Ramps 1.4 and Arduino Mega 2650 (1 reply)

I have a Infinibot CR-7 with a Ramps 1.4 clone Mega 2650 and ReprapDiscount Full Graphics Smart Controller.

I understand that one can print with out a computer using the Controller.
Am I right or wrong? Every thing print using the SD card with computer attached over USB port.
Power to Ramps is 12V.

What do you guys think?

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