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GRBL USB port Laser control board , can external connect nema23 nema34 stepper motor driver for more big laser engraving machine - BeamQus
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Improved GRBL 1.1 Control Board with Fan for 1610/2418/3018 DIY Laser Engraving Machine USB Connection for Offline Controller Pour 3 Axis CNC : Amazon.de: Business, Industry & Science
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