Hello everyone .
This is my first time posting on the CNCZone Forum .
I am trying to retro fit a Roland MDX-40 into a Mach4 controlled cnc .
I want that the sytem to be closed loop . In order to do that I need to add some encoders to the machine , or to replace the actual stepper motors with some servo motors.
I don't know if someone has experience in doing something like this but I want your opinion on chosing the right electronics for this projects .
Can you suggest me a motion controller board that is compatible with Mach4 and gives the opportunity to connect some encoders , to get a closed loop system with realtime feedback .
The type or interface of the encoders must be 3 channels, single ended or differential.

Your help is highly appreciated .
Thanks in advance