How to Build a Homemade CNC Laser Engraver

A DIY project to help with your DIY projects? This edition of Gadget Freak is going meta with a CNC laser engraver made by Amy Kippen and her team of fellow students at Colorado State University.

The CNC laser engraver consists of a user-controlled laser mounted to the Y axis and an engraving plate mounted to the X axis. Motion of the laser and engraving plate are controlled using G-code, which allows the laser to engrave two dimensional designs or images into wood.

A user can input G-code through an SD card on the back of the LCD display. Using the push-button/dial to control the LCD screen, the user selects the correct G-code. The LCD also provides users with visualization and control over the laser casing temperature via alteration of fan speeds. The X and Y axes are each controlled by a stepper motor, and proximity switches are used to limit the motion of each axis past structure walls.

The engraver is also equipped with a safety feature that turns off the laser when the door is open and a program is running. A green LED is lit while the engraver is running. If the door is opened a limit switch inside the door is disengaged and a signal is sent to turn off the green LED and turn on the safety feature, which includes a red LED and an alert buzzer. Disengaging the limit switch also triggers a relay that turns off the laser. Once the door is closed the laser resumes engraving.

Click the image below for a slideshow of the build instructions.

And click here to download the full build instructions including schematics, diagrams, and code.

Do you have a cool, original, homemade gadget you'd like to share with the world? Give us the details at DesignNews.com/GF, and you may receive $500 and automatic entry into our $6000 Gadget Freak of the Year contest!

Do you have a cool, original, homemade gadget collecting dust in your garage? Give us the details at DesignNews.com/GF, and you may receive $500 and automatic entry into our $6000 Gadget Freak of the Year contest!

[All images courtesy Amy Kippen]

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