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quadcopter model dynamique identification

Started by telli khaled. Last reply by telli khaled 3 hours ago. 1 Reply

hello everybody I confused about quad-copter model identification , since the quad is unstable in open loop ,then how can I identify it since is unstable ??? but if I add a controllers in loop of…Continue


Started by Marco C. Last reply by Marco C yesterday. 6 Replies

Hello,I was just wondering, how much current can a 14 AWG wire handle? can anyone explain and give further detais on this matter? MarcoContinue

GPS Loiter holding issues

Started by Jeff Horton. Last reply by Jeff Horton on Thursday. 7 Replies

Im having trouble with getting the my quadcopter in loiter to keep its position.  It seems like its loosing the signal, but my gcs says the GpsHDOP is at .8 and there are at least 10 sats.  it will…Continue

tarot t4-3d gimbal compability with pixhawk

Started by Nichon. Last reply by Shawn McReynolds on Wednesday. 20 Replies

Anyone managed to get pixhawk to control the t4-3d gimbal?i've tried following the same steps in the wiki but that was for the 2 axis gimbal…Continue

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Comment by Andre Kotze on April 7, 2012 at 6:34am

Which PID value would I adjust to make my quad's rudder input more sensitive?

Comment by Jason on April 3, 2012 at 3:28pm

Ian, I have/had some trouble like this on my Jdrones Hexa... under the "Motors" command, my motors started firing out of order, instead of starting with motor 1 like it should on the hexa in + config... it started with #4 and continued around the loop. I couldn't get help on it yet, but logically, I figured if I move all my ESC jumpers 1 slot ccw, it should line my motors up properly...  it didn't, they moved one more slot further away on cw.... I am going to try and go the other direction now and see what happens tonight.

Comment by Mark Slater on April 3, 2012 at 10:57am

@Ian,  I had some trouble with Oct configuration. The correct connections are here

Comment by Adam Rivera on April 3, 2012 at 6:59am

Ian: See this link: It is already in the wiki. I am assuming you have an APM2.

Comment by Ian forbes on April 2, 2012 at 10:48pm

Need some x 8 help... Do I use Ardu coptor V2.5.3 octa X firmware?  I have all my motors setup as per wiki X8 counter rotating diagram, but when I run the motors test, it does not conform to the video in the motors test. 

 Motors are absolutely wired correctly, I disconnected and listened for esc beeps to test, and they are correct, what am I doing wrong?  Instead of 1-6 4-7 3-8 2-5 like the video, mine is firing 1-3-8-4-2-6-7-5, I can't find any info on proper firmware setup for this config, any help would be appreciated...

Comment by Bradley J Carr on April 2, 2012 at 6:04am

Here is my  configuration with all my current pids.  This is the 3DR quad with 880 motors.  Feel free to let me know if I need to change anything.


Comment by Bradley J Carr on March 30, 2012 at 4:38pm
Yes. I am. But i need to post the
Pid settings. I am not sure i had those correct.

3D Robotics
Comment by Chris Anderson on March 30, 2012 at 4:12pm

Bradley: Are you using the 2.5.3 code? The Alt Hold issue was with 2.5 but should have been resolved with 2.5.3

Comment by Bradley J Carr on March 30, 2012 at 4:09pm

Well I have had the second voyage with my 3DR quad with the 880 motors,  everything worked great.  I still need to try the failsafe but that will come when I get some of the other things tweaked right. 

1.Alt_hold-  it would be about 20 feet in the air and would drop to the ground before it would recover.  Didnt' hit the ground very hard. 

2. Loiter- Same thing as the Alt Hold except the range of it holding at the GPS location it was moving around alot about 20 feet each way. 

It flew like a champ though.  Thank you to everybody that has helped.

Comment by Andreas M. Antonopoulos on March 29, 2012 at 7:28pm

First flight today! My home made quad with APM1

Altitude of almost TWO INCHES. I was able to remain in flight for almost FIVE seconds. It was amazing :-)

I need to fix a few things, mount the propellers better and tie down all lose ends.

Soon... flight #2 and pictures or video


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