Boss Laser LS-1420 100W Granite Laser Settings

Boss Laser LS-1420 100W Laser Settings for Granite

1 verified settings · manufacturer data · co2 glass laser · Updated January 2026

Quick Answer — Best Engrave Setting100W

275

Speed (mm/s)

25%

Power

Passes

Air assist: NoSource: Boss Laser 100W LightBurn Library

Operation	Speed (mm/s)	Power (%)	Passes	Air Assist	Notes
engrave	275	25%	1	—	LightBurn Library: Scan [bidir=true, overscan=0]

About Granite Settings for the Boss Laser LS-1420 100W

The Boss Laser LS-1420 100W cuts Granite cleanly at 275 mm/s with 25% power. Always test on a scrap piece first — every machine is slightly different, and variables like tube age, lens condition, and material batch can shift results.

For Granite, the key variables to dial in are speed and power. If the laser isn't cutting through cleanly, slow down or add a pass before pushing power higher — excessive power causes charring and wider kerfs. Air assist is highly recommended for wood and organic materials to clear smoke and protect the lens.

Once you find settings that work, save them in Laser Lab to build your personal settings library. The AI predictor uses your calibrated results to suggest starting points for new materials automatically — so the more you log, the smarter it gets.

Frequently Asked Questions

What speed and power for Granite on the Boss Laser LS-1420 100W?↓

For cutting Granite on the Boss Laser LS-1420 100W, start at 275 mm/s speed and 25% power. These are manufacturer-verified starting points — always test on scrap first.

Do I need air assist for Granite on the Boss Laser LS-1420 100W?↓

Air assist is not required for Granite on the Boss Laser LS-1420 100W according to manufacturer data, though it can still help reduce smoke and improve cut quality on organic materials.

How many passes to cut through Granite on the Boss Laser LS-1420 100W?↓

The manufacturer recommends 1 pass to cut through Granite at 275 mm/s and 25% power. If the cut isn't clean, try reducing speed slightly before adding more passes.

Why isn't my Boss Laser LS-1420 100W cutting through Granite?↓

Incomplete cuts are usually caused by incorrect power, speed, or focus distance. If edges are charred, try increasing speed or reducing power. If the laser isn't cutting through, reduce speed or increase power — or add an extra pass. Also verify your focal distance is correct for the material thickness and that your lens is clean.