Rounded corners on existing square design

[WillAdams (William Adams (Carbide 3D))]

Yes. @Julien’s technique works.

Alternately, cut notch, then add a circle.

I believe if you’ll go through this tutorial:

Let's make a coaster

The prototypical first job for a Shapeoko is to cut a coaster — here we do this using Carbide Create, trying to make the job as simple as possible, but adding a bit of interest with an inlay, and increasing the utility of the object by rounding off the corners. Before any real setup it will be best to go into Job Setup and Clear the drawing, and set the measurement units — please use mm (metric) for this tutorial. Note that the feeds and speeds in the Carbide 3D charts are given in Imperial inc…

Should get you to an understanding of the concepts involved. See Shapeoko CNC Router, Rigid, Accurate, Reliable, and Affordable for further reference information.

If not, let me know and we’ll work up something more specific.