Гилотинен vs Свободен Рез: Какво Може (и Не Може) Вашият Циркуляр

A guillotine cut runs straight from one edge of the sheet to the other — dividing the panel into two pieces with a single pass. A free cut can start and stop anywhere, at any angle. The cutting method your equipment supports directly determines which optimization approach you should use and how much material you can save. Understanding the distinction between these two approaches is essential for anyone working with sheet goods, whether you're building kitchen cabinets from melamine or cutting plywood panels for a built-in bookcase.

What Is a Guillotine Cut?

A guillotine cut is any straight cut that travels from one edge of a panel all the way through to the opposite edge. The name comes from the paper guillotine — the lever-operated cutter you'll find in print shops — which works on exactly the same principle: a blade descends and slices the entire width of the material in one motion.

The defining rule of guillotine cutting is simple: every cut must go edge to edge. You cannot stop a cut partway through a sheet and change direction. Each cut divides one rectangular piece into exactly two smaller rectangular pieces. There is no way around this constraint — it is a physical limitation of how straight-blade saws operate.

This is how virtually all common workshop saws function. A table saw pushes the sheet through a fixed blade, and the cut naturally runs the full length of the panel. A panel saw (vertical or horizontal) clamps the sheet and drives the blade from one edge to the other. A track saw or circular saw with a guide rail rides along a straight track, cutting from edge to edge. In every case, the result is a guillotine cut.

The vast majority of workshop cutting — from hobbyist garages to professional cabinet shops — is guillotine-based. If you use any type of straight saw, your cutting diagrams must respect this constraint, or you'll end up with layouts that look great on screen but are impossible to execute at the saw.

What Is a Free Cut?

A free cut removes the edge-to-edge constraint entirely. Cuts can start and stop at any point on the sheet. Parts can be placed at any position and at any angle — they don't need to align with a grid or follow a rectangular subdivision pattern. The only requirement is that the parts fit within the sheet boundaries without overlapping.

Free cutting is sometimes called nesting, particularly in industrial contexts where irregular shapes are packed together for maximum material yield. Think of it like solving a jigsaw puzzle in reverse: you're arranging oddly shaped pieces as tightly as possible on a flat surface, then cutting around each one individually.

To execute free cuts in practice, you need equipment that can follow arbitrary paths. A CNC router is the most common tool — its computer-controlled spindle can trace any contour, cutting parts out one by one regardless of their position or orientation on the sheet. A laser cutter or waterjet can do the same. In theory, you could also make free cuts with a jigsaw, but the accuracy and effort required make this impractical for anything beyond occasional use.

For a deeper comparison of CNC and manual approaches, see our guide on CNC nesting vs manual cut list optimization.

How Each Method Affects Your Layouts

The visual difference between guillotine and free-cut layouts is immediately obvious. A guillotine layout looks like a structured grid — the sheet is subdivided into progressively smaller rectangles, much like cutting a cake into rows and then slicing each row into portions. Every boundary line runs the full width or height of the section it divides. The result is orderly, predictable, and easy to follow on the shop floor.

A free-cut layout looks more like a tightly packed puzzle. Parts are nestled against each other with minimal gaps, rotated to fill irregular spaces, and positioned wherever the algorithm finds the best fit. There are no through-lines running from edge to edge — each piece is simply placed in the most efficient available spot.

This difference in packing flexibility has a direct impact on material yield. Guillotine cutting constraints typically produce yields between 75% and 90% — meaning 10% to 25% of each sheet becomes waste. Free cutting, because it can pack parts more tightly, typically achieves yields between 85% and 95%.

That 5-15% difference sounds significant, and on large production runs it genuinely is. If you're cutting 10 full sheets of 18mm melamine at $50 per sheet, the yield difference might save you $25 to $75 in material. Scale that to hundreds of sheets and the savings become substantial. But for smaller projects — under five sheets — the difference is often negligible, and the speed and simplicity of guillotine cutting more than compensates.

Don't forget that saw kerf also plays a role here. Every cut removes a strip of material equal to the blade width, and guillotine cuts tend to be longer (edge to edge), which means slightly more kerf waste per cut compared to the shorter, targeted cuts a CNC router makes.

Which Should You Choose?

The answer depends almost entirely on your equipment:

• Use guillotine cutting if you work with a table saw, track saw, panel saw, or circular saw. These tools physically cannot make free cuts, so your optimization software must generate layouts that respect the edge-to-edge constraint. This applies to the vast majority of woodworkers, cabinet makers, and DIY builders.
• Use free cutting if you have access to a CNC router, laser cutter, or a CNC cutting service. Free-cut nesting will squeeze more parts from each sheet, which matters when material costs are high or production volumes are large.

If you're unsure, start with guillotine. The layouts are easier to execute, easier to verify by eye, and compatible with every straight-cutting tool. You can always switch to free-cut nesting later if you upgrade to CNC equipment.

CutPlan generates guillotine-compatible layouts by default, ensuring every cut on the diagram is physically achievable with a standard table saw or panel saw. This is a deliberate design choice — we optimize for real-world workshop conditions, not theoretical maximums that require equipment most users don't have. To explore all the ways the optimizer helps you save material, visit our features page.

Multi-Level Guillotine Cuts

Not all guillotine layouts are created equal. The concept of cut levels determines how deeply the optimizer can subdivide each sheet, and this has a significant impact on yield.

Here's how it works:

• Level 1: The first cut divides the full sheet into two sections — for example, a left half and a right half.
• Level 2: Each of those two sections is divided again, creating four regions. These second-level cuts run perpendicular to the first.
• Level 3: Each of the four regions is subdivided once more, producing up to eight zones. The direction alternates again.
• Level 4 and beyond: The pattern continues, with each level offering more granular placement options.

Most cut list optimizers support 3 to 4 levels of guillotine subdivision. More levels mean more flexibility in part placement, which generally translates to better yield — but also a more complex cutting sequence. A 2-level layout might waste 20% of the sheet but require only 6 cuts. A 4-level layout might reduce waste to 12% but require 15 cuts in a specific order.

The trade-off is between efficiency and complexity. For small projects, 2-3 levels is usually sufficient. For larger jobs with many different part sizes, 4 levels can meaningfully reduce the number of sheets you need to buy. For a comprehensive look at how all these factors work together, see our complete guide to cut list optimization.

Често Задавани Въпроси

Мога ли да правя свободни резове с циркуляр?

На практика не. Циркулярите правят резове от ръб до ръб. За свободни резове ви е нужен CNC фрезер.

Кой метод губи по-малко материал?

Свободният рез обикновено дава 5-15% по-малко отпадък. Но за малки проекти разликата е минимална.

CutPlan поддържа ли и двата метода?

CutPlan генерира по подразбиране схеми, съвместими с гилотинен рез, които работят с всеки циркуляр или панелен циркуляр.