APM2 Elevon #1

Hi,

I just got my APM2 soldered and installed on my delta. My only problem is that the Elevon #1 servo doesn't response my controls. In any mode. It does move correctly in 'stabilize' when it is controlled by APM. But when I move my stick, only Elevon #2 moves. Any idea why this is happening?

Also, I would like to know what are all those jumpers for? JP1-JP4.

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3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 9:54am

Is your RC transmitter in elevon mode? 

Permalink Reply by Joakim Mato on July 8, 2012 at 10:05am

I can fly my plane without the APM.


3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 10:19am

Did you do a RC setup in the MP, and select "elevon" mode?

Permalink Reply by Joakim Mato on July 8, 2012 at 10:31am

I did calibrate my radio and put a check in 'Elevons', 'Elevons Rev' and 'Elevons CH1 Rev'.

The Roll and Pitch bars move when I move my transmitter stick. So I guess APM gets the signal but doesn't put it in the output pin #1.


3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 10:32am

But both servos move in stabilize mode?

Permalink Reply by Joakim Mato on July 8, 2012 at 10:40am

Yes. Stabilization signals go on both servos. But, yet again when I try to move them with my transmitter, only #2 moves.

Permalink Reply by Joakim Mato on July 8, 2012 at 2:31pm

Well well.

This what I found out looking MP's Flight Data/Status tab. Ch1in and ch2in are somehow connected. When ch2in value goes up ch1in value goes down. And other way aroung. Like ch1in = -ch2in.

The best part of all of this is that nothing is connected to APM's input pin #1.


3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 2:52pm

Why is nothing connected to APM Input 1? I fly elevons all the time and they work fine--I think whatever is going is due to a configuration problem in your setup. Are you sure you're doing it *exactly* as per the manual?

Permalink Reply by Joakim Mato on July 8, 2012 at 3:07pm

I disconnected Rx from the input #1 just to test what is the problem with it. :)

If nothing is connected to APM Input pin #1, shouldn't ch1in be around 1500? Instead of 1245.


3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 3:13pm

Yes. Did you solder the APM 2 yourself? If so, you probably have a solder error.

Permalink Reply by Joakim Mato on July 8, 2012 at 3:35pm

Yes I did solder it. Have been trying to find a short or something without any luck.

Everything else works. Just ch1in - ch1out is crooked somehow.


3D RoboticsPermalink Reply by Chris Anderson on July 8, 2012 at 3:38pm

Check with your multimeter and see if there's continuity across the CH 1/2 signal pins. If so, you've shorted it somehow. 

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