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are my accelerometers borked?
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TiagoTiago



Joined: 20 Jan 2007
Posts: 709
Location: Brasil

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PostPosted: Mon Jun 25, 2007 9:57 am    Post subject: are my accelerometers borked?

is there a way (under winxp) to evaluate if ther accelerometers of my wiimote are really working as they should? (somtimes I seem to get unexpected results as well some lack of precision some times, which I used to dismiss as just an issue with the algorithm used on the gpie script)
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speaker219



Joined: 28 Jan 2007
Posts: 187
Location: New York

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PostPosted: Tue Jun 26, 2007 8:05 pm    Post subject:

Try WiinRemote, it has a little accelorometer graph that might help you.
http://onakasuita.org/wii/WiinRemote_v2007.1.13.zip
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TiagoTiago



Joined: 20 Jan 2007
Posts: 709
Location: Brasil

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PostPosted: Wed Jun 27, 2007 1:26 am    Post subject:

speaker219 wrote:
Try WiinRemote, it has a little accelorometer graph that might help you.
http://onakasuita.org/wii/WiinRemote_v2007.1.13.zip


that brings me back to the thought it is an issue with the algorithm, perhaps of gpie itself.....
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R.Legault



Joined: 24 Feb 2007
Posts: 111

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PostPosted: Wed Jun 27, 2007 2:36 pm    Post subject:

Try recalibrating you wiimote(s) if you haven't already. There is a GlovePIE bug with wiimote.roll (and possibly other data?) in scripts containing IR code when the wiimote has not been calibrated properly.

I am not totally sure but I think the reason behind this is if you have paired more than one wiimote with your computer. I think GlovePIE does not detect the appropriate wiimote order and assigns each the other's wiimote calibration settings which causes problems.
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TiagoTiago



Joined: 20 Jan 2007
Posts: 709
Location: Brasil

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PostPosted: Wed Jun 27, 2007 9:34 pm    Post subject:

only one wiimote, and I belive I've calibrated it right, including paying atention to leave the strap beyond the edge of the table, and still the values don't stay as close to zero as I owuld expect and somtimes they tend to do random big jumps out of no where
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DMonk



Joined: 27 Sep 2007
Posts: 6

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PostPosted: Thu Sep 27, 2007 6:39 am    Post subject:

Two days ago i (finally) bought a wiimote, and it has small jitter on X and Y. When placed on a surface, the values don't stay put. Just like a (used?) analog joystick.

Is this normal?

Maybe i should mention that otherwise they work as expected, measuring acceleration that is... And since Z is 'clean' (no jitter), there probably aren't any outside forces that might perturb gravity (like poltergeists)...

So, do other 'motes have this issue, or just mine? Thanks..
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acapulco



Joined: 05 Feb 2008
Posts: 13

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PostPosted: Sun Feb 17, 2008 8:23 pm    Post subject:

Well DMonk, I don't know if it's a problem, but mine does that too. Not big jumps or anything, just lying on a flat surface the X and Y values will shift back and forth between two close values, like from 89 to 8A and back to 89, etc. I believe the accelerometers mut have some sort of "noise" that can't be filtered out in a 40dls device?

Maybe it's the way they are positioned, because like you said, the Z values are stable .
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