This comes as a surprise to me.
I thought that: Xup, Xdown, Yup, Ydown and Zup, Zdown meant 6 ‘lots’ of data. The XY and Z are clearly printed on the board:
HERE ARE IMAGES OF CALIBRATION RIG
LSM303D is in the middle very near the middle of the big wooden pivoting ‘arm’, pivots on a clear acetate sheet over a printed compass rose glued to plywood on a stainless steel table.
In this pic. it just so HAPPENS to be on the ‘flat’ i.e. X and Y out horizontally and Zup.
The rig allows accurate flat (horizontal) rotation with no other rotation:
SO I AM CLEAR
Your last posting means that i am going to need some description of what you say: [quote=“kevin1961, post:65, topic:11611”]
you should only be doing 3 postions axis, x,y,z.
Here are the conventional labels for the “6 degrees of freedom” (the only one that i also use is ‘heading’ = yaw):
But when we say ‘rotate’, it may not be clear which we mean, so to clear that up here are conventional labels for referring to WHICH rotation we mean:
Can you please let me know each of:
- which three LSM303D orientations do you mean? (eg is X up the ‘same’ as X down etc), and
- which rotation. (eg turn about thetaZ, thetaY, thetaX)?
I have been fixing the LSM303D in all 6 directions and then rotating (10 degree increments) around 360 degrees of thetaZ
OMG, I think we might just be getting somewhere…
thanks in anticipation!