Features: Expansion board can be used as carving machine, 3D printer or other drive expansion board. Compatible with GRBL 0.8 Open source firmware that is run to convert G-code commands to step signals. PWM spindles and direction pins support 4 axis (you can copy X, Y, Z, A-X, Y, Z or use D12 and D13 pins for custom firmware to perform a complete axis 4). Compact structure stepping motor can be connected to a 4-pin connector or soldered. This is a set of disassembled parts and requires basic soldering techniques to solder them together.




Specifications: Radiator Size: Approx. 8 x 8 mm CNC Expansion Board: Version: V3.0 Voltage: DC 12V-36V (Only DRV8825 driver can handle voltage up to 36V, so please consider the power voltage.) Board Size: Approx. 68*53mm/2.7*2.1" A4988 Driver Module: Thermal Shutdown Circuits: Yes Crossover Current Protection: Yes Short Circuit Protection: Yes Compatible Logic Voltage: 3.3V, 5V 5 Modes: Full, 1/2, 1/4, 1/8, 1/16 Size: Approx. 20 x 15mm/0.8 x 0.6 inch mixture of slow current attenuation models. Internal UVLO and low RDS (on) output Current attenuation mode is automatically detected/selected. Three-phase rectifiing, low power consumption. Package List: 1 x CNC V3 Expansion Board 4 x A4988 Driver Module 4 x Radiator