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Pixhawk flip crash after 3.1.5 install

Posted by david hitchcock on June 25, 2014 at 2:17pm

Hi,

last weekend I installed arducopter 3.1.5 on my Pixhawk. Its a quad running sunnysky 3108 720's afro20aESC's. After I did the FW change, I noticed MOT_TCRV_MAXPCT was like 89, was highlighted in yellow. I set it down to 80, which made the yellow warning goaway. anyway I did a test flight, and twice (2 different test flights) the quad fell from the sky as if a motor stopped. after reviewing the logs, I see a mechanical failure. my question is the mot_tcrv issue related, also, am i missing something in the logs?

Im not very experienced in analyzing logs, and any help is greatly appreciated! also attached is the full log, with the crash at the end.

2014-06-23 08-08-06.log

2014-06-23 08-08-06.log.gpx

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315, analysis, arducopter, crash, esc, failure, issue, log, logs, maxpct

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Replies

Dave June 27, 2014 at 7:51pm

Put the value back it is a error in mission planner that was never fixed. Found this in another thread. Mine shows the same thing.
- david hitchcock > Dave July 1, 2014 at 8:51am
  
  Mp wont accept the old value of 89. I put it in, and it just refreshes back to 80.
- david hitchcock > Dave June 30, 2014 at 3:07pm
  
  Thanks! I will try that this evening. I flew it today, just a test, 3-4 feet up. Needed a lot of throttle just to hover. I'm thinking it's related
- david hitchcock > Dave June 28, 2014 at 7:28am
  
  Thanks Dave. I hope I remembered the original value correctly! I think it was 89. Any idea how to find that out?
  - Mark Slater > david hitchcock June 30, 2014 at 2:02pm
    
    You could do an Erase in CLI which will put all the defaults back so you can look at them, Save your current config first and re-load it after.
david hitchcock June 27, 2014 at 3:56pm

I just noticed my signal wires, wrapped around a ferrite ring, semi cut, due to friction by clean plate on my flip frame. Prob what caused signal loss?!?
david hitchcock June 25, 2014 at 2:27pm

I forgot to add, it was running great before I changed to 3.1.5. Dozens of flights..

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