Drawing a partial hemisphere as 3D part (Carbide Create Pro/other)

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

as requested on support…

Given the image:

and the dimensions:

There are three possible approaches:

• create in Carbide Create Pro using the 3D tools there
• create in a 3D CAD/modeling tool of some sort, export as an STL, import that into a 3D CAM tool and then prepare toolpaths
• draw things up in profile and assign No Offset Contour toolpaths to the appropriate depths

Making a base for a model

Given a prototype base: [image] How to make it in Carbide Create? First, we have a pixel image with some dimensions: [F-86 base scan with measurements] We import that into Carbide Create: [image] using “Set Background”: [image] and adjust for size: [image] [image] It’s then a matter of drawing and toolpaths and so forth (we will try to do it w/o Create Pro, but will also show that). For reference, there is an overhead view as well: [DSC00036]

Since the latter is well-covered in concept at that lin, we will cover the first two here…

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

The first drawing includes a bit of a base, so we will round up the dimensions to arrive at:

Ok

Draw in the base:

and model that:

Draw the circle for the partial hemisphere:

and Apply and Show 3D:

Select the rectangle and halve it:

and then position it relative to the sphere:

and apply a 3D model to it with appropriate settings:

Apply

Show 3D:

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

Add geometry which describes the area which one wishes to cut:

and then assign a 3D Roughing toolpath:

Note that it is up to the user to source a “long-reach” tool which will allow cutting the model w/o hitting the vertical face. The #201 was selected out of expediency, and should not be used for an actual cut along such a tall feature.

Ok

Then assign a 3D finishing toolpath with a suitable tool — given the design, multiple tools may be necessary, and note that it will not be possible to accurately cut the sharp interior angles without additional setups/toolpaths.

s

(same caveat applies here as regards how tool geometry interacts with part geometry)

which previews as:

Adding an additional 3D Finishing toolpath with a square tool will get one roughly half of the interior angles:

(and using a smaller tool allowed minimizing the other)