Discussions

Arducopter horizon does not level

Posted by Peter DG on February 7, 2013 at 5:53am

Hi,

I've built an Arducopter Quad (3DR) from scratch, everything seems to work just fine, but before launching into a bright sky, it I would like to have clarity on one issue.

When I connect it to Mission Planner the horizon never levels when the UAV is actually levelled. I can 't figure out how to level it without not having to keep it in an awkward (clearly unlevelled) position.

How bad is this? And how can I fix it? Does it need to be fixed, and if not what will be the consequences? When I let the Arducopter fly with a little throttle while keeping it down with one hand it seems quite stable.

Thanks for any help,

Peter

horizon.JPG

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

Join diydrones

Tags: 3drobotics, apm, arducopter, quad, accelerometer, horizon, level
Email me when people reply –
Follow

Replies

  • hexbub February 15, 2014 at 1:34pm
    Got such problem this week. Was fighting with it a couple of days.
    Calibrating accel - everything level, but drifts in the air. Trimmed and tuned in the air - not level in the missin planner.
    The reason were the ESCs - all three the same make, all three flashed with the sama firmware, all three calibrated to the same max min radio signa, but all three were starting at different points.
    Managed to flash with wii-esc and then manually, step by step with comparative testing, adjusted all those points with this flash-utility that comes with wii-esc.

    Don't know if you still have this problem, but hope it helps the others.
    All the best,
    hexbub
  • Skip Frombach February 25, 2013 at 3:33pm

    I saw this as well when I attached the new board.  My thought was to put an adjustment platform under the circuit boards so the artificial horizon could be leveled out.  Much in the way a Telescope mirror is mounted on adjustable springs.  That would be an easy fix if this is, in fact, affecting the stability correction of the craft.  Just an idea.

  • Paul Cremin February 15, 2013 at 5:37pm

    Peter I am having exactly the same problem, even when I hold the board exactly level when doing the accelerometer calibration in MP, it shows up on the artificial horizon in Flight data tab as leaning to the right slightly, after the calibration. Even if I hold the board at a angle and do the level calibration to try and trick the board into giving a level reading it slowly leans over to the right in the horizon again. I am using a new APM 2.5 but have not tried to fly with it yet, this board has replaced a APM 1. board which I have had many successful flights with. Anyone out there had this problem before ?

This reply was deleted.

Activity