Programming MultiWii flight ctrl

Help & Support Robot Parts
1

I’m trying to program my MultiWii ctrl. I use the Arduino software and the file from Lynxmotion and upload it to the chip. I’m using the MultiWiiConf tool and I can see my throt movements and such using my TX/RX so I know it’s working… I had it working once and when I went into the CONFIG.H to change the min/max throttle numbers it would not work. Ive even tried to go back to the orgl. file from Lynxmotion and it still wont work. All my ESC have been programmed.

drive.google.com/file/d/0BxVyXM … sp=sharing

Throt showing at 1000 because the throttle is 100% down.

2

Ok Disregard, I figured out that I had to use my YAW to arm/disarm my ESC.

Now another question, I have my MINTHROT set to 1000 and my MAXTHROT set to 2000.

Here is a shot of my MultiWii with my throttle sets to 50% throttle

http://i76.photobucket.com/albums/j38/MarkFRD/Capture_zps9pcnuim3.jpg

Is the calib down with multiwii or in my RC TX

3

What exactly is the question on that second post ?
Looking at your picture, you have the throttle at about 50% and the MultiWii board is Armed. That result is Outputs to the motors (1283 to 1536 in the picture).

Everything seems to be just right on that picture.
Outputs to motor will not be stable if the copter is now flying, you can learn a bit how HERE.

If you have other questions, you can post them here. No need to create a new topic each time.

All the best,

4

I guess the question I’m tryin to ask is how do I ensure the motors are spinning the same… for example at the moment I got 2 motors that start to spin when my RCVR reads -72%, the others dont kick on till like -18%… Is this a programming of the ESC issue?

5

Where are you reading those “%” exactly and how are you connected between the Receiver and the Motors ?
Are you doing a VTail setup ?

6

The reading are from my TX… -100 is 0 throttle. 0 is 50% and 100 is 100

From my rcvr I go to the multiwii mu chip then to my esc then to motors

I’m using the v tail script from the lyxnmotion website and all electronic hookups from.the lynx. Manual

7

Ok, we think we understand your setup now.

  • First, you need to do the ESC calibration again (if you already did). Do them one by one with the Transmitter / Receiver.
  • In stock form, the ESC / Motor should start to pin at Idle when the throttle is at -100 (All the way down) once Armed.
8

Ok, so I seem to have it all in good working order however the motors still seems to spin at different RPMS. When I start to throttle up the motors kick on at different times and some start and even fade out till I really throttle up.

Then when I start to add more throttle the back end lifts off before the front, is this a trim issue? I had it in my mind that when I throttle up I was have an even lift off the ground, I’m I correct or just a noob…

9

When you “Arm” the flight controller without throttling, does the motor spin at idle at similar speeds ?
The back lifting before could be a CG problem or trim issue. In the MultiWiiConf make sure all the channels are at 1500 when centered.

10

No the motors don’t spin at idle, minthrottle set to 1000.

11

Unless you have define in “config.h” the line about “MOTOR_STOP” the motors should spin when Arming the board.

/* motors will not spin when the throttle command is in low position this is an alternative method to stop immediately the motors */ //#define MOTOR_STOP

“MINTHROTTLE” should be higher than 1000 and that’s probably why they don’t spin when you arm the board.
Set them to about 1100 and try again, you should be lowering this number until they spin very slowly but definitely turn.