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The Atomstack X20 Pro is a 20W diode laser engraver with a 400×400mm work area. This page lists 67 community-tested settings covering speed, power, passes, air assist, and DPI across a range of materials. Always run a test cut on scrap material first — results vary depending on your material batch, focus, and ambient conditions.
The Atomstack X20 Pro is a 20W extended-frame diode laser with a 1000×800mm work area — one of the largest standard work areas available in a consumer diode laser. Designed for large signs, full-sheet plywood work, and oversized engraving projects. Works with LightBurn.
General 20W diode laser community guidance from LA Hobby Guy (lahobbyguy.com/bb/viewtopic.php?t=33 'Laser Power & Speed Settings for 20W Diode laser') and Diode Laser Wiki (diode-laser-wiki.com/documentation/guideline-settings/). Cardboard is an easy material for 20W diodes; 800mm/min at 50% is a standard community starting point for corrugated/craft cardboard. Speeds of 500-1000mm/min at 40-60% are the typical community-tested range. Air assist helps prevent flare-ups. Adjust down for thicker cardboard.
Community-sourced: Atomstack A20/X20 Pro forum users report 3mm MDF requires maximum power (100%) and slow speeds. One user confirmed 100mm/min at 100% power in 1 pass; 200mm/min in 2 passes (with air assist) is a more common balanced approach to reduce charring while ensuring full cut. MDF-core plywood confirmed harder to cut than veneer-core in same thickness. Source: lahobbyguy.com/bb/viewtopic.php?t=1704, forum.lightburnsoftware.com/t/atomstack-x20-pro-cutting-ability-why-cant-i-cut-anything/75758. Air assist is critical for MDF to clear smoke and prevent fire.
Community-tested on 20W diode lasers via LA Hobby Guy (lahobbyguy.com/bb/viewtopic.php?t=2916 'Settings for Slate'). Multiple users with 20W machines (including Atomstack X20 Pro) report 4000mm/min at 55% power as a reliable starting point. Lower power + faster speed consistently yields cleaner, lighter contrast. Wiping slate with acetone before engraving improves results. No clear coat needed post-engrave.
Community starting point for 20W diode leather engraving from LA Hobby Guy (lahobbyguy.com/bb/viewtopic.php?t=10243 'Leather settings for a 20W Diode laser'). General 20W diode guidance recommends 20-40% power at 2000-4000mm/min for engraving; 3000mm/min at 30% is a widely cited midpoint. Use vegetable-tanned leather only. Strong ventilation required. Lighter marks = less power or faster speed; deeper marks = more power or slower speed. Always run a material test.
Community-sourced from LA Hobby Guy / LightBurn forum discussions. Atomstack X20 Pro user reported 4000mm/min at 55% power giving good results on anodized aluminum — low power + fast speed gives cleaner marks vs. high power + slow speed which digs in and looks rough. Source: diode laser community consensus at lahobbyguy.com/bb/viewtopic.php?t=33 and forum.lightburnsoftware.com/t/diode-laser-speed-and-power-guide/43192. Diode lasers ablate the anodized coating only; they do not mark bare aluminum.
Official Atomstack engraving parameter table (atomstackshop.com/blogs/engraving-and-cutting-parameter/lightburn-x20-pro-engraving-parameter-table) — applies to X20 Pro, A20 Pro, S20 Pro. Line interval 0.1mm, speed 3000mm/min, 20% max power. Confirmed by multiple community sources. Note: the default LightBurn library incorrectly lists 180,000mm/min for basswood — ignore that; use the PDF/site value of 3000.
Atomstack support docs recommend 300mm/min, 90% max power, 1 pass for 3mm birch. MakeOrBreakShop review confirms clean single-pass cut on 3mm birch plywood with air assist enabled. Community at LA Hobby Guy (lahobbyguy.com/bb/viewtopic.php?t=1704) corroborates. X20 Pro has built-in air assist. Also reported: speed 4 (LightBurn units) / 98% power / 1 pass by another user.
What materials can the Atomstack X20 Pro engrave or cut?
The Atomstack X20 Pro has community-tested settings for 3mm Mirrored Acrylic, 3mm Clear Acrylic (Cast), 3mm Maple Plywood, Rubber Stamp Material, 3mm Walnut Plywood, Bamboo 3mm, Cotton Fabric, Denim Fabric, and 30 more. Results vary by material batch, focus, and ambient conditions — always test on scrap first.
What is the work area of the Atomstack X20 Pro?
The Atomstack X20 Pro has a work area of 400×400 mm (approximately 16×16 inches).
What settings should I use to cut 3mm Walnut Plywood on the Atomstack X20 Pro?
A community-tested starting point is speed 1500 mm/min, power 88% in a single pass. Always run a test cut on scrap to confirm before committing to your project.
Can the Atomstack X20 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.
"Used it with a Glowforge — engraved beautifully with no changes. I will be purchasing more digital downloads from this shop."
— Anna
★★★★★
"I was struggling with lining up my NFC business cards. I was able to not only line them up much better but also do multiple cards at once — making that job so much easier."
— Camp
★★★★★
"Excellent quality and design. Cut clean and neat!"
— LYNN
★★★★★
"Great jigs. Appreciate the time saved not having to build this from scratch!"
— Bruce
★★★★★
"Excellent quality. Item as described. Expectations exceeded."
— Michael
★★★★★
"This template made my slate coasters so much easier. 4×4 coasters from Michaels drop in easily and are easy to remove. Def worth it."
