Re: [CAD_CAM_EDM_DRO] Resolvers vs Encoders

Hi All:
Can any of you explain to me, the differences between resolvers and
encoders.
What is the implication for machine performance?
Is a retrofit from resolvers to encoders a worthwhile effort?
When did resolvers go out of favour and why?
I'm casting amorously about, for small CNC turning centers, and I've heard
the terms mentioned, especially in regard to Hardinge machines.
Mid eighties machines seem to be the transition point from the resolver
system to the encoder system.
It looks to me like there is a fair amount of very nice old CNC iron from
that era out there available for very little money...certainly far less than
building from scratch or retrofitting a manual machine...especially when you
consider that the enclosures, the coolant pumps, the ballscrews, the way
covers etc, etc are all already there.
Cheers

Marcus