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Re: [Paparazzi-devel] Umarim IMU Issue

From: David Conger
Subject: Re: [Paparazzi-devel] Umarim IMU Issue
Date: Mon, 08 Oct 2012 20:32:17 -0700

Hi Craig,
Where did you get it? 
I ask because I own PPZUAV and I have found all of the ITG3200 are having 
issues. It is due to assembly ( They claim they followed the exact 
reflow guidelines I can't explain how all 100 units the itg3200 either works as 
you mention or just doesn't work at all. To be safe I'm replacing the gyro on 
all of the boards even though they are new. 
If you purchased from PPZUAV write an email to address@hidden ASAP so you can 
get it replaced. 

On Oct 8, 2012, at 8:03 PM, Craig Smith wrote:

> Hey all,
> I've got an Umarim lite v2 that I recently picked up, but the gyroscope seems 
> to spaz out every now and then, throwing the AHRS off by quite a bit.  Anyone 
> else having the same problem?
> I've attached a plot of the gyros spazing out and a plot of theta and gp.  
> You can see that its physically not moving (accel_y is constant), but theta 
> is changing due to the gyros. 
> To me, it looks like a driver issue misreading a pcket, but I dunno, maybe a 
> bad gyro...  I'm using the example Umarim airframe with the float_dcm ahrs...
> any thoughts?
> -- Craig
> <12_10_08__19_28_20_gyros.png><12_10_08__19_28_20_theta.png>_______________________________________________
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