Help reading Logs after crash

Hi,

This is my first post here even though i have been reading for some time.

i recently built my quad with APM 2.5 firmware 2.9.1.

I was very gradually adjusting the Alt hold stabalisation parameters (as it initially kept jumping up 5 meters at a time).

After several successful flights using alt hold, i switched FROM stabalise TO alt hold and the quad immediately flipped and plummeted to the ground. One motor appeared to go full throttle to cause the flip.

I am trying to determine the cause and have downloaded the logs from the apm 2.5 board using the mission planner terminal window. Can someone tell me if LOG 1 is the most recent log (log of the crash), or the last log which was LOG 86 or something.

Can someone help me decipher the logs as i have no idea and there seems to be minimal information on how to read them?

thanks for any help in advance!!

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T3

Richard Boyhan March 12, 2013 at 5:29am

Normally the last number is the last log. You should get into the habit of erasing your logs. The APM does not have unlimited space.

Randy has done an excellent job documenting log analysis. See below.

Logs

There are a few wiki pages where we talk about how to use the dataflash and tlogs here (http://code.google.com/p/arducopter/wiki/AC2_Datalogging), here (http://code.google.com/p/arducopter/wiki/AC2_Record) and here (http://code.google.com/p/arducopter/wiki/AC2_Logs). The last two pages have videos on them where I go through some of the details so that might be useful...
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Help reading Logs after crash

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