Hi everybody.

I've recently bought one south bend lathe listed on ebay and I feel again in the middle of an old trouble I used to have when I was trying to retrofit a bridgeport mill with hydraulic tru trace controls. I abandoned that proyect because in that time I didn't figured out how to solve the servo hydraulics in a cheap way.

Now nine years later I'm gonna try a solution like this (see Method and apparatus for controlling hydraulic systems) for the south bend lathe. Maybe using some arduinos for operation of the servo valve, trying to keep the same linear encoders, in case they doesn't work, I will use a syncro pulley-rotary encoder array, because they are cheaper.

If every works fine shure I will resume the hyd mill conversion.

Alfonso.