Hello, I have Just Biuld a new 500mm size quad after 1 year of reliable use of a 360 quad.
I transferred most gear from the old quad to the new quad but upgraded the motors and firmware on the APM 2.5 for the new frame.
this frame flies much smoother than my old one but now I have a intermitant problem.
after aggressive pitch and roll, sometimes the quad will not come back level. generally pitching about 5-15 degrees forward with no stick input so I need to add some pitch back input to keep the quad level. This only happens maybe 1 every 5 flight (normally the 1st flight of the day but not always) sometime disarming and rearming will fix it, sometimes I have to unplug power and reboot.
Is anyone else experiencing this problem with the new firmware?
Please help if you can.
Replies
log and check for crazy vibrations.
The vibrations are not perfect but alt hold and auto modes work well before the problem happens. Here are log files from a flight I did this morning. It happens just after 50% when I execute a fast forward flight them fast reverse in stab mode. Please someone that knows what there doing have a look.
Regards Daniel
2014-09-29 08-59-22.tlog
2014-09-29 09-00-17.log
the .log says that your description of the problem, and my conclusion, is correct :)
for the future . only the .log is needed, rlog, tlog, does not contain equally useful data.
Just an update on this. i managed to get the vibrations down but the lean problem still happened very shortly into the flight logged below.
2014-10-03 11-17-14.log
your RCIN/RCOUT is not logged, that could help - what line number/where is the log does is happen ?
I see something strange around line 6000.
If it always happens to pitch, and always forward - I'd check that motor/ESC/prop etc - as that would be the place to look. (very vibrations and similar problems would give random direction and severity)
- your vibration levels are ok now.
Thank you Andre K for taking the time to look into this. the vibration was my own fault. I failed to use my prop balancer correctly but sorted that problem. I also recalibrated everything and have not seen the problem since. I did however have the compass set to auto calibrate and the offsets had changed to crazy numbers so I have disabled that. Hopefully its smooth flying from here on in.
-Regards Daniel.
compass autocal - does work fine, but is much more prone to magnetic interference than usual use.
so if it gives bad results when you use autolearn, it means you have electromagnetic interference.
a manual calibration *can* work 100% fine in a machine where autocal fails, but be sure to test well in all directions. (you may say bad autocal fail is a sign of possible problems, but it might be borderline ... )
a good test is to fly in stabilize at some decent speed, then switch to poshold - it it just brakes stops, it's good - it actually flies a little like an U or C , (fail to only brake, but moves to left or right - or in severe cases, toilet bowl) -you should try to improve it.
Here's more logs just in case they are needed.
2014-09-29 08-59-22.rlog
2014-09-29 09-00-17.kmz
2014-09-29 09-00-17.log.gpx