2:1 Dual Extrusion Y-splitter

thingiverse

**Update Oct 12, 2017** Completely revamped the design to add more space between the heater block and mounts. The fan now has a smoother airflow due to improved design. All parts are now sturdier thanks to the addition of four mounting points. The splitter is shorter and includes a space for filament strain relief. **Print at your own risk.** I've lost track of when I designed this, but I'm pretty sure I stuck to standard Prusa rod spacing. This is a simple Y-splitter that serves as a mount for the E3Dv6 hot end. It's been working great on my Folgertech 2020 i3. There are many improvements I want to make to these designs, but time constraints are holding me back. When switching filaments, there's a small problem where doing the quick "push pull" leaves a blob on your print wherever filament starts or stops. With more experimentation, this effect should be easily mitigated. **Use caution** when printing, especially at the start. When unloading material at the end of a job, you'll need to load the first material being printed, but this will prevent filament from jamming in the splitter. Here's a variant of gcode for tool changes: I prefer using Cura because it has prime towers built-in, but since it's the beta version, things don't always work quite right. Here's a quick program I made to work with Cura: https://github.com/Deepfriedchril/Slic3r-Prime-Tower-Gen ; Extruder Start G91 ; Relative moves. G1 E105 F2000 ; Quickly load next material 95%. G1 E5 F2000 ; Slowly load last 5%. G90 ; Absolute moves. G92 E0 ; Set extruder position to 0 ; Extruder End G91 ; Relative moves. G1 E4 F500 ; Quicky extrude about the length of your melt zone. G1 E-2 F1000 ; Do a quick retraction a little shorter than your melt zone. This is to avoid stringing. G4 P2500 ; Wait 2.5 seconds so that filament can set. G1 E-108 F8000 ; Quickly pull filament out of the Y-splitter. G90 ; Absolute moves. G92 E0 ; Set extruder position to 0 ;End gcode M104 S0 M140 S0 ; Pull out old material G91 ; Relative moves. G1 E4 F500 ; Quicky extrude about the length of your melt zone. G1 E-2 F1000 ; Do a quick retraction a little shorter than your melt zone. This is to avoid stringing. G4 P2500 ; Wait 2.5 seconds so that filament can set. G1 E-108 F8000 ; Quickly pull filament out of the Y-splitter. G90 ; Absolute moves. G92 E0 ; Set Extruder position to 0 T0 ; Select extruder 0 so that Octoprint reads the correct temp G28 X0 Y180 M84 **SLIC3R** ;Tool change gcode for E3Dv6 G91 ; Relative moves. G1 E4 F500 ; Quickly extrude about the length of your melt zone. G1 E-2 F1000 ; Do a quick retraction a little shorter than your melt zone. This is to avoid stringing. G4 P2500 ; Wait 2.5 seconds so that filament can set. G1 E-108 F8000 ; Quickly pull filament out of the Y-splitter. G90 ; Absolute moves. ; Load in next extruder T[next_extruder] ; Select next material. G91 ; Relative moves. G1 E105 F2000 ; Quickly load next material 95%. G1 E5 F2000 ; Slowly load last 5%. G90 ; Absolute moves. This will require: * 2x M3 screws (main assembly) * 2x M3 screws (main assembly) * 5x locking nuts or regular nuts * 2x M3 screws (fan duct)