APM Hangs, can't disarm motors and motors spinning without response to TX

Hello, I've been having some problems with the APM hanging and sometimes with the motors spinning (wich is a pain in the ass when it comes to shut down everything). The board stops responding to RC controls, I can't disarm motors, no responses whatsoever. Today this happened to me 3 times. I configured everything via USB, all worked well with the copter without propellers, motors throttle well, disarm, and all possible tests ok. As soon as I attached the propellers (10x4.5), I armed, throttle to about 10% and... HANGED, reconfigured, retested without props, attached props and... the same.

I then attached a LiPo alarm to the battery to see if it was OK, I noticed that the the alarm bips and 1 led becomes red (indicating one cell bellow 3.3V), and at the same time the board hanged. I don't know if this has happened to anyone else, but even using a 5000mAh 30C, the ESC's seem to get a lot of current from the batt or the batt is not of good quality (using 880kv rc-timer and 30A hobbywing pentium ESC). The curious thing is that this only happens when the motors have the props maybe because they get more stressed out, however with 12x4.5 props this didn't happened to me before, and the 12x4.5 should stress out the motors more. I ask a member of the team what batteries you recommend for tri, quad, six and octo.

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3D RoboticsPermalink Reply by Chris Anderson on July 31, 2011 at 4:31pm
That means your board is browning out and hitting the low-voltage cut-off. Sounds like the ESC you've got powering the electronics is failing or has a BEC that isn't up to the job. Try switching it with another one.
Permalink Reply by Rui Manuel Cravo Marques on July 31, 2011 at 5:36pm

I've got all the ESC's powering up the board, they're all connected to the outputs. I'm not using a PDB. I've got all the ESC's connected in parallel, and all BEC cables are connected to respective outputs.


3D RoboticsPermalink Reply by Chris Anderson on July 31, 2011 at 5:41pm
Yikes! That's not the way to do it--all those BECs are fighting each other and you'll get current eddies. Only one BEC should be powering the electronics. All the others should have the red wire cut. If you use the official PDB, all this is taken care of for you.
Permalink Reply by Rui Manuel Cravo Marques on July 31, 2011 at 5:46pm

Ohhhh, I did not knew that, I was thinking this way was safer since I was having redundant power to the board :( silly me, instead of cutting wires, I'll just flip the connector 180º from 3 of them and plug only the signal connector, how about that ?


DistributorPermalink Reply by Dany Thivierge on July 31, 2011 at 6:37pm

I wonder Chris which one is the one powering the electronics? (standard rev D PDB)

 


3D RoboticsPermalink Reply by Chris Anderson on July 31, 2011 at 7:10pm

It's the front motor ESC (on a + frame)

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