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The GRBL code is responsible for taking the g-code commands sent from the computer, storing them in a buffer until they are ready to be converted to step and direction signals and sent to the CNC ...
The DB25 (originally DE-25) connector is an analog 25-pin plug of the D-Subminiature connector family (D-Sub or Sub-D). The DB25 connector is mainly used for serial connections, allowing for ...
My X31 had a parallel port, and there was a serial port on the optional UltraBase. I've never seen the UltraBase in person, but I expect it makes the X31 one thick but tiny footprint beast.