Control of a CNC laser engraver machine for non-metallic materials

The present work consists of the development of a control system by means of a microprocessor for a prototype of engraving of non-metallic materials using a semiconductor laser, which has the purpose of carrying out said process without the use of any image processing software as they do. other common marketing devices. This prototype is based on a Cartesian positioning robot, built with a 20mm structural aluminum profile, a 450nm wavelength laser module at 1W of power adjustable by PWM pulse width modulation, 3 motors with Nema 17 bipolar steps, an ATMega2560 microcontroller and a CNC shield card. As a result, we obtain a prototype of a laser engraver with a microcontroller control system, which according to the tests carried out has an efficiency of 95%, capable of carrying out a maximum of 27 engraving processes every 60 minutes with a 30-minute break and that does not use image processing software.