Note:

This CNC Board just has two laser interface, so it just can be connected laser of two interface.

 Introduction  

This kit mainly includes a keyestudio CNC V0.9A and three A4988 driver modules.

Keyestudio CNC GRBL V0.9 is a main board developed by Keyestudio for CNC, laser engraving machine, writing robots and other robots. It has complete interfaces with cost-effective and can be driven via external connection, suitable for DIY and factory use.

The A4988 is a DMOS microstepping driver with converter and overcurrent protection, which can operate a bipolar stepper motor in full, half, 1/4, 1/8 and 1/16 step modes, with output-driven performance up to 35 V and ± 2A. The A4988 also includes a fixed off-time current regulator that operates in slow or mixed-decay modes.

Specifications of CNC V0.9A

1.      Microprocessor：MEGA328p

2.      Input Voltage：DC 12V

3.      Supporting File Format：Gcode

4.      Supporting Machine Structure：CNC, laser engraving machine, writing robots

Features of A4988 Driver

1.      With simple stepper and direction control interface.

2.      Five different step modes: full, half, 1/4, 1/8 and 1/16 step modes.

3.      Adjustable potentiometer used to adjust the max current output to gain higher step rate.

4.      Automatic decay mode detection/selection.

5.      Overheat closed circuit, under-voltage lockout, cross-current protection.

6.      Ground short-circuit protection and load short-circuit protection.  

Setting Method of A4988 Working Mode