Specification:Rated Voltage:24VEngraving area: 16x10x4.5cmSpindle: 775 spindle motorSoftwear: GRBL control systemssupport system: 24V 5.6A adapterStepper motor: fuselage length 34MM,Current 1.33A, 12v.Torque 0.25N/MSpindle: 775 spindle motor (12-36V) 24V:10000r / minSupported System: Windows XP / Win 7 / Win 8 / Win 10 / Linux.Drill bits: tip 0.1mm ,20 degree , diameter3.175mm. the package include 10pc.clamps: 4 pcs, Hold the thickness of 0-30mm,size: 50 * 20 * 3 (length * width * thick), the inner slot width 6mm 
Feature:1. Support GRBL and benbox firmware. Support CNC 3-axis laser engraving machine.
2. The stroke length isn't limited to 30x18 and 24x18, it can be setting other length. Please set the stroke in the command.
For example
3018, please set the stroke in the command, 30cm length and 18cm width;
2418, please set the XY stroke in the command, length 24cm, width 18cm.

3-Axis GRBL Control Board
Output signal:
1: Fan: Used for shaft motor cooling
2: Shaft: Connect motor shaft, keep the same with power supply voltage, 5A electricity, if the motor power of the spindle is high, can connect external relays such as the switch. G code M3 open, M5 closed, with version 0.9 of the firmware can adjust PWM, achieve the speed of the axis governing and tunable laser
3: X axis motor signal output, A4988 max 1.5A electric current
4: Y-axis motor signal output, A4988 max 1.5A electric current
5: Z-axis motor signal output, A4988 max 1.5A electric current

Input Signal:
1: X-axis minimum limit X-
2: Y-axis minimum limit Y-
3: Z-axis minimum limit Z-
4: Reset button: press the button, system will restart, can be used for urgent stoping of machine

GRBL Off-line Controller
Press Z+ and Z- , the Z axis will move up and down.
Press X+ and X- , the X axis will move left and right.
Press Y+ and Y- , the Y axis will move Front and Back.
Press SPIN : Spindle on (Laser on ), Spindle off (laser off)
Press SMOD: return
Press Z+ for 5 seconds , change the Language to English.
SD Card: Included , you need a SD card reader to write into the root directory G-code files .
Notice:
The Laser Interface is 3 pin on this control board. Only support 42 stepper motor.