PID settings? MultiWii

[JeeebeZ]

Hi, So, this is my first quadcopter build.

I have the default settings on it. When I try to get it to fly the motors go crazy, Even before I get it off the ground. Here is a short video of multiwiiconf window once it arms, and the motors start to actually spin it just freaks out.

http://youtu.be/uiIphte5Mdg

[JeeebeZ]

So here is another video, it is of the quad copter starting at no throttle and increasing it to maximum. It does do some jumps but then instantly sits back down. 

Weighing the Quad it weighs 986g, and the motors are 2212-6 1000kv, with 10x4.5 props. So there should be enough thrust to pick it up fine.

The settings are the same as they were in the previous video.

http://youtu.be/kllTwm4lm-c

[Pauluk]

Have you calibrated your esc';s?

The motor thrust should be fairly even on all four bars in the gui.

[Soul]

Are you pulsing the throttle or is the quad doing that itself? If the latter I wouldn';t have thought uncalibrated ESCs would cause it? I thought calibration simply set the high and low points.

[JeeebeZ]

I have calibrated each esc. You can see in the first video that the throttle at the top slowly increases from 1000 to 1400. Then stops, all while the 4 motors start jumping around from 1100-1800. Without the props on it since the quad doesn';t move at all the motors spin nicely and they hold throttle fairly evenly. however once the props are on they start to go all over the place

[atomiclama]

Well here is my 2p worth, from a relative newbie that is using MWII without problems (now).

Don';t see how calibrated or not ESCs could cause that. I ran mine uncalibrated without problems.
Default PID are what I';m using without problem. So would not change them.

Calibrate your ACC, this is the biggest thing I found.
Cover your baro with foam, mine was very twitchy untill I did that.

I notice that you have no flight mode selected in the boxes, I think MWII defaults to ANGLE if none selected. I use HORIZON, makes like easy. Might be worth setting something just to be safe.

Do all the sensors give some sort of reasonable feedback when you pic the quad up and move it around?

[barneyg]

I think MWII defaults to ANGLE if none selected. I use HORIZON, makes like easy. Might be worth setting something just to be safe.

Nope ... ANGLE = LEVEL = Stabalized  ... with nothing selected you are in ACRO mode 

[atomiclama]

Opps  told you I was new to this stuff, I';ll get the terminiology sorted 

[JeeebeZ]

That is most likely the problem. How do I change modes? I am using a raspberry Pi at the moment to control the throttle/roll/pitch/yaw. That is all that I have going to the AIOP right now. I';m trying to make this semi-autonomous with feedback. So I';m putting a fair amount of additional things on it that will be controlled by the Raspberry Pi.


Edit: I think i figured it out, setting up the AUX';s on conf and sending them messages to get them to turn it on/off.

http://www.multiwii.com/wiki/index.php?title=Flightmodes <-- very helpfull to me... THX

[atomiclama]

I am using a raspberry Pi

Now I';m interested. What you doing? Aiming for? Keep us posted, I';d like to know how you get on.

For enabling the modes, I have Horizon set all the time just by clicking on the box, don';t have a seperate channel to control it.

[JeeebeZ]

I';m attempting to make an autonomous quad copter, one that will be able to fly through a building on its own. I have it flying now. I just need to determine why its drifting in one direction.

[tony]

unless you have gps then its on auto level and will sit level but wind will push it and its own prop wash will move it if your  to close to the floor