Replies to This Discussion

AdminPermalink Reply by John C. on May 10, 2011 at 10:12am

hard to say, can you pull the logs?

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Permalink Reply by MB1380 on May 10, 2011 at 1:11pm

Check the gold bullet connectors on the motors if you have them, they can fail!

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ModeratorPermalink Reply by John Church on May 10, 2011 at 5:22pm

I second the connectors idea (get rid of them), or make sure your battery is up to the task.

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Permalink Reply by ARHEXA on May 10, 2011 at 10:03pm

+1

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AdminPermalink Reply by John C. on May 10, 2011 at 10:31pm

You absolutely have to get rid of the connectors, but when they failed on me, that motor would drop out, and it would crash.

 

I also had some kind of APM lockup that sent one motor full throttle in mid air.  Definitely a different flip and crash style to it than the bad connector.

 

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Permalink Reply by LAIC on May 11, 2011 at 6:36am

i tested with the arducopter in my hands : moved the chassis while the 4 motors were spinning slow :

suddenly on motor " rebboted " doing it's beeps ( initializing ).

 

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Permalink Reply by Christopher Cooper on May 11, 2011 at 6:39am

Sounds like a problem with the ESC. Make sure it's calibrated correctly and securely connected to the APM board.

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Permalink Reply by LAIC on May 11, 2011 at 6:37am

what do you mean with" bulled connectors " ?

 

regards

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Permalink Reply by Christopher Cooper on May 11, 2011 at 6:42am

Bullet connectors are the plugs that connect to motors to the ESCs.

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Permalink Reply by Christopher Cooper on May 10, 2011 at 4:37pm

Are you using a standard frame? I'm using a frame I built myself and I found the default PID values were only good for small disturbances. Anything greater would case the quad to over correct and flip over. You may want to think about putting it in a rig an re-tuning your PIDs.

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Permalink Reply by Nigel on May 11, 2011 at 9:18am

Like the other guys, I don't like those bullet connectors - I don't know what the designers of those connectors were thinking when the came up with the idea.  When I was flying 3D helis indoors I used to solder the moving part of the connector so that a good connection was made.

 

Anyway, my suggestion is to also check the rotor blades are tight.  On my very first flight with my quad one of the arms dipped as I was about 6 inches off the ground.  A check revealed why - a loose prop.  I'm glad it happened so close to the ground.

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Permalink Reply by Jahn Otto Andersen on May 15, 2011 at 2:31pm

I've had the same problem. I'll solder all the connectors now.

 

How do you guys know that the connectors were failing (apart from the fact that they look dodgy)?

 

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