Prerequisites for the CETUS Mellow FLY conversion Despite the name, they are just as well usable for most other 3D printers. There's an active Discord channel and a Facebook group around the Mellow Fly boards, and the Duet forum is excellent if you're looking for input on firmware configuration. Team Gloomy, responsible for the RepRap firmware port, has a great guide to perform precisely this Ender-3 conversion. The boards are called MELLOW Fly E3 because they're meant as a drop-in replacement for Ender-3s with compatible JST connector sockets and the same hole pattern. They are running powerful STM32 microprocessors for RepRapFirmware, have integrated WiFi with an external antenna, and plenty of IO-ports for fans, thermistors, sensors, and different types of screens.
#Cetus3d replacement parts drivers
There are two versions of it: the normal E3, which I also used and has replaceable stepper drivers, and the newer E3 Pro version has integrated and five instead of four TMC2209 stepper motor drivers with additional improvements. Simply put, the Mellow FLY RRF seems to be a cheaper version of the popular DUET 3 Mini 5+ because it sells for only around $60.
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