Hi all..

After several successfully flights with 3s lipo and standard PID settings i decided to change out my 3s with 4s 5000mAh batteries.

But something stranges happen during waypoint flight in AUTO mode.

It was set to climb 150meters in a 1km flight path. Everything started just fine, spot on and i was really happy with the result due to the wind and gust.

When the Hexa was almost at 150mtr height, it suddenly smacks the throttle to the max 100% and the copter goes to the sky like a rokcet.

i grab my RC and switch the mode from AUTO to Stab and was able to get it down without any crash.

My Gopro camera was also onboard. ;)

After i tried one more time, Set point of 100mtr .

When the copter reach 60mtr, same thing happend, it suddenly gives 100% throttle and goes like a rocket up in the sky,

3691004967?profile=original

Im not able to find the root couse to this problem.   Please help.. 

The log also showing 11sat count at all times.

Can this be becouse of 4s lipo???  or is this just a coincidence?

When using 4s, i ha to change my Rate P from 0.150   to    0.110.

Regards

Ludvig

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

Join diydrones

Email me when people reply –

Replies

  • hi mate!!!!

    Yes something similar happened to me. on my case it was flying nice in stabilize... also nice in alt hold.. but the moment i press loiter and started to work with satelites... the quad just started climbing like crazy. it was not a problem of satelites number or even hdop. check vibrations on z axis. in the new update you have the EKF on the main menu of the flying data. to measure the vibrations. however dont do it in the ground. it happens flying so you have to measure it flying. 

    regards!!

  • Hi Guys 

     

    I agree, the problems seems to be related to vibrations.

    After i installed foam under APM board and adjusted the INS_MPU6K_FILTER to be 20, i never had this problem again.

     

    I think i will invest in new and better motors and carbon prop.

     

    @Bill

    Im using 3g GPRS for telemetry.

    https://www.youtube.com/watch?v=pV4_WlfTPq0

     

     

  • Is there an error path back to the GCS using Mavlink? 

    I'm trying to think of ways that the Aircraft could communicate a problem to the Ground Station.

    Logging seems to be so port-mortem.

  • Developer

    Can you post here all the logs of this unwanted event?
    I think is not related to the number of lipo cell.

  • But quite a few of the many strange runaways is happening after many successful flights and with no changes.

    Add fresh battery, start mission as usual, and it takes off, or crashes.

    This is happening more frequently now with 2.9.1 but as yet no pattern has emerged to indicate any commonality, other than running 2.9.1

  • Seems like there have been many instance of a runaway climb in Auto and Loiter modes that I have read on the forums (or seen personally). Is it possible that this is being caused by not setting the new tuning values as per Randy in the V2.9 / V2.9.1 release notes?

  • T3
    The battery should make no difference. Your copter will fly a bit more aggressive with 4S and you should tune down you P value. With my quad I switch between 3S and 4S with a little change in P value. You might want to reset and reload and recalibrate again and manually enter your parameter values. There is a chance of carrying bad parameter values from old parameter saved files.
This reply was deleted.

Activity

DIY Robocars via Twitter
RT @a1k0n: @SmallpixelCar @diyrobocars It's just something that's easy to track with chroma keying. I ended up using different colors on th…
Monday
DIY Robocars via Twitter
Monday
DIY Robocars via Twitter
RT @TinkerGen_: "The Tinkergen MARK ($199) is my new favorite starter robocar. It’s got everything — computer vision, deep learning, sensor…
Nov 23
DIY Robocars via Twitter
Nov 23
DIY Robocars via Twitter
RT @roboton_io: Join our FREE Sumo Competition 🤖🏆 👉 https://roboton.io/ranking/vsc2020 #sumo #robot #edtech #competition #games4ed https://t.co/WOx…
Nov 16
DIY Drones via Twitter
First impressions of Tinkergen MARK robocar https://ift.tt/36IeZHc
Nov 16
DIY Robocars via Twitter
Our review of the @TinkerGen_ MARK robocar, which is the best on the market right now https://diyrobocars.com/2020/11/15/first-impressions-of-tinkergen-mark-robocar/ https://t.co/ENIlU5SfZ2
Nov 15
DIY Robocars via Twitter
RT @Ingmar_Stapel: I have now explained the OpenBot project in great detail on my blog with 12 articles step by step. I hope you enjoy read…
Nov 15
DIY Robocars via Twitter
RT @DAVGtech: This is a must attend. Click the link, follow link to read the story, sign up. #chaos2020 #digitalconnection #digitalworld ht…
Nov 15
DIY Robocars via Twitter
RT @a1k0n: Got a new chassis for outdoor races (hobbyking Quantum Vandal) but I totally didn't expect that it might cause problems for my g…
Nov 11
DIY Drones via Twitter
First impressions of the Intel OpenBot https://ift.tt/36qkVV4
Nov 10
DIY Robocars via Twitter
Nov 9
DIY Robocars via Twitter
Excellent use of cardboard instead of 3D printing! https://twitter.com/Ingmar_Stapel/status/1324960595318333441
Nov 7
DIY Robocars via Twitter
RT @chr1sa: We've got a record 50 teams competing in this month's @DIYRobocars @donkey_car virtual AI car race. Starting today at 10:00am…
Nov 7
DIY Robocars via Twitter
Nov 6
DIY Robocars via Twitter
RT @a1k0n: Car's view, using a fisheye camera. The ceiling light tracking algorithm gave me some ideas to improve ConeSLAM, and having grou…
Nov 5
More…