The Complete Guide to Laser Cutting: Beam Physics, Laser Types, Material Science, and DFM Rules That Save You Money

Complete technical guide to laser cutting covering beam physics, CO2 vs Fiber vs Diode lasers, kerf and taper, HAZ thermal science, assist gas dynamics, DFM rules for sheet metal and acrylic, and in-house vs outsourcing cost economics.

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The Complete Guide to Laser Cutting: Beam Physics, Laser Types, Material Science, and DFM Rules That Save You Money

Every engineer who has ever sent a DXF to a fabrication shop has encountered the same frustration: the parts come back, and something is slightly off. A tab doesn't fit. A hole is oval instead of round. The edge finish on 10 mm stainless steel looks nothing like the sample from the 2 mm test piece. The quote comes in higher than expected because the shop had to slow down for your tight internal corners.

Laser cutting looks simple from the outside — point a beam, melt material, done. But the physics governing that beam-matter interaction determines everything: which materials you can cut, how thick, at what speed, with what edge quality, and at what cost. Understanding those physics doesn't just make you a better designer. It directly reduces your per-part cost and eliminates the iterative back-and-forth with fabricators that kills project timelines.

This guide covers the complete picture: the beam physics that dictate material compatibility, the operating principles that separate CO₂ from fiber from diode lasers, the kerf and taper that determine your tolerances, the heat-affected zone that limits your design freedom, assist gas dynamics that control edge quality, the full DFM rulebook, and the economics that determine whether you should own a machine or outsource.

1. The Physics of Laser Cutting: What Happens When Photons Meet Matter

Laser cutting is, at its core, a controlled application of energy density. A laser generates a beam of coherent, monochromatic light — photons all traveling in phase at the same wavelength. That beam is focused through a lens onto a spot typically 50–500 μm in diameter. The power density at that spot is staggering.

1.1 Power Density and the Cutting Threshold

The power density (irradiance) at the focal spot is the fundamental driver:

Where P is laser power (W), and r is the focal spot radius (m). A 4 kW fiber laser focused to a 100 μm spot produces:

That's 51 GW/m² — roughly 50,000 times the intensity of sunlight at Earth's surface. This energy density must exceed the material's threshold for melting and vaporization. Every material has a characteristic threshold fluence (F_{th}, in J/m²) — the minimum energy per unit area required to initiate material removal.

The cutting threshold fluence is:

Where:

The critical insight here: absorptivity A is the wildcard. It varies dramatically by wavelength and material — and it's the physics that determines why fiber lasers dominate metal cutting while CO₂ owns non-metals.

1.2 Absorptivity: Why Wavelength Dictates Material Choice

When photons strike a material surface, three things can happen: reflection, absorption, or transmission. For opaque materials (metals), transmission is zero — the battle is between reflection and absorption.

For metals, absorptivity follows the Drude free-electron model. At room temperature, absorptivity scales with electrical resistivity (\rho_e) and inversely with wavelength (\lambda):

This is why fiber lasers (λ ≈ 1.07 μm) are absorbed 3–7× more efficiently by metals than CO₂ lasers (λ = 10.6 μm). Aluminum, for example, absorbs roughly 5–7% of CO₂ radiation at room temperature but 25–35% of fiber laser radiation. Copper and brass, with their exceptionally low resistivity, are nearly mirrors to CO₂ (absorptivity < 3%) but workable with fiber (absorptivity 5–15%).

Critically, absorptivity is temperature-dependent. As the metal heats up, resistivity increases, and absorptivity rises. Once the surface melts, absorptivity jumps dramatically — often to 60–80% regardless of wavelength. This is why cutting can be initiated: the initial pulse creates a melt pool, and the melt pool absorbs subsequent energy far more efficiently. Fiber lasers reach this "absorptivity runaway" threshold faster because their shorter wavelength starts from a higher baseline.

For non-metals (polymers, wood, acrylic, glass), the physics is completely different. Absorption is dominated by molecular vibration modes (phonon coupling), not free-electron behavior. CO₂'s 10.6 μm wavelength happens to align closely with the C–O and C–C bond vibration frequencies in most organic materials — making it nearly perfectly absorbed. Acrylic (PMMA) absorbs >95% of CO₂ laser radiation. Fiber lasers, by contrast, pass through clear acrylic largely unabsorbed.

This wavelength-material coupling is the single most important factor in laser selection:

Material · CO₂ (10.6 μm) Absorptivity · Fiber (1.07 μm) Absorptivity · Winner

Mild Steel · ~12% · ~35% · Fiber

Stainless Steel · ~12% · ~35% · Fiber

Aluminum · ~5% · ~25% · Fiber

Copper · ~2% · ~8% · Fiber

Acrylic · >95% · <5% · CO₂

Wood/Plywood · >90% · ~20% · CO₂

Polycarbonate · ~90% · ~15% · CO₂

1.3 The Three Cutting Modes

Once the beam is absorbed, three distinct physical mechanisms can separate material, and the choice of mode determines edge quality, speed, and HAZ:

Vaporization Cutting: The beam heats material past its boiling point directly. Material transitions from solid → liquid → vapor almost instantaneously. This produces the narrowest kerf and the cleanest edges but requires enormous power density (>10¹⁰ W/m²) and is only practical for thin materials. The vapor plume carries away nearly all the energy, so there's minimal heat conduction into the bulk.

Fusion Cutting (Melt-and-Blow): The beam melts the material, and a high-pressure inert assist gas (typically nitrogen at 10–25 bar) blows the molten material out through the bottom of the kerf. This is the dominant industrial mode for metals. The assist gas does no chemical work — it's purely mechanical. Edge quality is excellent (oxide-free), but cutting speed is limited by melt ejection dynamics.

Reactive/Flame Cutting: An oxygen assist gas jet creates an exothermic oxidation reaction at the cut front:

This reaction supplies 40–60% of the total cutting energy, dramatically increasing cutting speed on mild steel — often 2–3× faster than fusion cutting at the same power. The tradeoff: the cut edge is oxidized (dark, rough) and may require secondary cleaning before welding or painting.

2. Laser Types: CO₂ vs Fiber vs Nd:YAG vs Diode

Four laser architectures dominate the market. Each has a distinct wavelength, efficiency, maintenance profile, and sweet spot.

2.1 CO₂ Lasers (λ = 10.6 μm)

CO₂ lasers use an electrically excited gas mixture (CO₂, N₂, He) in a sealed or flowing-gas tube. The lasing medium is molecular CO₂, with nitrogen acting as an energy transfer agent and helium as a thermal buffer.

Best for: Acrylic, wood, leather, textiles, paper, thin plastics, glass/ceramic engraving. Can cut thin steel (≤20 mm) but at higher operating cost than fiber.

Avoid: Reflective metals (copper, brass, aluminum above 3 mm). The high reflectivity at 10.6 μm can cause back-reflections that damage the laser optics — a phenomenon called "back-reflection burnout."

2.2 Fiber Lasers (λ = 1.07 μm)

Fiber lasers use rare-earth-doped optical fiber (ytterbium, typically) pumped by diode lasers. The doped fiber itself is the gain medium — a completely solid-state architecture with no mirrors, no gas, no alignment.

Best for: All metals — mild steel, stainless, aluminum, copper, brass, titanium. The short wavelength and high absorptivity make fiber the default choice for industrial metal cutting from 0.5 mm foil to 30 mm plate.

Limitations: Cannot cut clear acrylic or most organic transparent materials. The 1.07 μm beam passes through with minimal absorption.

2.3 Nd:YAG Lasers (λ = 1.064 μm)

Neodymium-doped yttrium aluminum garnet lasers are the predecessor to fiber. They share essentially the same wavelength as fiber lasers (1.064 μm vs 1.07 μm) — close enough that material absorptivity is nearly identical.

Modern role: Nd:YAG has been largely displaced by fiber lasers for general cutting. It survives in niche applications requiring high peak power pulses for drilling and ablation of difficult materials (ceramics, diamond, superalloys).

2.4 Diode Lasers (λ = 445–980 nm)

Semiconductor laser diodes directly convert electrical current to light. Modern multi-emitter diode stacks can reach powers of 1–6 kW for cutting.

Limitations: The large, asymmetric focal spot (typically 100–300 μm × 200–500 μm) produces a wide kerf and rough edge on anything beyond 3 mm. Not competitive with fiber for industrial metal cutting.

Laser Type Decision Matrix

graph TD
    A[What material are you cutting?] --> B{Metal?}
    B -->|Yes| C{Thickness?}
    C -->|0.5 - 30 mm| D[Fiber Laser ⭐<br/>Best speed, lowest operating cost,<br/>handles reflective metals]
    C -->|< 0.5 mm fine features| E[Nd:YAG Pulsed<br/>Or Fiber with pulse capability]
    C -->|> 30 mm| F[Plasma or waterjet<br/>Laser becomes uneconomical]
    B -->|No| G{Type of non-metal?}
    G -->|Acrylic, Wood, Leather,<br/>Paper, Textiles| H[CO2 Laser ⭐<br/>Near-perfect absorption at 10.6 μm]
    G -->|Thin plastics < 3mm| I[CO2 or Diode<br/>Diode is cheaper, CO2 is cleaner]
    G -->|Glass, Stone, Ceramic| J[CO2 for engraving<br/>Not for cutting - thermal stress<br/>will shatter the workpiece]
    G -->|Polycarbonate| K[⚠️ AVOID ALL LASERS<br/>PC produces toxic fumes,<br/>chars badly, catches fire]

3. The Kerf: Understanding Cut Width and Taper

3.1 Kerf Width Physics

The kerf is the void left behind by the cutting process — the physical gap created where material was removed. Kerf width is always larger than the focal spot diameter because of beam divergence, thermal conduction, and melt ejection dynamics.

The minimum theoretical kerf width is roughly:

Where:

In practice, kerf width for industrial systems ranges from:

Material & Thickness · Typical Kerf Width

1 mm stainless (fiber) · 0.08–0.15 mm

3 mm mild steel (fiber) · 0.15–0.25 mm

10 mm mild steel (fiber) · 0.30–0.50 mm

20 mm mild steel (fiber) · 0.50–0.80 mm

3 mm acrylic (CO₂) · 0.10–0.20 mm

10 mm acrylic (CO₂) · 0.20–0.35 mm

3.2 Taper: The Angle Nobody Talks About

In an ideal world, the laser cut face would be perfectly perpendicular to the sheet surface. In reality, every laser cut has some degree of taper — the kerf is wider at the top (beam entry) than at the bottom (beam exit). This happens because:

  1. Beam divergence: Even a perfectly collimated beam diverges slightly after the focal point (Rayleigh range effects)
  2. Energy absorption gradient: The beam loses energy as it traverses the kerf depth, reducing cutting power at the bottom
  3. Assist gas pressure drop: Gas pressure at the bottom of a deep kerf is lower than at the nozzle, reducing melt ejection efficiency

Taper is measured as the angle between the cut face and the vertical:

For thin sheets (<3 mm), taper is negligible — typically <1°. For thick plate (>15 mm), taper can reach 2–4° and becomes a design constraint. A 15 mm plate with 3° taper means the bottom edge is offset by ~0.8 mm from the top edge on each side.

Taper mitigation strategies:

4. The Heat-Affected Zone (HAZ)

Every laser cut has a heat-affected zone — a thin layer of material adjacent to the cut edge that has been thermally altered but not melted. The HAZ matters because:

4.1 HAZ Thermal Physics

The HAZ thickness is governed by the thermal diffusion length:

Where:

For a beam moving at cutting speed v with spot diameter d:

This gives us the key design lever:

To minimize HAZ: increase cutting speed and/or reduce spot size. Doubling the cutting speed reduces HAZ thickness by ~30% (1/\sqrt{2}). This is why fiber lasers, which cut steel 2–4× faster than CO₂, produce thinner HAZs on equivalent materials.

4.2 Typical HAZ Values

Material · Typical HAZ Thickness · Notes

Mild steel (fiber, 6 mm) · 50–150 μm · Acceptable for most applications

Stainless 304 (fiber, 6 mm) · 30–100 μm · Narrower than mild steel due to lower thermal conductivity

Aluminum 6061 (fiber, 3 mm) · 100–300 μm · High thermal diffusivity spreads heat rapidly

Titanium Ti-6Al-4V (fiber, 3 mm) · 50–120 μm · Low thermal conductivity limits HAZ spread

Acrylic (CO₂, 6 mm) · 20–50 μm · Low thermal diffusivity + vaporization mode = minimal HAZ

4.3 HAZ Management for Critical Applications

For aerospace, medical, and structural applications where HAZ must be minimized:

  1. Maximize cutting speed — push to the machine's limit for the given material/thickness
  2. Use nitrogen assist gas — prevents exothermic oxidation that adds heat to the cut zone
  3. High-pressure assist gas (>15 bar) — improves convective cooling at the cut front
  4. Pulsed cutting mode — for thin materials, nanosecond or microsecond pulsing allows heat dissipation between pulses
  5. Post-cut stress relief — for critical structural parts in thick material, a post-cut heat treatment normalizes the HAZ microstructure

5. Assist Gas Dynamics

The assist gas jet does two things: it ejects molten material from the kerf, and (with oxygen) it contributes chemical energy. Gas selection and pressure are not arbitrary — they directly control edge quality, cutting speed, and operating cost.

5.1 Gas Types and Their Roles

Oxygen (O₂) — Reactive cutting mode:

Nitrogen (N₂) — Inert fusion cutting:

Compressed Air — Budget compromise:

5.2 Gas Flow Dynamics

The assist gas exits the nozzle at high velocity, forming a supersonic jet. The gas must penetrate the kerf and eject molten material from the bottom. The key parameters:

Nozzle standoff: 0.5–2.0 mm from workpiece surface. Too high and the jet loses momentum before reaching the kerf. Too low and the nozzle risks collision with the workpiece or molten splash-back.

Nozzle diameter: 1.0–3.0 mm for cutting. Larger diameter = higher gas flow = higher gas cost but better melt ejection on thick material.

Gas pressure at the kerf entrance is lower than the supply pressure due to aerodynamic losses. For a 2 mm nozzle at 15 bar supply pressure cutting 10 mm steel, the pressure at kerf bottom can drop to 3–5 bar. On thick sections (>20 mm), this pressure drop becomes the limiting factor — the gas can no longer effectively eject melt, and cutting fails even if laser power is sufficient.

6. Complete DFM Rules for Laser Cutting

These rules come from material physics, machine kinematics, and industrial best practices. Apply them before you submit your DXF, and your parts will be cheaper, faster, and more accurate.

6.1 Minimum Hole Diameter

A hole smaller than the material thickness cannot be cut cleanly. The initial pierce point disrupts material before the beam begins its circular path, and the molten material has no clean exit.

Rule: d_{hole} \ge t_{material} (best practice), d_{hole} \ge 0.5 \cdot t_{material} (absolute minimum)

Material Thickness · Recommended Min Hole · Bare Minimum

1 mm · 1.0 mm · 0.5 mm

3 mm · 3.0 mm · 1.5 mm

6 mm · 6.0 mm · 3.0 mm

10 mm · 10.0 mm · 5.0 mm

20 mm · 20.0 mm · 10.0 mm

For holes smaller than the thickness, consider drilling as a secondary operation, or redesign to use larger holes.

6.2 Minimum Wall Thickness / Web Width

The material between two cut features (holes, slots, edges) must withstand the thermal stress of cutting without deforming. A web that's too thin will warp, melt, or break during cutting.

Rule: w_{web} \ge t_{material} (best practice), w_{web} \ge 0.8 \cdot t_{material} (minimum)

For materials prone to thermal warping (thin aluminum, stainless steel), increase to 1.5 \cdot t_{material}.

6.3 Internal Corner Radii

Laser cutting machines are CNC motion systems with mass, inertia, and acceleration limits. Sharp internal corners require the cutting head to come to a complete stop, change direction, and re-accelerate — which overheats the corner and creates a burn mark.

Rule: r_{corner} \ge 0.5 \cdot t_{material} (recommended), r_{corner} \ge 0.2 \text{ mm} (absolute minimum)

The physics: when the head decelerates for a sharp corner, the beam dwells at that point longer, depositing excess energy. The excess energy creates a "burn mark" — a wider kerf and rougher edge at the corner. Larger radii let the head maintain speed through the corner, reducing dwell time.

For cosmetic or tight-tolerance parts, use the largest practical radius. A 3 mm radius instead of 0.5 mm on a 6 mm steel part reduces corner burn and can improve cutting speed by 10–20% by avoiding deceleration cycles.

6.4 Slot Width

Slots (elongated holes) follow the same rule as holes but with an additional length constraint:

Rule: w_{slot} \ge t_{material} (width), l_{slot} \le 10 \cdot w_{slot} (if the slot is too long and narrow, the middle section can warp from asymmetric thermal stress)

6.5 Tab and Slot Joints — Accounting for Kerf

When designing interlocking assemblies (tab A fits into slot B), the kerf must be considered — otherwise your parts won't fit.

For a tab that must fit snugly into a slot:

In practice, for a 3 mm acrylic assembly with 0.15 mm kerf:

For a sliding fit, add an additional 0.1–0.2 mm clearance beyond the kerf offset.

6.6 Nesting and Part Spacing

Parts on the sheet must be spaced to prevent thermal interaction. If two cuts are too close, the material web between them overheats and deforms.

Rule: s_{part} \ge t_{material} for steel, s_{part} \ge 2 \cdot t_{material} for aluminum (higher thermal conductivity)

Minimum absolute spacing: 2–3 mm for thin materials (<3 mm), 5–10 mm for thick materials (>10 mm).

6.7 Feature-to-Edge Distance

Features (holes, slots) too close to the part edge risk blowing out the thin web during cutting.

Rule: d_{edge} \ge t_{material} (minimum), d_{edge} \ge 2 \cdot t_{material} (recommended)

6.8 Avoiding Enclosed Volumes in Your Design

Tubing, box sections, and enclosed channels can't be laser cut from a single flat sheet — the laser head needs line-of-sight access to the material. If your design includes enclosed features, break them into flat components with tab-and-slot assembly.

6.9 Maximum Thickness by Laser Type

Beyond certain thicknesses, laser cutting becomes impractical — the kerf is too wide, the edge too rough, the speed too slow, and the cost too high relative to plasma, waterjet, or machining.

Material · Fiber Laser Max · CO₂ Laser Max

Mild Steel · 25–30 mm · 20–25 mm

Stainless Steel · 20–25 mm · 15–20 mm

Aluminum · 12–15 mm · 6–8 mm

Copper/Brass · 8–10 mm · Not recommended

Acrylic · Not practical · 25–30 mm

Wood/Plywood · Not practical · 20–25 mm

7. Cost Economics: In-House vs Outsourcing

7.1 Operating Cost Comparison: Fiber vs CO₂

For a 4 kW system running 2,000 hours/year (one shift):

Cost Item · 4 kW CO₂ · 4 kW Fiber · Fiber Advantage

Electricity (0.10/kWh) · 8,800/yr · $3,200/yr · −64%

Laser gas (CO₂, N₂, He) · 3,000/yr · 0 · −100%

Optics (mirrors, lenses) · 2,000/yr · 200/yr · −90%

Laser tube rebuild · 1,600/yr (amortized) · 0 · −100%

Chiller maintenance · 800/yr · 600/yr · −25%

Total operating cost/hr · 8.10/hr · 2.00/hr · −75%

Source: Adapted from FSMdirect operating cost analysis [1], normalized to 4 kW systems.

However, the capital cost story is different. A new 4 kW CO₂ laser cutter runs 150,000–250,000. A 4 kW fiber laser runs 200,000–400,000. The payback period on the fiber premium depends on utilization: at 2,000 hours/year, the fiber saves ~12,200/year in operating costs, giving a payback of 4–8 years on the 50,000–$150,000 premium.

7.2 The Outsourcing Case

For most engineering teams, owning a laser cutter doesn't make financial sense below ~1,000 hours/year of cutting. Below that threshold, the capital is better deployed elsewhere, and the expertise required to operate and maintain the machine is non-trivial.

The effective hourly rate for outsourced laser cutting (including machine amortization, labor, overhead, and profit margin) ranges from:

These rates may seem high, but they include nesting optimization, material sourcing, quality inspection, and the operator's expertise in parameter optimization.

The rule of thumb: If your annual laser cutting spend is below 80,000–120,000, outsourcing via a platform like FabFlow (where you can compare quotes from multiple laser cutting shops) almost always beats owning a machine. Above that threshold, run the numbers with your actual part mix and utilization.

7.3 The Hidden Cost of Parameters

A shop that dials in its parameters properly (power, speed, gas pressure, focal position, pierce time) for your specific material and thickness produces better parts faster — and cheaper — than one that uses generic settings. The difference can be 30–50% in cutting time and 2–3× in edge quality. This is one of the subtle reasons why established fabrication shops with deep process knowledge consistently outperform newer entrants on price and quality simultaneously.

8. Practical Getting-Started Guide

8.1 Specifying a Laser Cutting Job

When you submit a DXF or DWG to a laser cutting shop, include:

  1. Material grade and thickness (not just "steel" — "AISI 304 stainless, 3.0 mm, 2B finish")
  2. Quantity (affects nesting strategy and pricing)
  3. Critical tolerances (specify which dimensions matter; don't tolerance everything)
  4. Edge quality requirements (oxide-free for welding? Cosmetic face? Deburred?)
  5. Grain direction if applicable (for parts that will be bent)
  6. Threaded/tapped hole callouts as secondary operations (laser can't tap)
  7. Finishing requirements (powder coat, anodize, passivation)

8.2 Preparing Your DXF for Laser Cutting

8.3 Red Flags in Your Design (Pre-Submission Checklist)

Before sending your file, check for:

9. Where Laser Cutting Fits in the Digital Manufacturing Stack

Laser cutting occupies a unique position: it's fast, it's precise, it handles the widest range of sheet materials, and it's the most cost-effective process for 2D profiles in sheet and plate. But it's not a universal tool.

When laser cutting wins:

When to consider alternatives:

10. Conclusion

Laser cutting rewards designers who understand its physics. The beam-matter interaction isn't just academic — it's the difference between a part that costs ₹300 and one that costs ₹900, between an edge you can weld without prep and one that needs 20 minutes of grinding, between a hole that's round and one that's an oval with a burn mark.

The key takeaways:

  1. Wavelength drives material compatibility. Fiber (1.07 μm) for metals. CO₂ (10.6 μm) for non-metals. This is not a preference — it's physics, encoded in the absorptivity equation.
  2. Kerf and taper are real. Your slot won't fit your tab unless you account for the 0.1–0.5 mm of material removed during cutting.
  3. HAZ is controlled by speed. Faster cutting = less time for heat to diffuse = thinner HAZ. Push the machine to its speed limit for critical parts.
  4. Assist gas is a design choice. Oxygen gives speed (exothermic boost) but oxidized edges. Nitrogen gives clean, weld-ready edges. Compressed air is the budget compromise.
  5. DFM rules exist because physics doesn't negotiate. Minimum hole size ≥ material thickness. Corner radii ≥ 0.5× material thickness. Web width ≥ material thickness. These are not suggestions.
  6. The economics tilt toward fiber for anyone cutting more than 1,000 hours/year of metal. Below that, outsourcing through a platform like FabFlow is almost certainly the better financial decision.

Laser cutting is a mature, reliable, and extraordinarily capable process. The machines are smarter than ever, the beam sources last 100,000+ hours, and the software makes nesting and parameter optimization nearly automatic. But the physics hasn't changed since the first industrial CO₂ laser cut a sheet of steel in 1967. Understand that physics, follow the DFM rules, and your parts will come back right the first time — on time, on spec, and on budget.

References

  1. FSM Direct, "CO2 Versus Fiber Laser: Cost to Cut a Part," 2014. https://fsmdirect.com/co2-versus-fiber-laser-cost-to-cut-a-part/
  2. Komaspec, "5 Key Design Tips for Laser Cutting DFM," 2020. https://www.komaspec.com/about-us/blog/5-key-design-tips-for-laser-cutting-dfm/
  3. RapidDirect, "What Is Laser Cutting? Process, Materials, and Design Guide," 2026. https://www.rapiddirect.com/blog/what-is-laser-cutting/
  4. Fraunhofer IWS, "Latest Developments of Laser Cutting," 2010. https://publica.fraunhofer.de/
  5. Riveiro, A., et al., "Laser Cutting: A Review on the Influence of Assist Gas," Materials, 2019. https://pmc.ncbi.nlm.nih.gov/articles/PMC6337310/
  6. Ghany, K.A., & Newishy, M., "High‐Power Laser Cutting of Steel Plates: Heat Affected Zone Analysis," Advances in Materials Science and Engineering, 2016. https://onlinelibrary.wiley.com/doi/10.1155/2016/1242565
  7. Fictiv, "Laser Cutting Precision Metal Fabrication," 2024. https://www.fictiv.com/articles/laser-cutting-precision-metal-fabrication
  8. Acctek Group, "Understanding The Operating Costs of Laser Cutting Machines," 2024. https://www.acctekgroup.com/understanding-the-operating-costs-of-laser-cutting-machines/

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