Hello All! Newbie here trying to create a basic wahoo board. After adding my first new bit to the library, I am not getting the nice and easy dimple to hold the marble on the board. Trying to use a 5/16 radius core box bit to create the dimples but each simulation comes out either looking like a drilled hole using “drill” or has a little peak in the middle if I use contour or pocket.
Can anyone suggest the proper toolpath?
Thank you for the help!
I don’t think CC directly supports those type of bits so the simulation may not be accurate.
Make a test board and experiment with different paths and depths to see that looks good in the real world.
As noted, Carbide Create does not support that tool geometry (flat bottom with radiused corners).
If you dispense with the flat bottom and model the tool as a ball-nosed you will see the rounding which is usually an adequate preview — but be sure to do test cuts to try out feeds and speeds in a piece of scrap.
Usually such tooling is used by hogging out the bulk of the material with a more traditional tool, then using the specialty tool for what is essentially a finishing pass.
I’ve built (and played with) a number of WaHoo boards. The best marble holes that I’ve cut were square sided round ones. Just used a flat ¼" bit to the correct depth. The hole should have a depth that lets the marble sit on the rim of the hole.
Here’s why: The marbles stay in the hole better when they don’t have that “ramp” in the bottom that a rounded bit creates. Sometimes one has to think outside of the traditional construction methods. 
It took my brain a few to process “square sided round ones”. 
Nice. I like this suggestion and will give it a try. Thank you!
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