Replies to This Discussion

Permalink Reply by Eddie Weeks on November 24, 2011 at 9:41am

 

Yes.. Mine does that also...    Eddie

 

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Permalink Reply by Guido on November 24, 2011 at 10:07am

and what did u do to resolve? 

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Permalink Reply by Eddie Weeks on November 24, 2011 at 12:39pm

 

Still doing it...

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Permalink Reply by Eddie Weeks on November 24, 2011 at 4:08pm

ok.. found something that helps...  I was flying with 4S5000... Then I installed 2 x 4S5000.. much heavier..

They got rid of most of the problem..  It still climbs when the rudder is recentered but not that much..

Hope this helps.. running cheepo 3020-600 motors.. ~300 watt each

Eddie

 

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Permalink Reply by Guido on November 24, 2011 at 4:17pm

thank u so much, now i'll try to change the batteries and let u know.

thanks again

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Permalink Reply by Eddie Weeks on November 24, 2011 at 8:36pm

 

Ok...I think I found the problem... I just changed props and that fixed everything... Flies Far better now.. !!

I am now using a much smaller prop and the RPMs are way up..   I found if the power is too low for hover, nothing works right...

Before mine was hovering very quitely and at very low rpms.... but after changing the PID 20 times... It still did not fly right!!..   More weight helped... then smaller props fixed it..

 

Eddie

 

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Permalink Reply by Guido on November 25, 2011 at 9:41am

i changed the battery but nothing... same problem... 

i made a video http://youtu.be/qeatK4JFG6Y

 

please i don't know what to do... i see in mission planner data that the YAW automatically grow even if the copter is in stop... Seems to be interference problems... but where??

 

 :((

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DeveloperPermalink Reply by jasonshort on November 25, 2011 at 11:34am

you are seeing heading or Yaw hold. The copter wants very badly to hold the original heading when it takes off. It is reset when the yaw stick is adjusted or the copter is on the ground.

 

Two motors will spin up and two will slow down to create the yaw rotation. This is completely normal and how all quads work.

Jason

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DeveloperPermalink Reply by Marco Robustini on December 4, 2011 at 3:03pm

Jason, there's a way to increase the "%" of motors spin up/down value for increase the yaw rotation without climbing or descending? I've octo, with your board the yaw rotation is too slow, just for test if i have a configuration problem i tried Wookong with the same hardware and is too fast in rotation, without loose or increase altitude.
What do you think?  :-/
Listening the sound engine speed Wookong have a fastest motor rotation when i control yaw.
Anyway where is in the code the yaw motor control?

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DeveloperPermalink Reply by jasonshort on November 25, 2011 at 11:35am

Yes there is a low threshold in which some assumptions could screw things up. Do you have a watt meter? That's the best way to understand efficiency. And note that AC motors are not very efficient when run at low RPM.

Jason

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Permalink Reply by Guido on November 26, 2011 at 6:58pm

i haven't a watt meter but i will buy one to test. where i must check watt? on the motors?

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Permalink Reply by Eddie Weeks on December 4, 2011 at 1:49pm

Correction... Mine still does it bad...  Climbs and falls with yaw input..

I could not use the small props because they fluttered at high power..

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