I made this design in order to utilized my abandoned stuff. This design was inspired by ZDV Laser Engraver, https://www.thingiverse.com/thing:2703455
thanks to ZhilDV for his design

For the small size laser engraver below 100 cm square, you might use 2020 aluminum extrusion, even though using 3030 V-Slot aluminum profile will produces more sturdy structure.

A board from Creality Ender 3 3D printer will be used as the Controler which is Marlin based firmware instead of GRBL. Then it will has a nice LCD display and printing from microSD feature.

The Laser module is 5.5 watt from this link :
https://www.aliexpress.com/item/High-Power-450nm-5500mW-12V-TTL-Adjustable-Focus-Blue-Laser-Module-DIY-Laser-Engraver-Accessories-5/32855784586.html?spm=a2g0s.9042311.0.0.2edb4c4dv6uPcf

Edited: Since this laser module is not available anymore on that link above, you may purchase the similar laser module with a PWM input feature suported

Laser PWM signal is derived from part cooling FAN signal with M106/M107 command. Since this board uses 24V power supply, i took the 5V PWM signal from the "Gate" pin of fan mosfet, to comply with PWM laser module input voltage.

PLASTIC PARTS:

• FrontRight Leg & RearLeft Leg --> 2
• FontLeft Leg & RearRight Leg --> 2
• Y Right Gantry --> 1
• Y Left Gantry --> 1
• X Gantry Main --> 1
• X Gantry Laser side Plate --> 1
• Laser adjuster --> 1
• X End Stop Switch case -->1
• X End Stop Switch case --> 1
• Laser Driver Module Holder --> 1
• Upper Controller case --> 1
• Lower Controller case --> 1

MECHANICAL PARTS:

• 3030 V-Slot 46cm, Rear/Front profile --> 2
• 3030 V-Slot 55cm, Right/Left profile --> 2
• 2020 V-Slot 49cm, X axis --> 1
• THK SR15W Linear Guide with 50cm rail length --> 2
• GT2 bearing Idle pulley, bore 5mm, diameter 18mm, width 6mm, no teeth --> 4
• GT2 motor pulley stepper 36 teeth, bore 5mm --> 1
• Openbuild aluminum spacer 10x6mm M5 -->4
• GT2 belt, width 6mm --> 150cm
• Smooth stainless steel rod diameter 8mm --> 50cm
• Flexible Couple D19 L25 5x8mm Aluminum --> 2
• 2020 aluminum corner bracket --> 8
• OpenBuilds CNC V-Slot POM Delrin V Wheel V-Wheel kit (with bearing) --> 4

ELECTRONIC PARTS:

• CREALITY ENDER 3 controler board --> 1
• CREALITY ENDER 3 stock SMPS Power Supply --> 1
• 4010 Fan (board coller) --> 1
• Minebea 17PM-K402-P4V stepper motor --> 2
• Makerbot compatible Limit Switch --> 2
• 5500mW Laser Module --> 1
• LM2596 buck converter for 12V Laser power supply --> 1
• Wiring