3D Printer Kit UNO R3 Enhanced Edition RAMPS 1.4 Mechanical Switch Engraving Machine 42 Stepper Motors Features: 3D Printer CNC Kit, GRBL CNC Shield Professional CNC Module Kit with 4-layer PCB board for enhanced heat dissipation. Includes R3 board + RAMPS1.4 mechanical switches - end stops + DRV8825 stepper motor drivers + Nema 17 stepper motors. Elevate your DIY projects with this premium CNC kit crafted from durable ABS material, ideal for hobbyists and professionals alike. 4 DRV8825 stepper motor drivers with heat sinks, upgraded from A4988 for enhanced performance. This CNC kit delivers unmatched precision, ensuring accuracy and consistency in every cut or engraving, making it a reliable tool for all your fabrication needs. Specifications: Item: Latest CNC Enclosure - Kit Compatible With: A4988 or DRV8825 Stepper Drivers Operating Voltage: DC12-36V Max. Operating Current: 2.5A RAMPS1.4 Mechanical Switch - Limit Switches: Red: VCC (Ramp+) Black: GND- (Ramp-) Green: Signal (Wall) DRV8825 Stepper Motor Driver: Upgraded from A4988 Max. Current: 2.5A Suitable for driving stepper motors - up to 8.2V~45V, 2.5A Nema 17 Stepper Motor: Rated Current/Phase: 1.7A Note: Due to lighting effects and shooting angles, slight tolerances may occur in the product. Your understanding is appreciated. Allow 0-1cm error due to manual measurement. Package Includes: 1 x CNC-Shielded-V3 Board 1 x R3 MEGA328 CH340G with USB Cable 4 x DRV8825 Stepper Motor Drivers with Heatsinks 3 x RAMPS 1.4 Mechanical Switches 3 x 4-Pin Cables (70cm) 3 x Nema 17 Stepper Motors