What is grblShield?

Question: What is a grblShield?
Answer: The Arduino grblShield is a complete hardware solution for Dank's CNC motion control system called grbl.
Compatible with the Uno and other 328p versions of the Arduino development platform. (Note: grbl 0.6 is not compatible with 168-based Arduinos (nor will it ever be), and currently grbl does not support the Arduino Megas).

grbl Features:

• Interprets a subset of rs274/ngc standard gcode
• Three motion control axes - X, Y and Z
• Full support for arc motion
• Acceleration / deceleration management

grblShield Features:

• Compatible with grbl 0.6 and later versions
• Three stepper motors supporting X, Y and Z axes
• 8x microstepping
• 2.5 amps per winding (bipolar steppers)
• 12v-30v motor voltage supported
• Independent current control per axis
• Motor connectors plug compatible with RepRap and Makerbot electronics
• Uses TI DRV8818 stepper drivers