Product Review

CNC Expansion Board:
-GRBL 0.9 compatible
-Runs on 12-36V DC
-4-Axis support: X, Y, Z
-It can drive 4 stepper motors, and each stepper motor only needs 2 IO ports.
That is to say, 6 IO ports can manage 3 stepper motors very well,
which is very convenient to use.

DRV8825 Stepper Motor Driver:
-Applied for driving stepper motors up to 8.2V-45V 2.5A
-4-layer PCB board (better heat dissipation)
-6 different step resolutions:
full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step

Mechanical Switch Endstop:
-Length of Cable: 70 cm
-Red line --- VCC (ramps of +)
-Black wire --- GND (ramps of -)
-Green Line --- SIGNAL (ramps in s)

Package Contents:
1 x CNC Shield Board
1 x KeeYees Board
4 x DRV8825 Stepper Motor Driver with Heat Sink
4 x RAMPS Mechanical Switch Endshop
20 x 2.54mm Black Jumper Caps
1 x 1.5m USB cable