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!
Thanks, I'll try this.
Did the erase, reset, reload the code (2.5.4) into the APM1, re calibrate compass, radio etc. Still spins....I'll try again tomorrow.
Are you absolutely sure your props are all correct (right side up, pushers and pullers in the correct order)?
Checked motors rotation again and found one was turning the wrong way, problem fixed. The lesson here is that even if you check things twice, check again..... Thanks for the help.
Also are you absolutely sure props,arms and motors are not tilted in any way...sounds exactly like that is the case.....
where can I find information how to tune PIDs with channel 6?
In Mission Planner click on the "Configuration" tab, then on the "Arducopter" tab. In the lower right hand corner of the form you can set which parameter you want to assign to CH6 for tuning. There are detailed instructions in the Wiki, http://code.google.com/p/arducopter/wiki/AC2_Tweaks "In-flight tuning" section.
I have tried the in-flight tuning for stab_roll center value 4,000 Mini 3,800 Max 4,200
selecting either a switch or a potentiometer does not work even reducing as described to 25%.
Verified as described in the wiki in parameters page... the adjusted value will jump from 0 to the Max 4.200
I have an APM2 purple board ,I tried with two different radios Hitec Aurora9 and Spektrum DX8.
Any idea on what I am doing wrong.
Hi Jean Louis
I had the same problem when first trying in-flight tuning, and then realised I had never calibrated channel 6 in mission planner.
Hope this solves your problem
I will do Radio calibration on all channels , hoppe this is what you are referring to.
It works well after calibrating the radio with channel 6.
By the way do you know what are the new " I " parameters in the new Mission planner in the configuration page PID values :
Loiter - Nav wp - Throttle_rate there are two " I " parameters for each of them.
Sorry no, haven't had time to look at tuning for a few weeks now, and still learning! Hopefully will get some flying done this weekend.