![]() RAMPS is almost identical to the board above, except it also has MOSFET outputs for the HBP and nozzle heaters, a fan output, and thermistor inputs. M,many 3D printer control boards run like that – RAMPS and RAMBo are the two I’m most familiar with. Posted in Arduino Hacks, cnc hacks Tagged g-code, grbl, motor driver, pololu, shield Post navigation ![]() posted his Gerber files for download if you want to put in a small run with OSH Park or a similar service. This is a dual-layer board which may not be ideal for your own fabrication process. There’s even a header for SPI making it easier to add custom hardware if necessary. The DIL header on the right breaks out all of the connections to the limiting switches (two for each axis), spindle and coolant control, as well as three buttons for pause, resume, and abort. The terminal block in the center feeds the higher voltage rail necessary for driving the motors. Going this route makes replacing a burnt out chip as easy as plugging in a new module. The purple boards slotted into the pairs of SIL headers are Pololu Stepper motor drivers. This familiar footprint manages to contain everything you need for a three-axis machine. In that case, grab your Arduino and heat up that etching solution to make your own GRBL compatible shield. By the time you get to the point in a home CNC build where you’re adding control electronics you may be ready for the simplest means to an end possible.
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