Replies to This Discussion

Permalink Reply by Al Ros on May 11, 2011 at 9:34pm

Strange if I change my declination, it does point at different angles around north.

 

Also what about so called offset calibration like we did with the old code to account for metal and interference in the frame and for tilt/roll . my offsets remain 0,0,0 and can't seem to get into a mode calibrate these?

 

 

Al

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Permalink Reply by Russell B. Sutton on May 11, 2011 at 9:56pm

The offsets are figured automaticlynw/ AC2 so  their is no need to calibrate for offsets any more. 

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Permalink Reply by Al Ros on May 12, 2011 at 12:25pm

How does this occur and at what point??

Previously. We had to manually rotate and tilt the arducpoter around and the offsets changed to refelect this.
If this is done automatically, is it done during first flights. Should not the offset reading in climes not change from original 0,0,0?

Thanks very much
Al

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Permalink Reply by Vincent Mees on May 11, 2011 at 10:58pm

Did another test without mag enabled and the stays fix.
when changing nose direction with the tx the quad responds very crisp. Rather aggresive. You can hear the motors compensate the overshoot.
But now if I fly forward it suddenly turns without stick input. It turns about 145° and then stays fix again.
And this with the Mag off.
Strange?

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Permalink Reply by Al Ros on May 12, 2011 at 10:50am

Strange. I have had good success with mag off. But as an update, I uploaded trunk version after official beta 2.02 was releases and yaw hold is better with compass. Can anyone confirm 

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Permalink Reply by Vincent Mees on May 12, 2011 at 11:39am

I've found theorientation of my sparkfun mag

AP_COMPASS_SPARKFUN_COMPONENTS_UP_PINS_BACK ROTATION_YAW_90

So I defined this first in APMconfig but it wouldn't compile.

//#define MAG_ORIENTATION  AP_COMPASS_SPARKFUN_COMPONENTS_UP_PINS_BACK ROTATION_YAW_90

Then I change the code inthe cinfig concercing mag irientation and again it wouldn't compile.

#ifndef MAG_ORIENTATION
# define MAG_ORIENTATION  AP_COMPASS_SPARKFUN_COMPONENTS_UP_PINS_BACK ROTATION_YAW_90
#endif

 

Both with the same fault

 

ArduCopterMega.cpp: In function 'void init_compass()':
system:518: error: expected `)' before 'Matrix3f'

 

What am I doing wrong??

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Permalink Reply by MB1380 on May 12, 2011 at 2:07pm

I have a sparkfun and did not edit the code. instead mount it components down pins right. Worked for me!

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Permalink Reply by Vincent Mees on May 12, 2011 at 2:25pm

Ok but if the code supports the sparkfun it should work.

Mine is soldered directly to the IMU with the convertor in between.

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Permalink Reply by LAIC on May 16, 2011 at 11:59am

and that's the way it works

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Permalink Reply by Al Ros on May 12, 2011 at 9:27pm

Hi

 

Looking at the default defines in config.h (not apm_config.h) it looks liket they do not use the "ROTATION_YAW_90" in the define

 

How about just adding with out the leading back slashes

#define MAG_ORIENTATION AP_COMPASS_SPARKFUN_COMPONENTS_UP_PINS_BACK

 

see if that works

Al

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Permalink Reply by Vincent Mees on May 17, 2011 at 2:33am

Well it compileswithout faults. But can't test until tomorrow.

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Permalink Reply by geir on May 12, 2011 at 1:24pm

I'm also having problems with the compass. It worked grate on RC2 but now no chance, i've set dec. and it shows magnetic north but when i roll/pitch it it goes off.

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