CNC Nesting Explained
Nesting is how CNC routers, lasers, plasma, and waterjet machines decide where to place each part on a sheet before cutting. Because these machines can plunge and follow any path, nesting has more freedom than saw-based cutting — and usually produces higher material yield.
What nesting means
Nesting is the arrangement of parts — rectangular or irregular — on a sheet so the CNC can cut them all efficiently. The machine follows the toolpaths generated from the nest, cutting interior shapes and outlines that a panel saw could never produce.
Why nesting yields more
Unlike guillotine cutting, nesting is not limited to edge-to-edge cuts. Parts can be tucked into gaps and rotated to any allowed angle, so the packer can fill the sheet more completely. For irregular parts, the advantage is even larger.
Key nesting considerations
- Tool diameter acts as the kerf — leave space between parts.
- Add tabs or holding methods so parts do not shift mid-cut.
- Respect grain on directional sheet goods.
- Order toolpaths to keep the sheet stable as parts are freed.
From nest to toolpath
After nesting, parts are exported — often as DXF — to CAM software that generates toolpaths. CutList Machine produces optimized layouts and DXF exports that feed directly into a CNC workflow, bridging cut-list planning and machine production.
Frequently asked questions
Is nesting only for irregular parts?
No. Nesting works for rectangular parts too and still beats guillotine yield, but its biggest advantage shows with irregular or curved shapes that a saw cannot cut.
What kerf should I use for CNC nesting?
Use the cutting tool diameter as the spacing between parts, since the tool removes a strip equal to its width on every pass.
Put this into practice
Plan tighter layouts and cut less waste with the free CutList Machine optimizer.
Launch the optimizerRelated articles
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EquipmentPanel Saw vs. CNC Router
A practical comparison to help you choose the right machine — and the right layout strategy.
WorkflowHow to Export Cutting Layouts to PDF and DXF
Get your optimized layout off the screen and onto the saw or into your CNC with the right export.