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Custom Autopilot development - Theory through Implementation

Started by Wil Selby. Last reply by Wil Selby 13 hours ago. 3 Replies

I started this project wanting to learn more about the ArduCopter software that was powering my APM board and 3DR Quad-C frame. I found …Continue

Tags: equations of motion, MATLAB, autopilot, Control System, ArduCopter

GPS err in altitude vs. flying a drone at low altitute 3 mts

Started by Darius Jack on Monday. 0 Replies

Hi,I would like to study GPS err in altitude,since Cala suggested problems flying a drone at 3 mts altitude in agriculture.Laser Developer offers Lidar technology solution.Let me know your  opinion…Continue

Motor spin slow than others

Started by Cristian Rougier. Last reply by Khoa Vu on Monday. 19 Replies

Hello, all , im working with APM 2.5, in X configuration, when i arm the APM, one motor (motor 4) spin slow than others 3.When i calibrate the ESC's in automatic mode, all spin with same speed and…Continue

Noob APM/PixHawk RC transmitter coming soon to HobbyKing

Started by Tony Kenward. Last reply by Khoa Vu on Monday. 3 Replies

I am not interested in purchasing one of these, but I thought y'all may be interested. [Chinglish description text spell-corrected and posted below]--------------------------------------The Quanum i8…Continue

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Comment by Bradley J Carr on April 10, 2012 at 12:44pm

Getting ready for my first Auto FLight with my 3DR quad.  One question before I go.  I have mission planner up and running and going to make a flight plan before I head out.  When I get out there will the home alt and coordinates lock, Since I can't set those unless I am out there with the computer.

Comment by Wessie on April 10, 2012 at 12:03am

@Andre - I used to put the Yaw D value to 6 before, that gave me a crisper rudder command. Try it, let me know if it has the desired effect.


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


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