2012/7/10 Ralph Stirling <ralph.stirl...@wallawalla.edu>:
> As I am moving through my linear motor project, I've come down to
> a place where I need some ideas.  The carriage for my motor is 4in
> long, and my coil sets are 6in long.  The magnets are on the moving
> carriage and the coils are stationary.  Part of the reason for this is
> that I don't want electrical wires going to the carriage; it is entirely
> passive.  For feedback I use AS5311 linear magnetic encoders, with
> a 4in magnetic strip attached to the carriage.  I am placing the
> encoder sense heads every 3in along the track.

Besides all the arguments pointed out by Chris, I have also doubt for
the cost-effectiveness of this approach:
1) isn't the magnet track cheaper than windings for linear motor?
2) the same for encoders as well - I suspect that magnetic strip
should be cheaper than the reader unit itself;

-- 
Viesturs

If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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