Just a quick note to say Hi to everyone on the site.

I'm looking to build by own 3 axis mill/router to general model engineering work, and parts for my other hobby - model rocktry..and therein lies my 1st simple question...

I have seen on the various web sites that cnc mills generally have a fixed milling head and a moving table, whereas routers have a moving milling head.

Do I have this right ? and if so whats the advantage/disadvantage?