Concave pocket?

[ibryson (Bryson)]

I’m wanting to make this inner circle a concave pocket. This circle is small (22mm diameter). And I’m wanting this concave pocket to be only 2 or 3mm deep at the center then smoothly ramping up and out from there. Is this possible in CC pro?

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

Yes, this can be done, but it requires a bit of math/checking to get the thickness.

Basically, it looks to be the same as a spoon/scoop, for which see:

Spoon Possible without CC Pro?

Of course, doing this in Pro is much more straight-forward: [image] [image] [image]

So one draws the geometry:

Note that the surrounding geometry must be closed so that it may be removed from and modeled in 3D:

Apply | Show 3D

Then select the circle and make appropriate settings:

Apply | Show 3D

To check the depth draw a small piece of geometry:

Then model it to be equal in height to the dimension which you wish to check:

Apply | Show 3D

(then delete/disable the object after)

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

If you want a flat bottom pocket, this also can be done, but it requires some additional geometry:

which previews as:

Then select the middle geometry:

[ibryson (Bryson)]

Thanks! I’ll give this a try tonight. Is there a certain bit I should use for this? Ball mill maybe?

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

Please see:

https://carbide3d.com/hub/courses/create-pro/3d-toolpaths/

You will want to use the largest ball-nose tool available for the interior — the top/sides could probably be cut with a square tool.

Using Fusion 360 is quite a different thing — we have an area on that at:

Fusion 360

(which is where @RichCournoyer 's response was moved to)

but it requires that one is willing to agree to Autodesk’s licensing terms and be willing to do business with them.