You need to make sure you are using a profile machining operation ( select shapes then Machining - Profile, or use the brown toolbar icon with two concentric circles).
There is an InsideOutside parameter in the profile.
The other important piece of information is the ToolDiameter. (You don't need to worry about the tool number unless you are doing tool changes).
The profile will then create a toolpath offset from the geometry by the tool radius.
Here is tutorial that gives an introduction to profiles:
http://www.cambam.info/doc/plus/tutorials/Profile.aspx
Another useful option...click on the Machining folder in the tree on the left, then toward the bottom of the property list is a setting 'ShowCutWidths'. If you set this to true, the area to be cut will be shaded, so you can see at a glance if you are going to undercut or overcut anything.
Originally Posted by Crawler374  Thanks 10bulls! I got it working 
instead of another thread, can you tell me how or if, i can mill the inside or outside of a CAM line? instead of milling the center of the line?
say i make a 2" x 2" square in cam bam and want to cut the wood so the outside of the square will be 2". instead of 1 3/4" with a 1/4 router bit. |