Hi,
i have built this quadcopter for my school project. I started this project recently.
Items for the project
- ArduPilot Mega w/ ATMega2560 with ArduPilot Mega IMU Shield
- 4 × TURNIGY Plush 6A Speed Controller
- 4 × 18-11 2000kv Micro Brushless Outrunner (10g)
- 4 × GWS EP Propeller (DD-4025 102x64mm)
I refer to http://diydrones.com/profiles/blogs/indoor-fun-with-a-tiny by Jose Julio for the quadcopter design. I know he had use his own code for the quad and able to fly it.
All my motors are turning CCW, and i have tilted 2 motors to counter the torque effect.
As my Mega board is a newer version (ATMega2560), i am unable to load his code.
I uploaded the ArduCopter Quad code and i know i have to change the PID values.
The quadcopter was very unstable will keep spinning on the ground and topples most of the time.
I read this http://code.google.com/p/arducopter/wiki/AC2_Tweaks
and lowered the STABILIZE_ROLL_P and STABILIZE_PITCH_P values. It was better, but still not very stable.
I have a question, does the code work with my frame with 4 motors turning CCW?
Thank you! :)
Replies
Hi all, i solved the problem and got my quadrotor to fly up.
However it wont lift off vertically. Instead, it went forward.
I tried changing some PID values.
Any advices from you guys?
Thank you very much?
Bring up my post. Need some help/ advice.
Thanks!!
hi
i am planning to make similar frame. And i have few questions
1. Can i use Arducopter 2 code???
2. Can i use counter rotating props available at hobbyking???
here is the link to props
http://www.hobbyking.com/hobbyking/store/__11327___4x2_5_Propellers...
There is one more problem. I set to 'X' configuration to fly the quadcopter and set to fly in Stabilize mode.
I held the quadcopter in my hands and push the throttle to 3/4 power. ( im using a 2cell battery now, changing to a 3cell soon). When i roll the quadcopter to the right, meaning pushing the 2 left motors up and the the 2 right motors down, it doesnt recover. Instead of the 2 right motors powering up to recover, the left motors power even more.
Any idea what is happening here?
The code is intended to be used with counter rotating props, but you could get away with it with just the right tilt angle.
I would suggest you tie a string to it on each side and get it stable indoors before flying. Try lowering your Rate P value first.
Jason
Tweaking PID is a little out of date. The D term in Stabilize is now called Rate P.