GRBL offline working controller

–Manually control: manually adjust X, Y, Z axis location as engraving starting point, manually open or close spindle, manully open or close cooling fan

–File engraving: after off-line controller save file, it can connect the GRBL control board and process engraving, no need to connect PC computer

–Save file: after the off-line controller connect PC, it will be recognized as USB, large capacity storage device,can access engraving file directly.

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