I can't say for certain without knowing more about exactly what you have but 
Fanuc of that era should use ordinary encoders, fed directly to the control, 
the control then sends a synthetic analog tacho singnal and analog control 
signals back to the servo amps, which are fairly ordinary DC servo amps and 
motors.

----- Original Message -----
From: "lloyd wilson" <llwilso...@rochester.rr.com>
To: "Emc mail list" <emc-users@lists.sourceforge.net>
Sent: Thursday, January 21, 2016 7:45:48 PM
Subject: [Emc-users] 4 ton project?

I just went to look at a '80s Bridgeport VMC with Heidenhain controller 
and Fanuc yellow cap servos (didn't get inside a cabinet for closer 
investigation - yet). The beast has a tool changer and a bad controller. 
Anyone have experience with that particular configuration? Particularly, 
what servo amps were used and what encoder technology - I remember 
discussions about Fanuc hardware that suggested that specialized 
interface hardware is necessary. What about tool changer technology - I 
assume a PLC process in the LCNC environment would be sufficient to get 
that running.

It's probably just a passing fancy, but oh my it's a temptation.

Thanks

-ldw

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