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!
|Amount||Part Description||Allied Part #||Notes|
|1||voltage regulator||70099596||LM317T Adjustable 2.2-3.7 Voltage Regulator|
|1||glass lens||405-G-2 Glass Lens for Aixiz Laser Module 405nm|
|1||diode||Cassio- 2W 445nm M140 Blue Diode|
|1||mechanical endstop||Signwise 3 pack endstop|
|2||stepper motor||ZJchao 57-ox-in 1Nm Nema 17 Stepper Motor 1.3A 40mm|
|1||power supply||NEWSTYLE 12V 30A DC Universal Power Supply 360W|
|1||controller kit||OSOYOO Printer kit controller RAMPS 1.4
Mega 2560 R3
Stepper Motor Driver
LCD 1286 Graphic display
|8||linear bearing||Sprite Science 12LM8U Linear bearings|
|4||linear rods||Linear motion 8mm shaft 406mm length chrome plated case hardened|
|1||cooling fan||Uxcell 92 x 25mm DC 12V
|2||belt and pulley||Aluminum GT2 16T Pulley and 2M Belt|
|2||PIC16F88||70045634||18-Pin PDIP, SOIC|
|1||transparent wall||250nm to 520 nm laser shielding - 12” X 12”|
|1||alert buzzer||12mm Dia. DC 5V 2 Terminals Electronic Continuous Sound Buzzer|
|1||3D-printed parts||70369255||3mm ABS filament|