LibrePilot Forum

Users => Vehicles - MultiRotors => Topic started by: osuarez on January 31, 2016, 10:53:55 pm

Title: CC3D - Different behaviour without USB connection
Post by: osuarez on January 31, 2016, 10:53:55 pm

Hi everyone!

I am assembling my first quadrotor using the CC3D control board and a RaspberryPi to substitute the RC transmitter.
I am doing some tests now to verify all works good. I can setup everything OK and the display at the Flight Data (GCS) shows everything in green. I can see the different controls moving when I move the controls on the GUI running on the RPi and when I put throttle off the quadrotor arms (as I configured from the GCS). I push on the Save Button and GCS gives me the confirmation as OK.
I try again to move the motors and everything goes OK, I can go from 1000 to 2000 PWM and the quadrotor accelerates the motors and stops when I came back to 1000.

But when I try to make the same test without the USB connection the CC3D behaves quite different.
Then the motors only moves when I put throttle at 1500 ms and if I go to 1000 they doesn't stop at all!
If I reconnect the USB everything goes OK again.

I am a bit lost with this.
Can anyone give me a clue about what is happening?

Thanks in advanced,
Omar

Title: Re: CC3D - Different behaviour without USB connection
Post by: osuarez on February 04, 2016, 09:32:17 pm

does anyone have any clue about what could it be happening here??
Could it be related to an error saving the parameters on the CC3D from GCS?? The tick goes green when I presh the Save button, but I don't find any answer for this...

Thanks in advanced for the help!!
I am looking forward fly it for the first time :)

Title: Re: CC3D - Different behaviour without USB connection
Post by: NicholasDavid on February 05, 2016, 07:30:23 am

I'm confused what's an RPi?

Title: Re: CC3D - Different behaviour without USB connection
Post by: osuarez on February 05, 2016, 09:17:48 am

RPi is the RaspberryPi. I assume that everyone would understand this. Sorry!
I have edited my post :-)

Title: Re: CC3D - Different behaviour without USB connection
Post by: TheOtherCliff on February 06, 2016, 05:26:24 pm

You talked about 1000 to 2000 working correctly, but then talk about ESC's not responding correctly.

I would start with calibrating ESC's according to
https://librepilot.atlassian.net/wiki/display/LPDOC/ESC+Calibration

If there is still a problem, you may want to either try measuring the PWM sent to the ESC or use a real RC transmitter for testing to get it working, to prove that CC3D setup is correct.