We just purchased a new Romi C420 Lathe. It came with the optional external M code interface. We are trying to wire in a solenoid to control the open and close of a traveling steady rest. On our other machines we just wired it into the coolant system, so if the coolant was on then the steady rest would be also. We would like to be able to use this external interface this time though. Has anyone had any experience with using these. What we don't know is what plugs to use and what M code will be used in the program to open and to close.

Thank You,