Different throttle values on QUAD. See pic!

[Voguna]

Hi. At full throttle, my 4 motors are as shown in the picture. Please help?!

[scrat]

Did you calibrate all esc's? And you must have sticks travel from 1000 to 2000 and midpoint must be at 1500 because on your picture you don't have mid sticks at 1500.

Maybe this will help: http://witespyquad.gostorego.com/videos.html

And do not use old version of MultiWii WIN GUI. Use MultiWii GUI - java gui instead.

[waltr]

The transmitter is NOT setup correctly.
Is this with the quad "in the air" or tied down? Props on or off?
If you spend some time reading through all the threads that have been posted about this exact same question then you will know the answer.

[Voguna]

Where is the java based GUI?

I have calibrated the esc many times. Use D2 for each ESC and use esc calibration in sketch, then plug battery with full throttle, hear two beeps, then full down throttle, then do this to all 4 ESCs.

How can you know the tx is not set up correct? If i use right stight to the right, i get all power on the left engines and everything is logical and good for a fllight. But the throttle values travels from 1850 down to 1300 ca after 30 seconds ca. Where can i change the travelpoints from 1000 to 2000 and midpoint 1500? On the transmitter or in the code?

[kilby]

On a spectrum transmitter you would go into the model setup and choose Servo then adjust the travel of each channel to get a extremes of 1000 and 2000 or as close as you can manage

On other transmitters it will be a similar process.

The other control sticks should have a mid point (ok when the sticks are at rest in their centre position) of 1500 EXCEPT if it's a Futaba where the mid point should be 1520.

The simplest way of setting the mid point is to use the SubTrim option for each channel.

On a Spektrum transmitter the SubTrim option is also in the Servo config menu

[Voguna]

I have Futaba 10C transmitter. I will give it a try, but do you think it is the reason for the total throttle down after 15-30 sec?

[mike105105]

Obviously you didn't search around like waltr recommended or you would already know that the motors are doing that because the quad isn't in the air...that means it is trying to make adjustments that are having no effect so it keeps trying harder. It needs to be in the air for any of those motor readings to mean anything.

Those 2 particular motors, front left and rear right, are dropping because they are trying to yaw because your yaw isn't at 1500.

Mike

[Voguna]

Ok, i will try to fix my futaba transmitter settings tomorrow! Thanks a lot for help :=)

[Voguna]

Now i have used sub trim and got the values quite close to 1520. I got Futaba 10C. I had all sticks centered, while i did this. I am tired of this now. I kinda can fly, i have tried. But some times i dont have enough power to take off. If you see, i have half throttle here on this picture, but the escs are going down automatically. I followed this mans video, and hoped for the best, but it didnt work. https://www.youtube.com/watch?v=6ar59gBcf30

[waltr]

1520 is wrong for stick center value!!!!!!!!!!!! They should be 1500 exactly.

Now there is exceptions since some transmitters do not use the standard value of 1500 for stick centers.
In these cases you need to tell MW that the sticks are not centered at 1500, else your copter will not fly correctly. This is done by changing the value of MIDRC in the config.h file.

[kilby]

I pointed out that Futaba have a different centre point but didn't go through the whole setup process as it's not to much to expect people to read about the difference they have been pointed towards

[scrat]

Futaba has 1520 center.

[Voguna]

I finally got it to fly! The batteries i had was to bad. I didnt think about it, but they are to old, so i have bought new ones now. Thanks for the help!!