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☝️ Marlin Firmware is a popular open source firmware for #RepRap 3D printers. Built on the #Arduino platform, Marlin is optimized to run on anything from a modest 32KB AVR to a powerful 32-bit ARM. Created by hobbyists for hobbyists, it also runs CNC mills, lasers, plotters, pick-and-place machines….

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Marlin sanity-check and change errors include some guidance on what needs to be changed, so read those errors carefully. It may help to start with an example configuration closest to your machine model and make small adjustments from there.