Replies to This Discussion

3D RoboticsPermalink Reply by Chris Anderson on January 15, 2012 at 5:14pm

You battery is WAY too big for that frame (you should be using no more than 3600 for that), and as a result your whole quad is too heavy. I also think you should be using 12" props on those big motors. 

What code version are you using?

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Permalink Reply by Jereme Matthews on January 15, 2012 at 5:34pm

2.2.  Wasn't sure which one i should be using.  I thought the battery would be ok, I tired flying with my 3s 2650mah batteries and it does the same thing.

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Permalink Reply by Jereme Matthews on January 15, 2012 at 5:35pm

Any pointers on fine tuning the PID.

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3D RoboticsPermalink Reply by Chris Anderson on January 15, 2012 at 5:40pm

The tuning guide is in the manual. Because you're not using the stock motors/ESCs, you'll have to do some tuning.

You should always use the latest code. It's currently 2.2b2 and the latest Mission Planner is 1.1.21

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Permalink Reply by Jonathan M on January 15, 2012 at 5:45pm

I agree with Chris.  You definitely are in need of some bigger props with your motors.  Try the 12x3.8 SF APC props if you can get them.

For tuning have you looked at the wiki http://code.google.com/p/arducopter/wiki/AC2_Tweaks? It's pretty informative to help out with initial tuning. There are also other guides out there.  If you are using the stock settings, you probably need to lower your stab P value with your high thrust motors. That has helped with my setup

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Permalink Reply by Jereme Matthews on January 15, 2012 at 5:55pm

Thanks, I will try that. 

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Permalink Reply by Jereme Matthews on February 12, 2012 at 5:53am

Ok. I've completely redone my quad.  I purchased the 850 motors and 12" blades from DIY Drones and Its flying a little better.  But I'm having trouble fine tuning.  Does anyone have a good tuning method.  I have read all I can but I can't seem to figure it out.  The problem I'm having is the quad wants to wobble alot while its in the air, not on desent.  Also, after it is in the air a few minutes I have to fight it to keep it level, alsways wants to move foward.

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Permalink Reply by Cam Snow on February 9, 2013 at 5:11pm

Jereme - on a different note were you able to calibrate the throttle on the Turnigy Trust 45A ESCs?  I'm currently using those and I'm not having much luck...

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