Some info on my quad:
frame at 250mm
APM2.6 with remote compass and GPS
3s 1550 mah battery
1805 kv2600 moto
ZTW 10a ESCs
5045
i am a new player of apm.
i want to use AutoTune.
but in my quad. it only works 5times, then autotune fail.
could anybody help to find the problem of my quad. thank you .
Replies
I took a quick look at your first log file and your vibration levels are about 2x higher than recommended.
Try dynamic balancing your motors and static balancing your props and things should get much better.
You can also look at using a softer mounting system for your APM.
Just to note, the sub 400mm quads tend to have high levels of vibration, have you checked the vibration levels to confirm that is not an issue? For the minis I find the major boards do not work so well. I know the OpenPilot project also suffers from the sub 400mm issue and I have seen indications that show APM does to a greater extent. I know there are people working on this issue so as you see the 200/250mm community grow you will probably see a resolution.
Very interesting post as I am experience something similar. I have a 250mm quad too and have noticed some serious oscillation when trying to take off... at the early stages of tuning.. but not looking good thus far. I am wondering at a minimum do i have to half all params as its half the size and power of a 450mm standard quad?
i have try several times to tune the pid。
but it can not do very well。 the p is so low that the copter can not return to stabilize。
do you know why my copter can not use autotune？ as it so small？ or the other reason。