AtomStack A70 Max

Name: AtomStack A70 Max
Brand: Atomstack
SKU: atomstack-a70-max

70–77W CoS-packaged diode — 850×800 mm flagship Atomstack cutter

Last updated June 1, 2026How we evaluate

Released November 2024

What this machine is for

Maximum Atomstack diode power for large panels and deep wood cuts

Reference benchmark same job size on every machine so you can compare times fairly.

Laser spot size

0.12 × 0.18 mm (70W) / 0.08 × 0.12 mm (35W)

Smaller spot = finer detail (frame motion is usually the same across tiers)

Motion precision: 0.01 mm

Sample engrave job

~5–8 min

Filled photo or logo on birch plywood

10 × 10 cm (4 × 4 in)

Sample cut job

~2–4 min

Simple square cut-out from 3 mm basswood

10 × 10 cm (4 × 4 in)

Times are estimates for the reference job above; your design complexity and settings will change them.

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.

What this machine is for

Large-format high-power diode for production-style wood and acrylic cutting plus detailed engraving.

Best for

Large signsDeep wood cutsAtomstack ecosystemCO₂ alternative

Materials

Engraves

· Wood
· Leather
· 304 stainless (mirror, settings-dependent)
· Glass
· Ceramics
· Acrylic (dark)

Cuts

· 25–28 mm wood (claimed)
· 26 mm acrylic (claimed)
· Thin steel plate
· Basswood

Cannot do

· Clear acrylic
· Compact apartments without ventilation
· True fiber metal depth

Pros

✓Among the strongest desktop diode packages
✓Huge work area with 0.01 mm engraving spec
✓Auto-focus + manual focus
✓Interchangeable 35W / 70W modules

Cons

✗Heavy (~19 kg) — needs sturdy table
✗Premium price vs S40 MAX
✗Open frame and flame monitoring still your responsibility
✗Marketing pass claims need your own material tests

Beginner notes

Not a first laser — buy after you've outgrown 20–40W. Compare Sculpfun S70 MAX and enclosed Acmer P3 if smoke control matters.

Pro tips

Plan enclosure and exhaust before ordering — community designs exist for A70 footprint.

Pro / technical specs

Raw numbers for experienced users comparing machines.

Laser spot size: 0.12 × 0.18 mm (70W) / 0.08 × 0.12 mm (35W)
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
Motion precision: 0.01 mm