Ardu-copter flipping sideways instead of taking off
- Thread starter roineust
- Start date
As much as i understand, the quad is balanced well enough - this is not the issue. i'v just tied a rope from the middle of the axis and the quad is balanced well enough. The battery is placed symmetrically in all directions in relation to the center of the quad axis. It is not a center of gravity problem, as much as i can tell, not at a level of weight set-off, which the flight controller is not able to take care of. That is, if i understand correctly the ability of a flight controllers these days. Should i re-think the center of gravity issue, up to an extremely accurate level of precision? a gram scale? that does not make sense to me.. or does it?
Quest
Well-Known Member
CG does not have to be absolutely precise no, but the closer the better, less stress on motors, esc and fc. What transmitter and receiver are you using? You could have issues with the way you have these set up. You may want to consider starting from scratch. Delete you model, reflash your fc with ardru plane then reflash with ardrucopter, remove all your transmitter and receiver settings etc and start fresh.
Here is a video of the phenomenon, you can see i am pushing the throttle stick up 3 times - and letting it back down every time - since i already know it ends up in a flip at the direction it starts tilting in the video. That is, i don't want to push the throttle any further and damage the props more than already damaged in previous 5-6 full flips:
http://sendvid.com/4qy53uuc
http://sendvid.com/4qy53uuc
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Jackson
USA member at large
Maybe this will help. Note the Motor Output legend.
Just follow the order of the wires off the loom and go by the QuadX layout in Mission Planner.
Looks like White is motor 1. Blue is 2, Yellow is 3 and Green is 4. If your colors aren't the same just go by the order you see above.
Just watched your video, that is certainly not a COG problem. Are you using the correct props along with the motors spinning the right way? It looks like you are either using CW props on CCW motors on the front or they are spinning the wrong way.
RENOV8R
Well-Known Member
Getting closer. So, if the correct motors are now responding in the motor testing tab of your GCU (move motor 1 slider and motor 1 responds, etc.) but are spinning in the wrong direction, you'll have to switch any 2 of the 3 motor wires to reverse it's rotation. Isn't this fun? Hahaha
The direction of the motors is not determined by the data cable but the three phase coming out of the ESC, swap any two of the three wires and you will reverse the direction of the motor.
The three phase side is the part marked "Bullet connectors"
OK -
Now i got the FC channel wires and props CW,CCW and motor directions and ESC's 3 bullet connectors to motors - All exactly as indicated above and shown in pictures - and now i have a non flipping situation, but not in a good sense - the quad just sits there like a solid rock, even if throttle is at 80% force.
Now i got the FC channel wires and props CW,CCW and motor directions and ESC's 3 bullet connectors to motors - All exactly as indicated above and shown in pictures - and now i have a non flipping situation, but not in a good sense - the quad just sits there like a solid rock, even if throttle is at 80% force.
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Just to be on the safe side, here is a written description of what i have right now on the quad, in relation to the picture above:
1. The front right prop is a CCW type, the motor attached to it is spinning CCW and it is connected to the black,red.white wires - which is channel number 1 and the only channel that has 3 wires and not just the data. Of course data + and - are connected right.
2. The rear left prop is a CCW type, the motor attached to it is spinning CCW and it is connected to the blue wire of channel number 2.
3. The front left prop is a CW type, the motor attached to it is spinning CW and it is connected to the yellow wire of channel number 3.
4. The read right prop is a CW type, the motor attache to it is spinning CW and it is connected to the green wire of channel number 4.
Result: 'solid rock' - not flipping at all- neither moving at all, at almost max throttle.
1. The front right prop is a CCW type, the motor attached to it is spinning CCW and it is connected to the black,red.white wires - which is channel number 1 and the only channel that has 3 wires and not just the data. Of course data + and - are connected right.
2. The rear left prop is a CCW type, the motor attached to it is spinning CCW and it is connected to the blue wire of channel number 2.
3. The front left prop is a CW type, the motor attached to it is spinning CW and it is connected to the yellow wire of channel number 3.
4. The read right prop is a CW type, the motor attache to it is spinning CW and it is connected to the green wire of channel number 4.
Result: 'solid rock' - not flipping at all- neither moving at all, at almost max throttle.
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