Hi..

So just finished my first 450 build. It looks clean. It's balanced. Weight is under 900g. Motors have a thrust of approx 2.6KG.

The problem is when I'm at min throttle just to get the motors spinning, one of the motors (depends on direction of the quad) spins higher than he rest n then goes to full speed. This happens on almost all modes. Especially in angle mode. If I give something more than min throttle even by a bit it just flies outta control.
I'm using naze32 rev 6 with clean flight. I haven't changed any PID values or any other values. ESC's have been calibrated. I got no idea what I'm doing wrong. I make sure it's on a stable flat ground during power up, Everything looks good. So I guess it's the software part.

Can someone please help me out? :/

Try calibrating the ESCs once again - At times it needs it
IF that doesnt work - Try flashing your ESC with newer firmware (i am guessing it must be BLHeli)
Try redoing the soldering - maybe thats having some issues.

I am guessing it is an ESC related issue. You can try to redo a complete run through from clean-flight

Calibrated the ESC multiple times. Solder n all is perfect. There is slight vibration with motors but I guess it's alright. But mostly the problem I suspect is with the FC( naze32).. it just flips on take off n even if I put throttle to 0 it still hovers at times (throttle calibration done too).

At times it flies straight up without a problem but most of the times it just flips or crash lands hard. My friend who has experience with quads tried to fly but still no use. I got dampers on FC. Weight distribution is satisfactory. He told me to try cc3d..

Also, how do I flash bheli? The current firmware is simonk . It's the emax 30A ESC n xa2212 motors..

On putting it into angle mode it just goes haywire..

Sounds like the accelerometer needs calibration, the FC thinks the quad is tilting and is trying to correct it. IMO, it's a normal behavior on ground on min throttle. Post some Pics and video of Quad as it may be helpful in resolving the issue.

This may help you out if it is the case:

Video is unedited.

1. Motor connected to wrong header or wrong order?? check in cleanflight GUI Motors Tab > Spin one at a time and confirm the correct one is spinning in right direction. Remove props before checking.

2. Check your Board Alignment.

3. Check your Midpoints / Endpoints / Trims. in Recievers Tab, the travel for all channels should be from 1000 to 2000 and midpoint set exactly at 1500 (or 1520 depending on what tx/rx you have).

4. Battery / prop specs?. also post your pid settings. i ain't no expert in PID's but let me have a look.

Here is a video that talks about BLHeli flashing -

1. Checked.
2. Checked. But will the damper cause any problem? I'm gonna try it with the board directly mounted with sticky tape.
3. Yeah..

4. Battery is 3kmah 20x turnigy. PID is all default.

what fc firmware you on?

I'm on clean flight.

1. Please check your motor / esc connections ...I feel there is some discontinuity
2. Since its taking off - ur motor setup and prop setup looks good.
3. As suggested earlier check ur motor layout setup.
4. Calibrate the ESC
5. Calibrate the accelerometer
6. Calibrate ur radio
7. Hope your FC is centrally mounted and is in correct orientation.
8. Check for quad setup in clean flight - X quad / H Quad / + quad

Please let us know if the issue still exists.

Btw what motors are u using ??

Looks like a case of Failed Gyro.

1. Double checked.
2. Hmm
3. Layout as in direction right? It's fine.
4. Done multiple times. It all starts together.
5. Done before each take off on a flat surface.
6. Done.
7. Yep.
8. What exactly did you mean by that?

Emax xa2212 with matching 30a Simon k ESC.



Gyro? But looking at sensor values it seems alright.

What I'm suspecting is the I values in PID because when it takes off it goes straight without a problem n then starts to wobble(not oscillate, so not P). I'm gonna try it with less I n see. Maybe try in flight calibration using the 2 pots on TX..

Instead you try out with some other flight controller if you have one. It would make your work easier to judge what is wrong FC or ESC or motors.
Motors with different kV may also be a reason.
The ESCs may be faulty.
FC may be faulty.
These are possible chances

Well, it flew! I changed the PID tuning to the knobs and changed to acro mode. It flew wonderful. Like too cool! But broke one of my receivers ant. Meh. It flew pretty cool. Acro was damn stable too..

Pid might be over compensating > leading to vibration > leading to FC freaking out

Yep. I think it's the I value. I reduced it by a few units n it's damn stable.

Thanks y'all! You've helped 10yr old dream of a guy :')