CNC Tracer and Digitise Attachment

I am wondering if it is possible [not that I could do it] to make or
purchase a Tracer and/or Digitiseing attachment? I figure alot of
stuff is allready in in the controls but can it be used without
having to add lots more? Where I worked had an Aceaira that could
digitise but I don't remember what brand of controls it had, and
don't remember if it could trace.Seb.