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#5 Motor Binds on Start

Discussion in 'Electronics' started by David burdeny, Feb 4, 2014.

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  1. Steve Maller

    Steve Maller UAV Grief Counselor

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    Holger just responded:
    http://forum.mikrokopter.de/topic-post505200.html#post505200

    You did increase the start-PWM?​
    And please set the timing to 28°​
    Did you switch on the "Store to EEPROM" field in the settings dialog? Otherwise the setting is lost after the next power on.​
    Please check that and report to me if it was sucessful.​

    ​
    I'm going to try it today.
     
    #41 Steve Maller, Feb 12, 2014
  2. Dave King

    Dave King Well-Known Member

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    #42 Dave King, Feb 12, 2014
  3. Steve Maller

    Steve Maller UAV Grief Counselor

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    It definitely fixes the problem. It's a little disconcerting that the motors start with a slightly more emphatic roar, but certainly not enough to affect anything. It just sounds different, and I'm so dialed in to the sounds my copters make... :eek:
     
    #43 Steve Maller, Feb 12, 2014
  4. Dave King

    Dave King Well-Known Member

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    Steve its probably the extra timing that's making it spin faster at minimum gas.
     
    #44 Dave King, Feb 12, 2014
  5. David burdeny

    David burdeny New Member

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    #45 David burdeny, Feb 12, 2014
  6. Dave King

    Dave King Well-Known Member

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    What did you guys increase the start PWM to?
     
    #46 Dave King, Feb 13, 2014
  7. Steve Maller

    Steve Maller UAV Grief Counselor

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    I followed Holger’s instructions. StartPWM is 4.
     
    #47 Steve Maller, Feb 13, 2014
  8. Dave King

    Dave King Well-Known Member

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    Mine #5 binded today when I made my test pass. Looks like I need to do the mod too.
     
    #48 Dave King, Feb 22, 2014
  9. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Interesting that it should suddenly do that, Dave. Or was it telegraphing that it might be about to stall by doing what I call a "confused start" (when the prop hesitates while the motor thinks, "Hmmm, now which way am I supposed to spin?")

    Andy.
     
    #49 Andy Johnson-Laird, Feb 23, 2014
  10. Dave King

    Dave King Well-Known Member

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    Hi Andy

    Saturday was literally only my 7th flight on the electronics and I saw it twitch on the 3rd and 4th flights slightly. Yesterday it was more pronounced.
     
    #50 Dave King, Feb 23, 2014
  11. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Hi Dave:
    Sounds like it's right on the thin edge of working, doesn't it. As you say, make the recommended changes to the BL-Ctrl and see if that fixes the commutation problem (to give it its proper name).

    Andy.
     
    #51 Andy Johnson-Laird, Feb 23, 2014
  12. Dave King

    Dave King Well-Known Member

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    Did the fix and its not perfect as it has a very small hiccup but it's much better.
     
    #52 Dave King, Feb 26, 2014
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  13. Dave King

    Dave King Well-Known Member

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    Did you guys change only the settings for the BL's that this problem was occuring or did you change them all?
     
    #53 Dave King, Mar 12, 2014
  14. Steve Maller

    Steve Maller UAV Grief Counselor

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    Holger said to change them all
     
    #54 Steve Maller, Mar 12, 2014
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