I'm making a box with finger joints and everything is laid out for CAM but i can't seem to select the bottom of the box for a tool path. The other pieces seem to select as one complete path or 2 paths but the bottom is not selectable at all. I've tried different ways or creating the bottom but nothing works. What am I doing wrong???
Can't select a body to CAM
It would be easier to diagnose if you attach the Fusion 360 file to this thread. From the File menu, select Export, then choose 'Archive Files (*.f3d)'. Attach the output to the thread.
Check your CAM setup to make sure all of the bodies are included in the Model section.
ETFrench
You have Red and Yellow warnings in the Timeline. These should always be corrected as soon as they occur as they may lead to problems later. @jeff_strater: This file appears to be really corrupted. When selecting the contour on the 'bottom' component, the sides of the body are being selected instead of the bottom edges.
One workaround to create the toolpaths is to project each body to the same sketch (Do this from the bottom of the bodies). Select these contours in CAM.
ETFrench
Here's a screencast which shows how to create the contour toolpaths using a sketch:
In order to start fresh, I would export this sketch as a dxf, then import it into a new file. Export the top logo sketch as a dxf as well. In order to show the box in its assembled state, make a copy of each of the component (Use Paste, not Paste New in order to keep the copies in sync with the originals). Use rigid joints to assemble the box.
p.s. Use triangular tabs instead of rectangular 
ETFrench
Thanks for posting! I found that the DXF/projected sketch workaround presented by @etfrench worked for me as well with your part. I also found that I experienced the same selection issues both of you described in the original file.
As the original file does contain some timeline errors, I expect that they may have triggered the poor selection. If you see this behavior occur again please let me know and we will look into it - thank you both for bringing it to our attention. I will be on the lookout for similar selection problems!
In the meantime, I found that I could either use the DXF workaround already presented or simply select the sketch geometry instead of the model geometry for the body that has been giving problems. I have also attached a file showing how to use a duplication pattern to make this programming a bit easier - you can go into the contour operation and add tabs wherever you'd like.
I did also notice that reducing the number of tabs around the problem body helped the toolpath generate more consistently - using fewer and maybe larger tabs may make this toolpath a bit easier to work with.
Hopefully that helps! Please let em know if you have any questions.
As @paul.clauss says, use a Pattern in CAM to create the copies. If the plywood face has a distinctive grain, you may want to reorient the pieces to make the most use of it.
Instead of tabs, I use two layers of masking tape with CA glue between them to hold the pieces to the spoil board. It's nice because there is no cleanup needed later. How are you going to clean up the inside round corners left by the router? It might be worthwhile to look at some dovetail or finger joints designed for CNC.
ETFrench
