Just registered MeshCAM so am running into what are probably dumb questions. Here's my 1st of those:

As an example if I'm trying to route a channel in a 2x4 (and only the channel)and then use the trial version of Cutviewer to see the toolpaths, it does route the channel I've created in the stl file, but then the G code sends the tool all over the top surface of the board as if it is surfacing it What if I just want to cut the channel?

I tried to attach example stl files and the G code file, but the website said they were invalid file types.
Thanks

Mike