APM 2.6 3.1-RC2 Octocopter Alt-Hold motor "pulsing"

I'm having problems with APM 2.6 running 3.1-RC2 on Octocopter. Stabilize works well, but Alt-Hold and any other "automatic mode" like Loiter or RTL is problematic. I've tried default PIDs and played around with them but no luck. The main problem is rather strange motor behavior. 

A picture from datalog is attached, note the throttle on Alt-Hold. I'll also include a photo showing Accel X, Y and Z vibrations, which should be OK.

What could be the problem? Has anyone gotten Alt-Hold to work well on 3.1rc2 Octocopter and is willing to share the values?

altholdthr.png

Accel.png

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

This reply was deleted.

Activity

Liam left a comment on Agricultural UAVs
"Hi
I'm Liam from T-MOTOR. I would like to reach out to see if there is any possibility for us to work together.
We are a propulsion system manufacturer who offers motors, propellers and ESCs for all kinds of drone applications which vary from secur…"
Jun 30
Richard Cox left a comment on Australia
"Anyone in the DIYDRONES Australian subgroup based in Alice Springs, NT?
I am experimenting with Ardupilot (standard Arduplane), Pixhawk 4 FC in a 4-ch
RC "AXN Floater Jet" foamy plane..."
Jun 29
Omar Sykes left a comment on Australia
"Hi everyone, I am looking for someone who is good at drone building, repair and software in Adelaide. Please give me a call on 0477 319 219."
Jun 29
More…