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This month’s Arduino article is connected to my Linux Labs article (earlier in this issue) on building the RepRapPro Fisher 1 3D printer. How? Well, the Fisher 1 is powered by a board which is entirely compatible with the Arduino Due. The Duet The Duet was developed by Andy and Tony from Think3dPrint3d in conjunction with RepRapPro. It’s entirely compatible with the Arduino Due and is purposely built for 3D printers. It mashes together the Due with five stepper motor controllers (the five sets of seven pins at the top of the board in the photo). It also has an Ethernet port and a high speed SD card slot. Open According to the wiki page: The Duet hardware design is licensed under the CERN OHW License 1.2 (http://www.ohwr.org/documents/294): the design is free to be distributed and modified within the terms of this license. All the design files are available on Github (https://github.com/T3P3/Duet). The Duet was completely designed using the Open Source software package KiCAD (http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite) so hacking and building on this design is accessible to all.
Software Running RepRap Firmware, the software receives GCode (the commands that tell the printer where to place the print head) via the USB port, and from the SD card or from the Ethernet interface. The Arduino IDE (amongst other things) allows the firmware to be updated, or replaced by other firmware which is not from RepRapPro. Personally, I’ve not used the USB port for uploading files to the printer, but I have used the Ethernet interface and the SD card. Both work like a charm. Conclusion Follow along with my future Linux Labs articles and you’ll see how important this little board is when it comes to 3D printing. Source: http://reprap.org/wiki/Duet