This is all regarding this old Troyke CNC rotary table that I wanted
If you recall, the latest stumbling block with the rotary table was
that it was using a old technology "resolver" for position feedback.

I was able to get a hold of Joe at Harowe, who made this
resolver. Apparently, this resolver is still in surrent production and
sells for a modest sum of $1,423.00.

http://www.dynapar.com/Accessories.a...BRW-300-F10/10

Joe emailed me a diagram of this motor with all electrical
information.

http://igor.chudov.com/manuals/Harow...300-F10-10.pdf

This looks like super duper space age technology from very many years
ago and is, apparently, a high quality product that is likely in good
shape.

So, at this point, I have two routes to take:

1) Attach a shaft extension in the back and a new encoder from US
Digital
or
2) Add a resolver to encoder converter.

Both have the same cost, these ir some machining involved in both
cases. In the first I have to add a shaft extension, in the second I
have to add an enclosure for the converter and a plug/receptacle to
the rotary table. This is so, because I may need to unplug the rotary
table and remove it from the mill from time to time.

After some thinking and talking to EMC guys on IRC, I will go with the
resolver. It is, in a certain way, a better device (though far more
expensive!)

This is so because if the encoder misses a pulse due to noise, it
eventually recovers the absolute position. Plus they are more
"crap-proof".

i