How do you go about adding a filet/radius to a non 90 corner?

This is probably quite simple, but I cant seem to find a solid process to achieve it.

How would one go about adding a specified(or just visually acceptable) radius to a corner that is not 90 degrees?

Easiest way is to inset the path, then outset it in Carbide Create (if need be, dupe before-hand and then use Boolean operations to merge)

Alternately, draw in a circle of the appropriate size, use a Boolean operation to trim things, then union in the appropriately placed circle.

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@Lowbrowroyalty As @WillAdams mentioned, if you use the offset tool and select outside, the corners will be rounded. If you want say a 3in hexagon, start with a 2.8in hexagon then offset by 0.2in outside and you will get rounded corners. If you want corners that are more rounded, start with a 2.7in hexagon and offset by 0.3in. You may have to try different settings to get the roundness you desire.


Thank you @luc.onthego and @WillAdams.

I initially tried using the boolean operations and circles, but couldn’t seem to get anything acceptable out of it. I hadn’t considered the offset operation, had no idea that it would provide a radius. Required some diligent note taking on my part to keep final dimensions, but it worked wonderfully and got the job done. I really appreciate this place and the help.

I hadn’t intended to be using this machine for customer projects so soon, if at all. Thought of it as something to learn and have fun with. But I am flooded, and struggling to keep up. Probably a good way to learn though.

Again, thank you very much.


For Boolean operations:

Draw the desired geometry:

Draw a circle of the desired radius:

and draw a tangent line/rectangle off of it:

Then rotate it by half the angle of the point one wishes to round off:

Drag it into alignment:

Select everything, duplicate it, then mirror vertically and drag into registration with the originals:

Delete the duplicate hexagon, then draw in a rectangle which connects with the points of the two rectangles:

Select the twain and Boolean subtract the rectangle from the hexagon:

delete the redundant rectangles and Bolean union the circle and the hexagon:



You are a master. That type of operation certainly was outside of my scope of imagination. Thank you for the excellent explanation. I’ll be putting it into regular practice.

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