My rig is the following:
DJI F450 frame
DJI E310 propulsion system
4S 5000 mah battery
AUW ~1600g
My quad suddenly jerked when I was about to start my final descent and fell off the sky from a moderate height.
I am attaching a copy of my .bin log. Thanks in advance
Alvaro
Replies
Sorry, Alvaro, but you haven't given nearly enough information about your machine to make an intelligent guess as to what went wrong however, a quick auto-analysis of your log file in Mission Planner indicated the following:
Log File Z:\tmp\tmpCBA.tmp.log
Size (kb) 1172.853515625
No of lines 15020
Duration 0:00:46
Vehicletype ArduCopter
Firmware Version V3.3.3
Firmware Hash acf2e10c
Hardware Type
Free Mem 0
Skipped Lines 0
Test: Autotune = NA -
Test: Brownout = GOOD -
Test: Compass = FAIL - Large change in mag_field (94.85%)
Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERR found: CRASH
Test: GPS = GOOD -
Test: IMU Mismatch = GOOD - (Mismatch: 0.40, WARN: 0.75, FAIL: 1.50)
Test: Motor Balance = WARN - Motor channel averages = [1500, 1461, 1595, 1496]
Average motor output = 1512
Difference between min and max motor averages = 134
Test: Parameters = GOOD -
Test: PM = NA -
Test: Pitch/Roll = NA -
Test: Thrust = NA -
Test: VCC = GOOD -
A graph of your log revealed huge spikes in your compass mag X, Y and Z values immediately before your crash so I would say your compass (and electrical interference) would be a good place to start. See 'Compass Interference' in the below: http://ardupilot.org/copter/docs/common-diagnosing-problems-using-l...
Good luck