OMTech K40 Smoothieboard Main Board Upgrade for 40W Laser Cutters Engravers &c 797434237934 | eBay
OMTech K40+ Laser Engraver Motherboard Upgrade, Replacement Control Board for CNC CO2 Laser Cutter Engraver Machines with Rotary Axis Autofocus Support, Smoothie Mainboard for LightBurn K40 Engraving
blue-box-guide [smoothieware.org]
Smoothieboard - The future of CNC motion control by Uberclock, LLC — Kickstarter
Vince Lee on Twitter: "Upgraded K40 Laser Cutter switches between AZSMZ Smoothieboard and Moshiboard https://t.co/qzFnhfC5OS #lasercutting https://t.co/VAEqi3wqdP" / Twitter
laser-cutter-guide [smoothieware.org]
Don's Laser Things: K40-S Laser Power Supply Control "Take 2"