Replies to This Discussion

Permalink Reply by Michael Pursifull on June 27, 2012 at 8:39am

How are you powering the board? You cannot run servos from USB. You must have another power source to drive the servos. 

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Permalink Reply by gary on June 27, 2012 at 11:09am

Mike, Powering from my receiver power, do I need another source as well.

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Permalink Reply by Michael Pursifull on June 27, 2012 at 6:56pm

That's not the recommended wiring for power, have a look at the wiki. But it should usually work.

Look to see if you have jp1 installed. If not, then you need a power source on the output rail also. If it is installed, then your servos should work. How do you know they don't?

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Permalink Reply by gary on June 28, 2012 at 9:12am

ok jumper 1 was installed, removed it still the same. I know the servos are not working because can move by hand and no response when i use radio. So installed a power source onto the output side connection 8 and servos now work. Strange think is it work if the jumper is on or off no difference. Can I leave this like it is or do i need to change something. I am not that technical and reading schematics and pcb is way beyond my skills.

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Permalink Reply by Michael Pursifull on June 28, 2012 at 10:55am

Did you calibrate your radio?

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Permalink Reply by gary on June 28, 2012 at 11:08am

yip, calibration is good

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Permalink Reply by Zachary Eldridge on June 28, 2012 at 7:33am

@Gary Plug the Bec into the output Channel 3 and make sure the jumper is in place. That will power the board and reciever. No need to have bec plugged in reciever it will draw power from APM2.

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Permalink Reply by gary on June 28, 2012 at 9:14am

APM is getting power from outputs of receiver i think. Servos are now working with an additional power source plugged into channel 8 as this is a channel which is not being used. All servos working now with jumper removed,,,no difference if i install jumper or not...very strange this is not written anywhere

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Permalink Reply by Michael Pursifull on June 28, 2012 at 11:11am

If you are able to power the servos directly from the output rail w/o jp1, but not via the input rail w/jp1, then you maybe blew the diode onboard by shorting the rail at some point.

Using a bec to power the input rail separate from the esc's BEC on the output rail is a common configuration (remove jp1)

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Permalink Reply by Stephan Hiltenkamp on June 28, 2012 at 7:12am

Check the back of the board. Next to the connectors 9 10 and 11 you will find solder-pads. Those are the default connectors for the camera gear (roll, tilt, release).

With the solder pads (I believe after a look into the schematics) you can select whether you want the connectors to be analog inputs or PWM outputs. First check that there is a PWM signal on one side of the pads, then check that there is no permanent bridge between the middle pad and one of the outer ones. If there is no connection to the middle pad and there is a PWM signal on one of the outer ones indeed, solder-bridge the middle pad and the one that carries the PWM signal.

Let me know how this goes - I am currently putting together my gear. It will be a while before I put a camera onto a servo-mount but that is the intended purpose of the vehicle. I saw the pads yesterday and since no solder pad on my board has any solder, I downloaded the schematics to check what they are doing (or what I think they are doing) since I couldn't find any better documentation.

Otto

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Permalink Reply by gary on June 28, 2012 at 9:20am

Please read my other replies. I have no idea what you talking about. All i know is this is supposed to be the latest APM 2 board....hope i haven't made a mistake going this route . As for selecting the type of inputs,,, is this a hardware adjustment or something done via software. I looked on the software , nothing there that allows me to change anything with regards to input signals. My radio system is Futaba FASST outputs should be digital and not analogue.

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Permalink Reply by Zachary Eldridge on June 28, 2012 at 9:26am

Take picture of your setup and I be able to help you better. Thanks

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