I got to the point in my first quad arducopter build where it came time to load the code, exciting!
With everything connected, (including ESCs) I proceeded to power up the board via USB.
The dim LED struck me as kind of odd, but at this point I don't know that what i've just done is a no. So I make 1 attempt to load the code whith no success obviously. That's when I unplugged it.
Upon closer inspection the manual I found it rather casually mentioned here:
"3. Upload the ArduCopter firmware to the APM.
I connected the battery, made a minor correction to my sketch folder name/location and the code loaded fine.
now when I power on the quad the motors beep really fast and nudge just a little....
I calibrated the esc's according to the manual and tested each motor idividually for proper spin direction
in kinderkram's build log, at the bottom (after you fry your outputs)
there is this warning
When you plug in the USB make sure you don't have your ESCs and motors connected.
Otherwise you will blow your outputs!
you guys know the next question.
Why is this warning not in the ArduCopter manual?
I have just returned to DIY drones after a break and I am starting a new project basically adding Arducopter to a gaui330x. My hardware arrived today and I just wanted to check on this issue before trying to hook everything up later on.
With the APM in its default factory state with the 4 ESC's connected should I make sure I power the ESC's from my lipo before hooking up the USB for the configurator? and in reverse when disconnecting I should unhook the USB before unhooking the lipo that powers the ESC's?
However if the ESC's aren't connected I obviously dont have to bother with the lipo?
The Gaui ESC's currently plug into the Gaui control unit with all 3 pins on all 4 ESC's signal, neg and Vcc is this ok when hooking the ESC's up to the APM or do I have to cut the Vcc (and neg?) on all but 1 of the esc's?
Just to confirm it is ok to power the APM from both usb and RC input at the same time?
Hmm, I did not read the 3 pages, so excuse me and ignore if I am saying something wrong.
I had the same problem several times, disconnecting the battery and forgetting the USB, though I never fried anything because my PC cuts off the power on the USB and I receive a message saying something like : "the USB port is drawing too much power that it can handle. USB port has been cut off, please disconnect blablabla..." maybe because it is a Mac or something, but I guess most PCs have some kind of overdraw protection...
So logically this issue should not be a problem, but there is surely a way to upgrad the APM.
Anyway just my 2 cent
Hi! When this is done, would that also affect the inputs of the RC?
When the APM does not have an output, what steps do we need to do to revive it?
The problem is a myth. As Chris said above, the worse that happens is you cause a brown out on the APM board. This is because the USB is not able to power the board and the ESCs at the same time.
What may happen with the fast beeping is that the ESC get partial power and go haywire, requiring you to re-calibrate them individually, using the calibration process for your particular ESC.