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Atomstack · Diode
AtomStack A70 Max
70–77W CoS-packaged diode: 850×800 mm flagship Atomstack cutter
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Last updated How we evaluate
Released November 2024
TL;DR
AtomStack A70 Max brings 70–77W compressed diode power to an 850×800 mm frame with auto-focus, touchscreen, and claims of 25 mm wood in one pass. Popular 2024–2025 upgrade path for makers outgrowing A40 Pro: still open-frame, not enclosed.
Best for
What makes this machine stand out
Hardware and workflow features worth understanding before you buy : not just wattage on a label.
Autofocus / height sensing (Z-style)
The machine measures material height (autofocus, LiDAR, or probe-style sensing) so the lens sits at the right distance before the job starts : you are not dialing focus by hand on every new thickness. Huge time saver on mixed scrap, warped boards, and CO₂ beds with varying acrylic sheets.
Open-frame : plan safety first
There is no factory enclosure: you wear OD-rated glasses, control smoke, and keep kids/pets away. You trade cabinet convenience for price and access : fine in a dedicated workshop, stressful in a living room without a plan.
LightBurn compatible
LightBurn support means advanced layers, camera tools, and workflows many makers outgrow the stock app with. Confirm your exact controller board before assuming full features : some machines need a paid license separately.
Our verdict
Ideal if you
AtomStack A70 Max 70W targets mixed engraving and wood-cutting weeks: fewer passes on basswood and dark acrylic than weaker SKUs in the same line.
Skip if you
Wrong pick if you never engrave and only wanted the lowest price. Ultra-fine photo work can look better on an engraving-first SKU. Open-frame: safety and smoke are on you.
Pros
- Strongest cut headroom in the line: about 28 mm basswood-class stock in benchmarks
- 70W: the most cut-focused head in the AtomStack A70 Max line
- Open-frame: plan laser glasses, exhaust, and workspace rules from day one
Cons
- Clear cast acrylic and thick production cutting still favor CO₂, not diode power alone
- Confirm optical wattage on the listing before you buy
What this machine is for
Maximum Atomstack diode power for large panels and deep wood cuts
Large-format high-power diode for production-style wood and acrylic cutting plus detailed engraving.
Laser spot size
0.12 × 0.18 mm (70W) / 0.08 × 0.12 mm (35W)
Motion precision: 0.01 mm
Sample engrave job
~5–8 min
10 × 10 cm (4 × 4 in)
Sample cut job
~2–4 min
10 × 10 cm (4 × 4 in)
Reference benchmark: same job size on every machine so you can compare times fairly. Times are estimates for the reference job above; your design complexity and settings will change them.
Materials
- · Wood
- · Leather
- · 304 stainless (mirror, settings-dependent)
- · Glass
- · Ceramics
- · Acrylic (dark)
Accessories & add-ons
Typical inclusions and add-ons for this profile : confirm your SKU.
- Optional
Enclosure / cabinet
Third-party enclosure improves smoke control and safety
- Recommended
Laser safety glasses
~450 nm diode: OD rated for your wavelength
- Recommended
Fire extinguisher
Editorial guidance : not a live parts list. See also: Ventilation setup · Safety basics
Practical notes
Beginner notes
This profile covers AtomStack A70 Max. Read the TL;DR and benchmarks before buying, then compare nearby models on the Compare page.
Pro tips
Run scrap tests first. Use this profile’s reference times for quotes, not marketing claims.
Pro / technical specsRaw numbers for experienced users comparing machines.
- Max speed (spec)
- 400 mm/s (24,000 mm/min)
- Avg engrave speed
- 100–200 mm/s fill
- Avg cut speed
- 10–20 mm/s on 3–6 mm wood
Alternatives to the AtomStack A70 Max
Machines in the same space, picked from our database by type, price, and score.
Sculpfun · Diode · $1,399 – $1,899
Sculpfun's S70 MAX pushes the S-series frame to ~70W optical class for shops that want maximum diode cutting depth without CO₂. Same oversized bed philosophy as S40 MAX: premium pricing and workshop space requirements apply.
Sculpfun · Diode · $999 – $1,299
The S40 MAX (2025) targets makers who outgrew 400 mm frames: 830×800 mm work area, 48W optical power, auto-focus, and Wi-Fi via TS1 screen. Built for sign panels and batch cutting: verify shipping weight and workshop space before ordering.
Atomstack · Diode · $1,999 – $2,799
AtomStack X30 Pro targets buyers who want maximum diode-class cutting in an open frame. Marketing uses very high watt labels: verify real optical output and compare to Longer B1 40W and similar before spending.