Inventables Electronics Batch 1

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Revision as of 14:01, 19 June 2012 by JeremyBP (Talk | contribs) (Arduino, Shield, and E-Stop)

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ShapeOko kits purchased through Inventables come with a full set of electronics, which includes the following:

  • Arduino Uno
  • GRBLShield
  • Power Supply
  • Stepper Motors
  • Spindle
  • Emergency Stop
  • Terminal Strip
  • Cables and Connectors
  • Case


The Arduino is the heart of the electronics. It contains an AVR Processor, a USB connector, and I/O pins. The Arduino comes with grbl already installed on board. grbl reads g-code that is sent over USB and translates it into movements for the stepper motors on the ShapeOKO. The particular version of grbl on the Arduino also comes pre-configured for the ShapeOKO, and should not require any tweaking to operate.


The GRBLShield plugs into the stop of the Arduino, and is what takes the signals grbl generates and drives the steppers. As shipped from Inventables, the shield has had the micro-stepping changed on the Z-axis driver to enable faster travel speeds.

Power Supply

The power supply provides 24 volts at 4.5 amps. Be careful with it, and don't work on power wires when the power supply is plugged in. The connector that ships with the power supply comes with plugs on both ends. It needs to be modified ion order to plug into the GRBLShield.

[Placeholder for tutorial video]


Arduino, Shield, and E-Stop

Unscrew the top of the E-Stop switch. Then unscrew the silver collar below it. Below that, there is a white collar with a rubber ring on top of it. Screw it all the way down. [image of switch assembly] Fit the switch into the large hole on the case, and then screw down the silver collar to hold it in place. Replace the top. [image of switch installed in case]

Place the Arduino on top of the case. The USB jack should be facing away from the E-Stop switch. Using M3x12 screws and nuts, attach the Arduino to the case. Snug down the screws, but don't make them too tight. You don't want to crack the circuit board. [image of the arduino attached to the case]

The GRBLShield plugs into the top of the Arduino. It only goes in one way -- the power connectors should be on the same side of the Arduino as the USB jack. [image of shield mounted to arduino]