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2 servos burnt up

Posted by Brian S on March 22, 2013 at 2:52pm

This is the second time... First time burnt 1 Hitec servo, this time 2 Hitec servos

My setup:

Powering the APM 2.5 from two power sources, both 5v (removed JP2 of course)

Heli: Futaba RX with 3 - Hitec HS 5245 MG for the collective, 1 Futaba S9275 (its OK)

Also powered by USB (5v)

I had no problems having all three powering the APM at the same time...NONE...

My conclusion:

I had all three powers plugged in at the time, the only thing in common, that I can come up with in both situation... I did a "erase", "reset" then "reboot" to clear out the previous parameters.  Has anyone else experienced this type of problem??

Any in put will be appreciated.

Thanks, Brian

TREX 500 FB

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Replies

  • Gábor Zoltán May 15, 2014 at 1:47pm

    Hi,

    How can this be configuered in arduplane?

    there is no RC_SPEED parameter.

    Thx,

    Gábor

    • Developer
      Randy > Gábor Zoltán May 15, 2014 at 6:04pm

      I think plane always updates the servos at 50hz.  It may not be possible to adjust it for plane because generally the speed at which you need to update the control surfaces is much less than you need for a quad.

      • Gábor Zoltán > Randy May 16, 2014 at 12:16pm

        Thx Randy!

        I wasn't sure about this.

        It was strange that the first 4 channel is steady as a rock, but the last 4 is jumping randomly sometimes.

        I was thinking if thies channels have higher rate like 100hz or more.

        What is the difference rally?

        Thx again,

        Gábor

  • Krzysztof (Chris) Stankiewicz May 10, 2013 at 8:36am

    Hows it going?

    I've burnt out analogue servoes, and no im on digital metal gears from hitech.. they dont seem to overheat or anything now, but theyre rather slow to respond and are not synchronised... no ideas what to do next..

    Did you get any more info about your problem(s)?

  • Karthik May 3, 2013 at 11:58pm

    Hi folks,

    Now this is elementary, how to change the refresh rates of the servo connected from the mission planner. I already fried two futaba 3305 servos while testing on the bench. I use APM 2.5, 3DR 933MHz radio

  • Rob_Lefebvre March 23, 2013 at 5:03am

    Hmmm... this is the first time I've heard of servos on a heli "burning up".  What happens exactly?

    The whole 50Hz for analog thing is... maybe just old data.  I've driven $2 HK analgo servos at 125hz with no problem.

  • Jolyon Saunders March 22, 2013 at 3:32pm

    What is the refresh rate set in to MP? From memory it should be 125hz for digital servos, or 50hz for analog otherwise you risk frying servos. The only other cause I can think of is the limits weren't set properly leading to binding (leading cause of servo failure) 

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