero when armed

Posted by Barrahazard on December 5, 2013 at 5:44am

When I arm my copter the motors spin up straight away. PX4 with Arducopter 3.1-rc7 and 20A hobbyking ESCs.

I have done my ESC calibration and RC calibration, my flight mode is Stabilize. When I do the ESC calibration zero throttle is zero throttle but then I arm and the motors spin up on what was calibrated to be zero throttle.

I have been looking into parameters like THR_MIN and TRIM_THROTTLE to see if they make a difference but to no avail.

Any help would be much appreciated. Cheers! 

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Tags: calibration, px4, throttle
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Replies

  • Barrahazard December 5, 2013 at 7:21am

    I have found a parameter called MOT_SPIN_ARMED and set it to zero.

    I helps but I still have the motors spinning up unless I hold the throttle down (literally). I hooked up an oscilloscope to the output and the signal was jumping around at low throttle levels.

    Any ideas? Is it a bug in the firmware? Cheers

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