Discussions

number 4 motor on quad running slower than other motors

Posted by Bill Isenberger on April 30, 2014 at 5:35pm

I thought the problem might be with an ESC or motor so I changed all ESC's and motors. The problem still persist.

This is a dji F450 with extended aluminum arms (550mm) and an APM 2.6 with external compass. The first setup ESC's were stock dji 30amp OPTO. with Turnigy 5017 620kv motors. The second setup ESC's were Afro 20amp with T-Motor MT2216 900kv motors.

The quad had been flying fine with the first setup. I hadn't flown it for a while and when I took it out for a flight I noticed the issue right away.

Is there a way to see if the flight controller is causing the speed difference?

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

Join diydrones

Email me when people reply –
Follow

Replies

  • Cala May 2, 2014 at 3:52pm

    I have similar problem than RCgroups, I supposed that It was something wrong with my cuad but I'm going to try return to 3.1, Thank's for the post.

     

  • Bill Isenberger May 1, 2014 at 8:57am

    I had another quad that I thought had hardware issues. I dropped back to firmware version 3.1, recalibrated the ESC's and now it is flying fine again.

    I think it is related to the issue discussed by jabram in this thread:

    http://www.rcgroups.com/forums/showthread.php?t=2053670&page=147

    RC Groups
    RC Groups - the most active Radio Control model community: electric and fuel rc airplanes,rc helis,rc boats and rc cars. Features discussion forums,…
  • Bill Isenberger April 30, 2014 at 6:04pm

    Weird stuff!!!

    I zeroed out the COMPASS_MOT values and visually checked the motor speed. They appeared to be in sync, so I did a test flight. It actually flew pretty good considering there is a pretty good breeze.

    It seems that with the last releases of the firmware and Mission Planner something has gone awry with compassmot.

  • Bill Isenberger April 30, 2014 at 5:38pm

    I forgot to mention I'm running firmware v3.1.3.

    When I did the compassmot test the speed of all the motors appeared to be in sync.

This reply was deleted.

Activity