[suzali]

Hello,

I'm new here, just posted in 'Introduce Yourself'

Set up a 450 clone heli from scrath.
All worked well, thanks to your videos and turtorials. (Thank you !!)
But I have the following problem:

All controls work, can hover a little but only in manual mode for pitch and roll. (Rate on yaw is ok)
If I choose any other mode like rate or attitude and spin the motor up, it suddenly dies. Not at a specific point, but always roughly above 25 % throttle.
Sometimes even the collective goes all negative. Afterwards I have to arm again. But no chance to spin the motor really up. As initially said: no problem in manual mode. 

Hopefully waiting for useful hints,
Albrecht

[TheOtherCliff]

If it can be done safely, then right after it drops, without doing anything else, plug the USB into the GCS and see if there is an alarm in System Health box on the Flight Data page.

[suzali]

thx, will try that tomorrow & report here.

[daveapplemotors]

Post your uav and perhaps we can find the trouble.

[suzali]

Here comes the uav

[daveapplemotors]

Three questions:

Did you do manual calibration? And if so did you have all the defaults set? Throttle and Pitch curves- under Inputs default in TX. No expo, no DR, no tall (revo ) mix. (Be careful to move your sticks along on axis only during calibration.)

What happens in system under HW settings if you change the neutral value for channel one to 902 instead of 947?

[suzali]

Did you do manual calibration?
Yes, multiple times. (do you mean RC-Input?) 

And if so did you have all the defaults set?
I don't know, which defaults you mean, or where to set them? I started with a "clean configuration"

Throttle and Pitch curves- under Inputs default in TX. No expo, no DR, no tall (revo ) mix. (Be careful to move your sticks along on axis only during calibration.)
Yes, all done exactly as described.

What happens in system under HW settings if you change the neutral value for channel one to 902 instead of 947?
When calibrating the system sets the 947 value itself. If I change this to 902, I can't arm anymore.

[suzali]

I just attached the heli via usb to the gcs when spinning up:

1. correction: other than described before, I do not have to arm after the shutdown.
    If I leave the throttle in the position where the motor stalled,  it starts spinning again after about 2-3- seconds.

2. I get two shortly visible messages in the system health panel:

• RC INPUT: warning One of the following conditions....
• EVENT : There are problems with UAV object events or callbacks

Again: I can spin up and even fly (a little) in manual mode

Hope these messages will help, there is no cc3d-onboard memory to extract?

[daveapplemotors]

More questions:

Did this motor/ESC setup work before you tried CC3D? Is the ESC the right amperage? I tried an CC18 on a 22 amp motor once and it behaved about like you are describing.

You can connect your radio to the ESC without using the CC3D board to test ESC / motor.

[suzali]

Yes, it worked before. I use a 40 Amp ESC.
I connected ESC directly, no problem. Same in manual mode (pitch & roll).

Do I have to do an ESC calibration in CC3D ?


Is the following  a mistake ?
- I use the left tx stick (up/down) for collective but for throttle I use a potentiometer on an extra channel   

[daveapplemotors]

That sounds evil to use TX like that. Yes have TX do all calibrations.

[suzali]

Sorry, I don't quite understand.
Must I use throttle and collective simultaneously?

On other helis without a flightcontroller I have a switch for motor on/off or idle1 and idle2.
Why are there two channels in CC3D, one for throttle and one for collective?

[daveapplemotors]

Maybe they have 2 channels to keep motor speed and pitch independent of each other. 

I never got the transmitter wizard to work but manual calibration works for me.  With TX defaults-clean setup try to go through "Manual Calibration" with normal set up: channel 1 =throttle, 5= gear and 6= collective. You might be tricking the CC3D software with your throttle setup. I don't know.

After I do "Manual Calibration" I normally reset Channel Neutral values for 1 and 5 closer to Channel Minimum. When I forget that step I get a jumpy swash.   

[suzali]

Ok, I just changed / concluded the channels.
Throttle and collective have the same input.
New calibration...
...and the final test...

nothing has changed
Same behavior in auto mode, everything normal in manual.

This really drives me crazy

[daveapplemotors]

Yes. frustration. I just checked your UAV again.

What happens if you raise the neutral value on collective a little ?
And the low value to just above the low on throttle?

I keep neutral value just a couple of points higher than low. on both throttle and collective. 

What TX & RX? maybe someone else has matching equipment...