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.
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