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Permalink Reply by Mark Zimmerman on March 16, 2012 at 11:50am

Video on youtube:

http://www.youtube.com/watch?v=vi2Vm3fjHFQ

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ModeratorPermalink Reply by Graham Dyer on March 17, 2012 at 4:51am

In your video your throttle stick appears to be at full when the motors are off and is pulled down to start the motors, WHY?

Also switching to any mode with the motors off should NOT start the motors if they are not running already! Something is very wrong there.

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Permalink Reply by Craig Burden on March 17, 2012 at 2:42am

Hi Mark,

Have you calibrated your IMU in the mission planner yet?

You need to make sure the quad is perfectly flat and run through the calibration process.

The problem with the APM turning off, check that your ESC's voltage cut-off is set to low. As you increase the throttle the voltage will drop and if your cut-offs are too high you ESC's will shut down. Another thing could be that you ESC's might be rated to handle a lower current than your motor's max current meaning it will automatically shutdown to prevent damage. In order to find the PID values for the quads you need to do hand and flight tests in order to determine if you want it you react faster to change or what ever you need. There is no other way to find them.

Just a few things that popped to my mind.

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Permalink Reply by Mark Zimmerman on March 17, 2012 at 2:10pm

Hi, thanks for comments. My throttle is in reverse mode. That's why when I move it to max it starts spinning when I get it to low.

When I switch to another mode as you see in video, it's going to MAX power, also when I shutdown/poweroff the RC controller (Futaba 6EX) all motors go to MAX.

I noticed recently that 2 and sometimes 3 motors ALWAYS spins faster than other motors. ALWAYS! I automatically calibrated ALL ESCs in same time using automatic mode ESC calibration. But still same thing happens, usually 2, sometimes 3 motors spins faster than 1-2 motors. Why?

Thanks

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ModeratorPermalink Reply by Graham Dyer on March 17, 2012 at 9:48pm

Well to me that's your problem number 1, your throttle must start low and go high, ie start pulled down and increase pushed up, until that is corrected nothing else will work correctly. You can't go against convention with things like that.

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Permalink Reply by Craig Burden on March 18, 2012 at 1:11am

Now I don't think it will make a difference, as long as you have reversed it properly on your Transmitter. Have you tried what I said before? I think it might solve your problem.

The motors going full throttle when you switch mode, I would think can also be solved this way. Have you set your modes to switches or are you running on the default?

I see you did calibrate your ESC's that should solve the motors cutting out at full throttle, unless, as I said you are over currenting (I don't think that is even a word, but you know what I mean) them. Now what you need to do is plug in your AMP to your PC (Make sure to unplug your motors) and calibrate your setup by going Configuration>Setup

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