Color:CNC Shield V3+R3+A4988 Driver Kit Specification: (1)3D Printer CNC Shield Board V3.0 GRBL compatible. 4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13) 2 x End stops for each axis (6 in total) Spindle enable and direction Coolant enable Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825 and others) Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping ) Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place. Runs on 12-36V DC. (At the moment only the Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.) (2)A4988 Stepper Motor Driver Thermal shutdown circuitry:Yes Crossover-current protection:Yes Ground fault protection:Yes Load short-circuit protection:Yes Compatible logic supply: 3.3V and 5 V Five selectable step modes: full, 1/2, 1/4, 1/8 and 1/16 Features: 1.Mix with slow current decay modes. 2.Internal UVLO and Low RDS (On) Output. 3.Automatic current decay mode detection/selection. 4.Synchronous rectification for low power dissipation. Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver) (3)R3 Development Board(more details please search the asin B0168B39N4) Package Included: 1 x R3 Development Board 1 x Engraver CNC Shield Board 4 x A4988 Stepper Motor Driver 1 x 30 cm USB Cable
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