Re: Limitations of old servos
If the motors are in serviceable condition or just require a little care and new brushes, You could look at modern torque mode drives such as A-M-C, Copley, etc.
These drives no longer use tach feedback as many of the old velocity drives did.
The encoder may be quadrature, not 12/13bit versions.
What controller were you looking at?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.