The intelligent controller includes an SD card reader, rotary encoder and a 20-character x 4-line LCD display. You can easily connect it to your RAMPS 1.4 board using the "smart adapter" included.
 
After connecting this panel to your RAMPS 1.4, you don't need your computer to power your SD card smart controller. For all further operations, such as calibration, the axis motion can be done only with the intelligent controller of the rotary encoder. No need to computer print 3D design, just use G code design to store on SD card.
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