Version 2.5 of the ArduCopter code is now available in the AP Mission Planner and in the downloads area!
The default PIDs are optimized for a 3DR/Jdrones quad with 850 motors and 10" props. If you're using more powerful motors/props, start by turning down Rate Roll P in 25% steps.
While some testers have reported very good flights with the default PIDs, some have reported that this release is a little "sharper" due to the DCM improvements and have found they needed to:
reduce stabilize P by 10% (i.e. 4.5 -> 4.2)
reduce stabilize D by 30% (i.e. 0.15 -> 0.10)
increase rate D from 0 to 0.001
Tuning loiter can be tricky. Refer to the discussions which will appear below for more community feedback on what parameters work best.
Please post your feedback in this discussion. For enhancement requests and bug report, please add them to the arducopter issues list. When possible please include logs (tlog and/or dataflash) and tell us whether you're using APM1 or APM2 and what version of the software you're using (presumably 2.5 but tell us anyway!).
Thanks for this release go to the developers (both in the core team but also those who have provided bug fixes through the issues list) and also the community members who participated in the previous release thread and provided some great detailed information in the form of issue reports and logs which allowed us to nail some bugs!
...it is not a radio issue,radio calibration is ok no adding throttle...
Just 2 small vids on test I've conduct on april 17th.
All params are standards exept for the first quad where stab_xxx_P is reduced to 4.2.
Second quad with gopro inside.
Good flight all.
On your second Video i can see some wobbling, that my APM1 atm does too.
Those wobbles just look like a bit of tuning is required. Try reducing rate_P first. Then try adding in a bit of rate_I. Then try reducing stab_P.
Also you may try using rate_D instead of stab_D, depending on your frame it can make a big difference. You'll need small increments for rate_D, 0.002 at a time if you want to try this route.
There is some wobbling, I've flown default parameters that I should adapt a litlle bit.
For the fisrt quad I should reduce a litlle bit more StabP, and for the second I think stab_D will halp to remove woobles in descent.
Nice vids Olivier ,were you at St Galmier ?
Hi Jean Louis,
I'm close to saint chamond. But I'm flying a lot in Feurs or Roanne for F3A training.
We should organise a multirotor meeting ;-)
Olivier we met several times at Denis's shop.
Ok for the multi rotor meeting just wait fro a better weather. I will bring an Hexa from Multikopter.de an other hexa with the Naza module then the quadri with the APM2 (still under tuning since over 3 weeks !!!).
we are 3 from lyon to make multirotor Multiwii and now DJI frame + APM2
This was my crash. i think the wobbling go-pro on the top of the quad made for a wobbly video and flight.. and crash .. apart from a few broken props nothing else got damaged. http://www.youtube.com/my_videos_edit?ns=1&video_id=mLwNCKKjcMs
Nice view of Kuala Lumpur. The twin towers are way off in the back ground, but hard to see. The apartment next to this site is where I live. On this clip of the hex it landed on a ditch at the end which I didn't see and why it flipped. http://www.youtube.com/watch?v=7Xm5DmQHk4Y