Pb with octo coax with quatos (Solved)

[plexus]

Hi,
Thanks to take time.
I send to you all the elements /
Firm R445 quatos.
X8 coaxial In X.

Thrust Robbe Roxxy 2827-35: Computed with the "lady bird XML file" in the wiki.

thrustCalc.xls

(21 KiB) Downloaded 907 times

xml file:

monx8joebar.xml

(1.33 KiB) Downloaded 959 times

params file on board:

PARAMSX8 X.txt

(15.27 KiB) Downloaded 904 times

Alain

[drone-controls]

Hi Alain

The xls file clearly says the following
A1 -0.0108174649 USE THIS ONLY!!!!
A2 1.25863695800767E-005 USE THIS ONLY!!!!
On lines 44 and 45.

You have used intermediate values on lines 41 and 42.
That's the reason why the thrust was so off.
Since you have logged data only up-to 6600 RPM, I think you should set max RPM as 6500

So you must say
MOT_VALUE2T_A1 -0.010817f
MOT_VALUE2T_A2 1.2586e-05f
MOT_VALUE_SCAL 6500

On ALL the esc, be sure to set
PWM_RPM_SCALE 6500

Please make sure these changes are done and all the esc32 are calibrated with right parameters and in Closed Loop RPM mode.
Recheck your wiring is as per your sketch.

[plexus]

Hi,
All you said has been checked, but dont work.
calibration redo in CL RPM.
My config:

I used that xml filefrom JoebarC adapted to my X8 in X.

A big question: Is A= port 1 (as in QGC)
B port 5
c port 2
D port 6...

monx8joebar.xml

(1.33 KiB) Downloaded 901 times

And for the final , you have never seen a motor log like this one .

002-AQL.LOG

(2.63 MiB) Downloaded 891 times

Alain

[drone-controls]

[drone-controls]

Hi Alain

Attached is an xml from a working X8 with Quatos for you to modify.
Please use this craft geometry
port 1-Left Front Top, CW
port 2-Left Front Btm, CCW

port 3-Right Front Top, CCW
port 4-Right Front Btm, CW

port 5-Right Behind Top, CW
port 6-Right Behind Btm, CCW

port 7-Left Behind Top, CCW
port 8-Left Behind Btm, CW

In the xml, you will find a number 0.18738, you must replace it with .707* (your arm length).
Be careful with the signs and maintain them!
Use online quatosTool to generate all your params.
Use the right values of A1, A2, SCALE that you determined earlier.
Do not use QGC to generate power distribution for Quatos.

This combo has worked for others and will work on your craft too.

[plexus]

Hi Drone_controls,
Bingo, it fly very well.
All done as you said.
The mistake was in the signs and order of the ports. That was difficult to me to get the winning combination !!!
Many thanks again for your support.
Alain.

[drone-controls]

[plexus]

Ok and thanks for the info. But my gopro vib too much to made a good video.
But why not !
Alain