What is sheet nesting?

Sheet nesting is the process of arranging smaller 2D shapes (parts) onto a larger 2D sheet to minimize material waste.

Should I cut the biggest pieces first?

Yes, mathematically it is almost always better to place the largest pieces first and fit smaller pieces into the remaining gaps.

How much gap should I leave between parts?

You must leave a gap equal to your blade thickness (kerf), typically 3mm to 5mm for woodworking, or wider for CNC routing.

Can parts be rotated?

Parts can be rotated 90 degrees to fit better, unless the material has a specific grain direction (like wood veneer) that must be maintained.

Is manual arrangement ever better than software?

Rarely. While a human might find a 'neat' arrangement, an algorithm tests thousands of possibilities per second to find the mathematically optimal fit.

How to Arrange Parts on Sheets — Visual Guide to Optimal Nesting

Understanding how parts interlock on standard sheets is the key to reducing material waste. Learn the fundamental rules of 2D nesting to improve your workshop's yield.

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The Basics of Sheet Nesting

At its core, arranging parts on sheets is a mathematical problem known as "2D bin packing." You are trying to fit as many smaller rectangles (the parts) as possible onto a larger rectangle (the stock sheet) with the least amount of empty space (waste) remaining, which helps reduce sheet material waste.

4 Rules for Manual Arrangement

Rule 1: Largest Pieces First. Always position your biggest panels first. It is much easier to squeeze a 300x200mm drawer front into a leftover corner than it is to find room for a 2000x600mm cabinet side later.
Rule 2: Align to Edges. Push pieces tightly into corners and align them along the longest edges of the sheet. This creates long, continuous offcuts rather than fragmented scrap.
Rule 3: Consider Rotation. Unless you are working with grain-matched wood veneer, allow parts to rotate 90 degrees. A piece that doesn't fit horizontally might slide perfectly in vertically.
Rule 4: Account for Blade Kerf. Remember that lines on a page don't have thickness, but a saw blade does. You must leave space (usually 3-5mm) between every single part.

Visual Example: Impact of Layout

Let's look at 8 pieces arranged on a standard 2440×1220 sheet. How you place them drastically changes the amount of usable material you save.

Poor Layout

35% Waste

Good Layout

18% Waste

Optimal Layout

7% Waste

The optimal layout packs items tightly to one corner, leaving a massive, highly usable continuous offcut block at the bottom.

Why Software Beats Manual Arrangement

Humans are pattern-seekers. We like to line things up symmetrically. But math doesn't care about symmetry. A sheet cutting optimizer like CutWize tests thousands of asymmetrical, unintuitive arrangements per second to find the one layout that mathematically yields the lowest waste percentage.

Don't waste an hour playing Tetris on a whiteboard. Use an automated optimizer and get cutting instantly.

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