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Roll value changes with Pitch

Anil3
Associate III

Hello Everyone!

I am using ISM303DAC sensor in my project and facing an issue with Pitch value.  I have used MotionMC library and  calibrated the Magnetometer for heading. and also it got calibrated. As MotionEC_Run() function output consists of Euler angles i have printed those(roll, pitch) angles too...then i have observed one thing that if there a change in only roll axis then Pitch axis is not getting effected. but if pitch axis is changing then roll axis angles are also getting changed. 

                                Movement only over Roll Axis ------ Pitch Angle is not changing and constant --->which is OK.

                               Movement only over Pitch Axis------ Roll Angle is getting changed and it shot ---->Not OK as there is no any change in Roll axis it has to be constant right. But why the Roll axis is getting effected with change in Pitch.

How to overcome this..

Thank you!!!

regards,

ANIL.

 

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