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Jittering motor problem - it's not the bullets

Posted by estebanflyer on February 8, 2012 at 6:29pm

Folks:

10 seconds after powering the APM, the right motor starts jittering.

When I test this same motor without APM, it works fine. That cancels out bad bullets, bad ESC or bad motor. I have tried a different ESC on this same output and the jittering is still there.

I have soldered all the pins myself, checked them and re-soldered them. I'm pretty good with soldering.

I have re-uploaded the firmware (quad 2.3), erased EEPROM, re-calibrated the radio, but the jittering doesn't stop.

It's a brand new ardupilot mega 1280 board, not a 2560.

Mission Planner is 1.1.34

motors: jdrones 850kv

ESC: jdrones 20A

Thanks in advance!! :)

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Tags: 1280, apm, bad, jitter, jittering, motor, signal
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Replies

  • estebanflyer February 8, 2012 at 9:22pm

    Thanks for your help Randy!

    I swaped the wires and a different motor jittered. I tried an ESC that doesn't jitter on that output and it jitters. It's the board.

    The APM has a 1280 chip, not a 2560. Is it still compatible with the latest firmware of Quad and Mission Planner?

    How do i fix a board?............

  • Developer
    Randy February 8, 2012 at 8:43pm

    I think you may be able to narrow down whether it's the APM, ESC or Motor by swapping the wires around.  For example disconnect the right motor's esc from the APm, and instead plug in the left motor's esc.  Does the left engine now jitter?  If "yes" then it's the APM.  If "no" then it's the ESC or motor.

    Next try swapping the right motor's ESC with another motor's esc...still jitter?  If Yes then it's the motor, if "no" it's the ESC.

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