I have been making a resolver to quadrature converter for a
couple of years.  I finally was able to buy some sections of
Inductosyn scale on eBay for a price I could afford, and
started working with it.  I found that if I put a 120 - 6.3 V
filament transformer in the excitation circuit, the excitation
driver on my board can drive it without overload.  I then get
up to 50 mV P-P out of the sense coil.   I then set up a 100:1
differential amplifier, and get signal levels that would be
compatible with the AD 2S1200 chip that decodes the
Sin?cos output.  I don't have a
complete Inductosyn set, so i am using additional sections
of the scale as the sense winding.  I would guess the real
sense windings are shorter, and the pair of Sin/Cos windings
are less than one scale segment long.  The scale segments are
10" long, and appear to have a winding pitch of .1".  The
winding is about 2" wide.  One question is how close are the
windings spaced?  Right now I'm using a piece of printer
paper to space them apart, but that is just a guess.

Thanks for any info on how these are typically installed on
actual machines.

Jon

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