Hi all! After some pid tuning, but require further adjustment, today i made the first real flight with my "heavy ArduXOcto", i open this thread for sharing my experience if someone else wants build a similar "heavy configuration" using ArduPiloltMega 2560, IMU, GPS and Baro, etc.
I have previously tested more expensive systems like Mikrokopter and Wookong, and unfortunately i think there is still much hard work over the code for make this electronic flight like the competition, but considering the price i would say that goes too well.
I'm still quite satisfied, even though my copter in some aggressive maneuvers tend to wobble a lot, and in the Loiter mode some circles is inevitable because I believe that the management of the accelerometers correction is not optimized or inactive.
Over the baro range i've a good altitude precision, max 20/30 cm of excursion.
This is my hardware configuration:
- APM 2560
- OilPAN IMU
- Mediatek MT3329 GPS V1.6
- XL-MaxSonar MB1200 (with active filter and "thermal mods", 4 x 10 ohm resistor around the case)
- ESC HiModel Pro 30A, in high timing mode
- Two switching BEC 6V 5A (connected to electronics through two diodes 3A, the tension output is 5.33V)
- Motor TigerMotors MT2814 710 kv (mounted with 3° inclination for increase YAV control)
- Props APC 13x6.5 "E" (X8)
- Two-Way telemetry "Mikrokopter Wi232" (890 MHz)
- Six led strip connected to APM (pins AN8<->AN13 through ULN2003), thanks to u4eake for the code
- Homebuilt frame, mixed aluminum / vetronite (by AleBS, thanks dude! :P) + homebuilt hood
- Lipo 4s2p 5000 mhA 40c
- TX Futaba T12FG
- RX Futaba R6008HS
I'm uploading the video on my youtube channel, post them soon, for now I leave you some pictures.
I enclose the parameters used for the flight test in a soft wind, but there's one error, the real "Rate Pitch I" is set to "0".
I also found out in Win 7 you must set the Arduino execution file to run as administrator. Otherwise sometimes it wont upload the code and will give an error.
Hi there, have you done any waypoint navigation with this copter? If so, would you be willing to share the Nav PIDs? I am tuning an Octo that weighs around 3kg, and its navigation is not going as well as I'd like. The desired speed is 5 m/s, but between waypoints the ground speed usually ramps up to over 10 m/s, especially after pulling out of a loiter. So I guess I'm just trying to see if my Nav PIDs are even in the right ballpark? Thank you!
glad i found this thread. having one heck of a time getting a heavy quad dialed. how much time do you think youspent getting it tuned? i spent most of the day tuning and still dont feel confident hovering. lots of wobbles. very poor yaw control.
nice sharing buddy. following eagerly