Well after a great weekend out flying got some cool videos with a bit of fpv flying. i then installed a camera gimble and ran it to the apm. yes i know i did this wrong but was just to keen to get it into the sky. i had it stabilized though the apm. i then had several flights no problems. gimbles not to good u can see every step in the servo. well i was backing back down to land and it dropped backwards out of the sky. lucky for me it landed in my back yard. after looking at logs it looks like a motor quit on me. i can see the voltage being to low here?. so i replaced the back left motor with a new one. no camera or mounts, and i installed a power module. i was just test flying in the back yard all was ok. i had it in alt hold. it touched the ground and went nuts. flipped over and kept trying to run even though my stick at bottom and back in stabilize. logs show it can anyone shed some light on why this is happening
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I haven't looked through the logs in detail but I wanted to clarify the part about "flipped over and kept trying to run even though my stick at bottom and back in stabilize". So from the logs you can the pilot's throttle in (red) and the throttle out (green) and the little white labels show the mode. So the pilot's throttle goes to zero first .. the throttle out (green) continues at a low level (130 = 13%) for a moment longer until the mode is switched to Stabilize and then the throttle out also goes to zero.
....so it appears the instructions to the motors went to zero as soon as it was switched to stabilize..for the period that it was in alt-hold it reduced them to the minimum (alt hold will never turn off the motors completely).