Hi, I have been using Librepilot for a couple of years with quads, but recently purchased a Kingkong Hex300, bnf. I am using it with a modded Eachine transmitter, and IA6B receiver, using PPM. I have had problems with the hex from the start. I have never been able to run the motors using the Wizard ... they just will not run. After replugging the battery on Wizard at motor calibration, however, there only seems to be ten confirmatory beeps, instead of the expected twelve.
Bear in mind that this hex has been set up at least a dozen times on Llbrepilot, and the motors have never spun up on Wizard. As a result, I have set them manually, and have never had a problem with this method.
When setting them manually, however, after pressing home after the first beep, I never get a beep or series of beeps for the six ESC,s jus a short musical tone.
I had it flying perfectly, until a pretty heavy crash.
It has been impossible to set up since then.. number one motor was not spinning, and on checking, the PCB had a fault, and was not supplying a signal to that motor, so I jumped a wire from the number one motor output on the FC to the number one ESC and fixed that. I then notice that the PCB was not powering the receiver, so another jumper wire fixed that.
I have now set it up on Librepilot using Generic Hex, with the FC angled 90 degrees to the right, so yaw has been set to -90 degrees.
The motors have been calibrated manually, and all react to the sliders properly.
The motors are set to idle at arming. No 1 motor needs more to run smoothly than the other 5, ie the other five run smoothly at about 1035, while number one needs about 1060.
I also had a faulty motor at number 5, and have replace it with a similar size but slightly different kv, that is, the other five are 2280, while the replacement is 2300.
When I arm it, all the motors are running smoothly, and if I move the controls, the quad reacts to the movements while still on the ground correctly.
However, when I try to take off, at very slow throttle opening, it will lift about a foot in the air, then all of a sudden, the motors will rev, the quad will leap into the air about a foot or so, then violently flip forward onto its back.
I thought, when number on motor was not running, I may have had a problem with the ESCs, but the motors all react properly on manual calibration, so surely this points to the ESCs being ok.
I have replaced the FC with a new one, but no change.
I have spent a week solid on this, and am about to turn it into parts.
To me, it appears that the FC thinks the quad is upside down, and tries violently to correct that, but then, wouldn't that affect the way it behaves to the controls before it becomes airborne? The FC is the right way up, just facing 90 degrees to the right.
Can someone suggest something?
thanks Dave.