RATTMMOTOR 3D Printer CNC Controller Kit Compatible with Arduino IDE, Nema17 Stepper Motor+UNO R3 Improvement Borad+CNC GRBL Shield Board V3 Expansion Board+DRV8825 Drivers+Mechanical Switches

Nema17 Stepper Motor Step angle: 1.8deg; Rated current: 1.7A; Holding torque: 0.45Nm (64 oz.in); Size: 40mm; Phase: 2; 1.8 ° ± 5% step angle (200 steps / rotation) UNO R3 Improvement Borad UNO is a Simple I/O platform based on open source code, and has a Processing/Wiring development environment similar to Java and C language, which is easy to understand, allowing you to quickly use UNC to make interesting things CNC Shield Board V3 Expansion Board This expansion board can be used as a drive expansion board for engraving machines, 3D printers, etc.

DRV8825 Stepper Motor Driver Six different stepping modes: full, half, 1/4, 1/8, 1/16, 1/32; The adjustable potentiometer can adjust the maximum current output, so as to obtain a higher step rate Mechanical Switches with 3-pin Cable Under normal circumstances, the system needs to be equipped with at least 3 mechanical switches; easy to install, more common styles.