Crashes when lowering throttle, sometimes randomly

Hello,

first of all: I really appreciate what you're doing here. Great project!

 

I have a slight problem with my quad. Current firmware is 2.0.48 beta. After a long time of tuning the PID params I got it flying at least okay. The thing is that whenever I lower throttle a little faster than a snail moves and sometimes at random, too, the copter gets completely uncontrollable and crashes. I have had this problem over several firmware versions and one generation of ESCs and I have to admit, that I am completely clueless.

Attached, I got a log of one of the crashes; it happens near the end. Do you guys have any idea what could be wrong? I'm not at home currently but I could post my configuration and probably a video if that helps.

 

Every bit of help is most welcome!

Regards,

Nicolas

Tags: arducopter, crash, throttle

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Permalink Reply by druckgott on October 16, 2011 at 10:04am

If it´s always at the end the problem is your lipo, if the battery its going down (power which lipo could supply) then the copter do not heave enogh recources to power it up.

You have to stop earlyer and fly the lipo not up to the least "free" ampers ;-)

Permalink Reply by Anis Nielsen on October 16, 2011 at 4:15pm

i fly using my rim timer, its usefull not to harm your lipos, and maximize pilots confidence in flight  ;)

Permalink Reply by Nicolas Brieger on October 17, 2011 at 3:35am

Hey,

 

thanks for the replies. The problem is, that I am near sure this isn't related to battery level as I think I remember some of these crashes being at the beginning of my flights. I am going to try out anyways.

 

Regards,

Nicolas

 

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