Description: Use removable A4988 or DRV8825 compatible stepping driver. The extension board can be used for engraving machine or 3D printer driver. Compatible with GRBL 0.8. Open-source firmware operated on Arduino UNO, converting G code command into stepping signal. PWM spindle and direction pin, 4 shaft support (X, Y, Z, A - you can copy X, Y, Z or use pin D12 and D13 customize firmware perform complete shaft 4). Compact design, stepping motor can connect connectors or be soldered. Size: Approx. 6.8x5.2cm/2.68x2.05inch; 2x1.5cm/0.79x0.59inch; 6.8x 5.3cm/2.68x2.09inch Specification: CNC Expansion Board: Version: V3.0 Voltage: DC 12V to 36V (only DRV8825 driver can handle up to 36V, so please consider voltage for power supply) 4pcs A4988 Driver: Thermal Shutdown Circuit: Yes Cross Current Protection: Yes Ground Fault Protection: Yes Short Circuit Protection: Yes Compatible Logic Voltage: 3.3V and 5V Five Step Modes: Full, 1/2, 1/4, 1/8 and 1/16 Mix with slow current attenuation model. Internal UVLO and low RDS (on) output. Automatic current attenuation mode Detection/Select. Phase-in rectifier, low power consumption. Warning: Connecting or disconnecting stepping motor while driver is powered on might damage driver. 4pcs Heat Sinks: Color: White Package Includes: 1 piece of CNC V3 Shield 4 piece of Stepper Drivers 4 piece of Heatsinks
