>#1 ) Has anyone on the list tried to use a LM to
>track the motion of a linear motion stage ?

Hey, thats a good idea - just what one needs to build a pick-n-place machine 
for PCBs ...

haven't tried it, and to use a LM for tracking a vehicle ground motion could 
be awkward, as all detection would be relative to the direction the vehicle 
points, which may not be what you want. 

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