Atomstack A20 Pro Settings & Speeds

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Kraft paper on A20 Pro.

Cardstock on A20 Pro. Single clean pass.

Paper on Atomstack A20 Pro 20W.

Higher DPI tumbler pass for fine detail or photo on powder-coated stainless. Rotary required. Keep power moderate.

Powder-coated tumbler engraving — use rotary attachment. Low power to ablate coating without gouging metal. Test on a scrap tumbler first.

Plywood engrave pass for surface marking and score lines. Adjust DPI to 300+ for photo engraving.

Generic plywood cut — 2 passes for cleaner edge. Pin material flat to avoid shift between passes. Actual passes depend on plywood thickness and glue density.

Higher DPI for fine text and logos on anodized aluminum. Slower speed with lower power gives crisper edges.

Diode lasers mark anodized aluminum directly by ablating the dye layer. No coating needed. Keep power moderate to avoid overburning.

Slower pass for deeper Cermark bond on stainless. Multiple thin coats of spray gives better adhesion.

Apply Cermark or black Molybdenum spray before engraving. Wash residue with water after. Without coating, diode lasers cannot mark bare stainless steel.

Slower pass for finer detail on glass. Mask surface with wet tissue to improve result.

Glass engraving on diode — use masking tape or wet newspaper on surface to reduce micro-fracturing.

Higher speed with full power for faster throughput on marble tile engravings.

Marble ablates cleanly. Lower power than slate — start here and increase if mark is faint.

Higher DPI for fine detail and photo work on slate coasters.

Lower speed for denser ablation on dark slate. Wipe surface clean after engraving.

2mm basswood cuts in a single pass on most diode lasers. Air assist keeps the cut clean and reduces char.

Ablates spray paint to reveal bare metal. Thinner than powder coat so needs less power. Reduce power if paint splatters. Clean with IPA first.

Ablates powder coat to expose bare metal. Clean with IPA first. Black powder coat gives highest contrast. No Cermark needed.

Ablates powder coat to reveal bare metal beneath. Works on powder coated panels, signs, and flat stock. Clean with IPA first. Black powder coat gives highest contrast. No Cermark needed — laser burns off the coating directly.

Engrave from the BACK side for a clean mirrored result.

Cast acrylic cuts cleaner than extruded.

20W diode cuts leather in 2 passes. Ventilate well — leather fumes are strong.

Plywood in 2 passes at 85% with air assist.

Clear acrylic needs 4+ passes at full power on 20W diode.

Cork cuts cleanly. No air assist to prevent movement.

Engrave leather at moderate power. Ventilate well.

Bamboo needs 2 passes at 90% on 20W diode.

20W Atomstack cuts 3mm basswood in one pass with air assist.

Stainless steel at 20W. Marking spray. High power.

Cork sheet 3mm at 20W. Single pass.

Marble tile at 20W. High power for frosted result.

Cotton at 20W. Light fast pass for texture.

Foam board 5mm at 20W. No air assist.

Bamboo 3mm at 20W. 3 passes. Air assist essential.

Chipboard 2mm at 20W. 2 passes.

Corrugated cardboard at 20W. 2 passes typical.

Rubber stamp at 20W. 300 DPI. Invert design.

Denim engrave at 20W. Worn look. Test power first.

HTV vinyl at 20W. Light score, not full cut.

Faux leather at 20W. Air assist recommended.

Mylar stencil at 20W. Fast and accurate.

EVA foam 6mm at 20W. Skip air assist.

Felt at 20W. Fast single pass. Air assist on.

Copy paper 80gsm at 20W. High speed, low power.

Cardstock 300gsm at 20W. Single pass, high speed.

Same laser module as X20 Pro. Atomstack officially lists cardboard as a supported cut material for the A20 Pro/X20 Pro/S20 Pro family. Community guidance from lahobbyguy.com/bb/viewtopic.php?t=33 and diode-laser-wiki.com is consistent across 20W diode laser brands. 800mm/min at 50% power is a reliable community starting point for standard corrugated cardboard.

Identical laser module to X20 Pro. LA Hobby Guy forum (lahobbyguy.com/bb/viewtopic.php?t=4458 'cut and print settings Atomstack A20 pro') confirms A20 Pro users see similar MDF cutting behavior. One user reported 100mm/min at 100% power for 1 pass; 200mm/min / 2 passes with air assist is the more community-standard approach for cleaner results.

Same laser module as X20 Pro; same community settings apply. Atomstack officially lists slate as an engravable material for the A20 Pro. Source: lahobbyguy.com/bb/viewtopic.php?t=2916 and forum.lightburnsoftware.com/t/lightburn-grayscale-engraving-on-slate-using-lasermatic-mk2-20w-diode-laser/171784 (LaserMatic 20W diode, same power class).

Same settings as X20 Pro — identical laser module. Source: lahobbyguy.com/bb/viewtopic.php?t=10243 and general 20W diode community guidance. Atomstack officially lists leather as an engravable material for the A20 Pro. Vegetable-tanned leather recommended; chrome-tanned leather releases toxic fumes.

A20 Pro shares identical 20W optical output with X20 Pro; same community settings apply. Atomstack officially lists 'aluminum oxide' as an engravable material for both machines. Source: forum.lightburnsoftware.com/t/need-some-speed-power-settings-for-atomstack-a20-pro/107898 and general 20W diode community guidance at lahobbyguy.com/bb/viewtopic.php?t=33.

Same official Atomstack engraving parameter table applies to A20 Pro as to X20 Pro. Line interval 0.1mm, 3000mm/min, 20% max power. Source: atomstackshop.com/blogs/engraving-and-cutting-parameter/lightburn-x20-pro-engraving-parameter-table and atomstack.com/pages/material-setting.

A20 Pro, X20 Pro, and S20 Pro share identical 20W optical output and the same official parameter tables per Atomstack. Settings transfer directly. LA Hobby Guy forum (lahobbyguy.com/bb/viewtopic.php?t=4458 and t=3572) confirms A20 Pro users use similar 300mm/min / 90% settings for 3mm basswood. Air assist (F30/F60 kit) strongly recommended for clean cuts.

Birch glue layers vary in density — 3 passes needed for consistent cut-through. Check flatness of sheet.

Great contrast on bamboo. Very popular for personalised gifts. Wipe residue with damp cloth after.

Cork chars easily — keep power low. Good for coasters and decorative items.

What materials can the Atomstack A20 Pro engrave or cut?

The Atomstack A20 Pro has community-tested settings for Kraft Paper, Cardstock, Paper, Coated Stainless Steel Tumbler, Plywood, Anodized Aluminum, Stainless Steel, Glass, and 39 more. Results vary by material batch, focus, and ambient conditions — always test on scrap first.

Is the Atomstack A20 Pro compatible with LightBurn?

Yes, the Atomstack A20 Pro works natively with LightBurn.

What settings should I use to cut Kraft Paper on the Atomstack A20 Pro?

A community-tested starting point is speed 2500 mm/min, power 22% in a single pass. Always run a test cut on scrap to confirm before committing to your project.

Can the Atomstack A20 Pro engrave metal?

Diode lasers can mark anodized aluminium, coated metals, and powder-coated surfaces without any spray. For bare steel, brass, or copper you need a marking compound like Cermark or Dry Moly. Fiber lasers mark bare metal directly without any coating.