Yesterday, i added a new senor onto my quad, MaxSonar MB1260 XL for better altitude hold. Before attaching and re-uploading the ArduCopter 2.7.3 onto the APM 2. I erased and reset the board. And then attached sonar as described in the wiki manual. And uploaded the code and followed all initial steps (Of course i enabled the sonar). Everything went smooth.
Next step, time for test fly. It flew great in Stable mode. However, as soon as i toggled the ALT_Hold switch ON. Quad started acting strange. It kept climbing higher n higher and suddenly dropped out of nowhere. Luckily i managed to control by toggling the switch back to stable mode.
I have checked everything couple of times now. All connection looks good. Mission Planner looks ok. I don't know what the problem. Your help would be so much helpful. I have attached couple of videos below. Please take a look at them. If you need any other information let me know. Thank you.
- DJI F450 Frame
- HackerStyle 20-22L Motors
- Turnigy TY-P1 25Amps ESC (Flashed with SimonK firmware)
- ArduCopter 2.7.3
- MB1260 XL - Sonar
- 4000mah 20C 3Cell Battery
- DX7 with AR7000
- Using one of four ESCs to provide power to the APM 2.