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Amazon.com: RAMPS 1.4, 3D Printer RAMPS 1.4 Controller + R3 + A4988 with Heat Sink USB Calbe Jumper Kit : Industrial & Scientific
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Upgrading of a board with the Marlin firmware for laser engraving using an RAMPS 1.4 board as an example. - EnduranceLasers
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Aokin 4PCS RAMPS 1.4 Mechanical Switch Endstop + CNC Shield V3.0 Jumpers DRV8825 A4988 GRBL Stepper Motor Driver Heat Sink - AliExpress
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