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Old Jun 22, 2010, 07:02 AM
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It's fly ...!


ok , I done the soft mod you say , reversing the yaw and ail channel on transmiter and it's fly


Default PID are correct, no need to change

juste put some expo and limit to have a tri flying indoor for now because it's very speedy

I wlill test it on outdoor this evening after the work


very cool, just noticied one thing, some big oscilation on the yaw axes when there is air turbulance, need to test with wind now...
is there a possibility to decrease the gain a little on the yaw axes ?

Now I can afirm that soft working great on a std Nintendo WII and only on M168P or old arduino pro 168 board

the only thing is to desactivate the 400 khz i2C speed like see before.
I don't notice any change on the stabilisation, I do several test to put full trottle in flight at one meter of the floor after a desent and the tri get steady in one second...
very good

next step for a stable mode with nunchunk ?

thank you Alex

I'm hapy
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Old Jun 22, 2010, 07:04 AM
www.shop.trisembly.co.za
rcimports's Avatar
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Hello,

Just want to make sure, is this the Wii MP controller I should buy?

Thanks!
Dion
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Old Jun 22, 2010, 07:18 AM
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somewhere in space
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Quote:
Originally Posted by rcimports View Post
Hello,

Just want to make sure, is this the Wii MP controller I should buy?

Thanks!
Dion
Hi Stephan ,

yes it's the wmp, with arduino pro mini.

cost is very cheap aprox 30 to 40 $ for cpu + sensor
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Old Jun 22, 2010, 07:43 AM
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Paris, France
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Quote:
Originally Posted by tazdevil View Post
It's fly ...!
Default PID are correct, no need to change
cool!

default PID are correct to allow a good fly, but you will have a much more stable tricopter if you try to tune it, especially the P parameter.
(my current P term is 4.2 without any oscillation)

Quote:
juste put some expo and limit to have a tri flying indoor for now because it's very speedy
there is already an expo inside the code, it's maybe not sufficient. you are not the first who tell me that.

Quote:
very cool, just noticied one thing, some big oscilation on the yaw axes when there is air turbulance, need to test with wind now...
is there a possibility to decrease the gain a little on the yaw axes ?
Yes, for yaw, and for the moment, there is only one parameter which is PYAW.
By default it is 8
if you want to change it, edit the line
Code:
  PYAW = readFloat(YAW_PGAIN_ADR);
=>
Code:
  PYAW = ??? ;
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Old Jun 22, 2010, 07:49 AM
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ok I'll done the test with more p gain , (I've not the screen , i need to update the shield

and will try 6 for yaw to see what it's done

my tricopter is small with xufo propeler and 20 cm arm aproximatly
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Old Jun 22, 2010, 10:10 AM
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ok , 4.2 is fine , need to check in wind , ( I go now to test it ..!)

6 is good on yaw with modifiy the hole pôsition more neer the center of the servo on harm

i'm happy , it's equiped for fpv right now with light 2.4 ghz camera 5 V , let's do the test

if it's ok , I will change the camera for a better one

need to order a screen now or modify the soft for serial command on hyperterminal for pid setting R W on eeprom

have fun
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Old Jun 22, 2010, 10:54 AM
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Quote:
Originally Posted by Alexinparis View Post
Hi,

Very good news !
So apparently the original WMP does not work very well at 400kHz fast mode.
=> just comment the line if you are in this situation:
Code:
//  TWBR = ((16000000L / 400000L) - 16) / 2;
Excellent information for building one of these. I do have one question though. How do we tell the difference between the better Wii Motion Plus and the "original" Wii Motion Plus?
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Old Jun 22, 2010, 11:09 AM
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Originally Posted by Sid3ways View Post
Excellent information for building one of these. I do have one question though. How do we tell the difference between the better Wii Motion Plus and the "original" Wii Motion Plus?
The original WMP is the only one with a small metal case on its PCB (X3500W component)
http://wiire.org/Wii/MotionPlus
All the copies I saw have not this metal case component.
Exemple: http://www.dealextreme.com/details.dx/sku.32506

Wiimote uses fast I2C mode to communicate with WMP.
So this erratic operation does not mean copies are better than the original.
It’s just a problem of couple Arduino-WMP.
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Old Jun 22, 2010, 12:00 PM
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Quote:
Originally Posted by Alexinparis View Post
The original WMP is the only one with a small metal case on its PCB (X3500W component)
http://wiire.org/Wii/MotionPlus
...
this is history

WMP is the new development ISZ-650 / IDG650
- http://invensense.com/mems/gaming.html


jürgen
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Old Jun 23, 2010, 04:33 AM
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Originally Posted by JUERGEN_ View Post
this is history

WMP is the new development ISZ-650 / IDG650
- http://invensense.com/mems/gaming.html


jürgen
this is why ...

my tricopter fly good in the wind, just put some trim correction sometime (it's not adxr gyro acc would be help a lot) but it fly great even with the battery just connected by the power wire like an heli who make marchandise transport under it with a cable

I thingk an acceloremeter could be great for beginer and fpv

I'l try fpv, and it was more difficult than will tricopter who ismore stable

my tri has tendence to "autocabre" (don't know the word in english) so with a fish eyes camera it is difficult to pilot at low altitude


I think it will be not complicate to adapt a nunshunk on it with all the exemple there is on th web

let's see, what do you think alex ?

another thing , piro rate is very low, anything to do it more accurate ?

i'm happy
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Old Jun 23, 2010, 06:00 AM
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Alexinparis-

Are you using three gyros for stability? I only see two connections to analogue 5 and 6.

Is it a 12c thing where all three gyros signals can travel through just two pins?

Quote:
Originally Posted by Alexinparis View Post
...WMP includes 3 gyros + ADC + I2C + low cost. This explains its success !
Cool. I'm not familiar with how 12c works so I'll take it this means 3 gyro signals can go over just two 12c wires.

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Originally Posted by Alexinparis View Post
I can still improve yaw correction to reproduce a sort of head lock behavior.
Nice. Please do.

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Originally Posted by Alexinparis View Post
...Ok, I will think about it for a variant. A nunchuk is even cheaper than WMP.
Now we're talking. Just an accel, no magnetometer or other junk.
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Old Jun 23, 2010, 07:53 AM
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Paris, France
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Quote:
Originally Posted by tazdevil View Post
my tricopter fly good in the wind, just put some trim correction sometime (it's not adxr gyro acc would be help a lot)
I can still improve yaw correction to reproduce a sort of head lock behavior.
For the moment, it's only a proportional counter action.


Quote:
I thingk an acceloremeter could be great for beginer and fpv
I'l try fpv, and it was more difficult than will tricopter who ismore stable

I think it will be not complicate to adapt a nunshunk on it with all the exemple there is on th web

let's see, what do you think alex ?
Ok, I will think about it for a variant. A nunchuk is even cheaper than WMP.

Quote:
my tri has tendence to "autocabre" (don't know the word in english) so with a fish eyes camera it is difficult to pilot at low altitude
This is generally due to low P and D settings. You should try to go to the limit of PID setting

Quote:
another thing , piro rate is very low, anything to do it more accurate ?
you mean yaw axis rotation ? or roll/pitch axis ?

Quote:
i'm happy
me too

Quote:
Are you using three gyros for stability? I only see two connections to analogue 5 and 6.
Is it a 12c thing where all three gyros signals can travel through just two pins?
WMP includes 3 gyros + ADC + I2C + low cost. This explains its success !
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Old Jun 23, 2010, 09:02 AM
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North Italy
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Quote:
Originally Posted by tazdevil View Post
this is why ...

my tricopter fly good in the wind, just put some trim correction sometime (it's not adxr gyro acc would be help a lot) but it fly great even with the battery just connected by the power wire like an heli who make marchandise transport under it with a cable

I thingk an acceloremeter could be great for beginer and fpv

I'l try fpv, and it was more difficult than will tricopter who ismore stable
You have got the point, FPV is nearly impossibile without autostable mode (with accelerometer), you can try BaronPilot that have also this mode (link to thread).
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Old Jun 23, 2010, 09:17 AM
FPV Junkie
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somewhere in space
Joined Aug 2006
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Quote:
Originally Posted by Alexinparis View Post
I can still improve yaw correction to reproduce a sort of head lock behavior.
For the moment, it's only a proportional counter action.



Ok, I will think about it for a variant. A nunchuk is even cheaper than WMP.


This is generally due to low P and D settings. You should try to go to the limit of PID setting


you mean yaw axis rotation ? or roll/pitch axis ?


me too


WMP includes 3 gyros + ADC + I2C + low cost. This explains its success !
yes i mean yaw axis


when I spek of nunchunk it's wmp and nuncunk both


the problem of autocabre was due to my propeler to smooth (xufo silverit)
I put maxprod one and it's look very better , but one controler have a probleme now?... grunt , do no why it's seem to detect only one lipo at startup ...


bbut when I plusg it directly to a receiver it's working, when plug it on tri board , motor start at init and stop a few second later.

other motor still working???

I swap 2 controler same problem on another output of the tri board, so I've got a probleme with my simple controler......

need to order new one .. MDR

yes yaw need PI cause it's oscilate a lot when you turn the yaw and return quicly to the neutral position of the stick.

heading is very correct

waiting improved soft, once again good job and thank you
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Old Jun 23, 2010, 09:20 AM
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