Corners

Corners, also called corner radius, control the shape of each corner on a part.

If you have ever tried to round the corner of a piece of wood by hand, you know it can be a lot of work. Jig or no jig, getting consistent corners takes time. Fortunately, CNC and laser workflows are very good at this kind of thing.

Corner radius is one of those details that often gets skipped in design. Sometimes that is for aesthetic reasons, but often it is because rounding corners manually is just a pain. In GCrafter, it is much easier to experiment.

Corner Controls

Each part has four corner settings:

• Top Left
• Top Right
• Bottom Left
• Bottom Right

Because you are working with a 3D part, it may not always be immediately obvious which corner is which. A top panel, side panel, and front panel all face different directions in 3D space, so their “top left” depends on how that part is viewed in its own 2D plane.

With a little experimenting, it becomes easier to predict.

If a corner changes in a way you did not expect, adjust the value, check the preview, and try the opposite corner if needed.

Positive and Negative Radius

A corner radius can be positive or negative.

These create very different results.

A positive radius rounds the corner.

A negative radius cuts or clips the corner inward, creating a chamfered or notched look.

For example:

Radius: 10mm

creates a rounded corner.

Radius: -10mm

creates a cut-style corner.

Both can be useful depending on the design.

Corners in 3D

Corner radius is applied to the part’s 2D profile, but the result appears in the 3D model and in the exported cut layout.

That means corner changes can affect:

• How the part looks in 3D
• The final outline of the part
• The exported SVG or DXF
• Intersections, depending on the part settings
• The overall feel of the design

Small radius changes can make a box feel softer, more finished, or more furniture-like.

Combining Corners With Edges and Sizing

Corners become especially useful when combined with:

• Part dimensions
• Edge extensions
• Part positioning
• Material thickness
• Custom part shapes

For example, if you enlarge the top panel, extend its edges, and add rounded corners, a simple box can quickly start to look like a small table.

That kind of transformation can happen with just a few number changes.

Practical Uses

Corner radius is useful for:

• Softening sharp corners
• Creating decorative panels
• Rounding tabletops or lids
• Making child-safe edges
• Creating chamfered or clipped designs
• Giving a box a more finished look
• Turning simple panels into furniture-like parts

The Main Idea

Corner radius is a fast way to change the character of a part.

Positive values round corners. Negative values cut corners. Combined with sizing and edge changes, corners can turn a basic box into something much more designed.