Multi-Extrusion system for Scalar 3D Printer

thingiverse

Description These parts make Scalar 3D printers compatible with dual extrusion, using a "Y" like converter. Dual extrusion is made possible by this system based on the idea from distechautomation's Prometheus Hotend, which provides a dual extrusion system using one single hotend. The idea was then taken back by Prusa Research and improved to a 4-color system using a multiplexer board. This multiplexer board makes it possible to use this system with four extruders using a standard Ramps 1.4 board and a single stepper motor driver! We redesigned the system for a simple two-extruder system so that it can fit our Scalar 3D printers. Compatibility These parts are only compatible with 1.75mm filament right now. It was tested using an E3D Lite hotend. What You Need You will need two Pneufit connectors (http://3dmodularsystems.com/en/mechanical/223-m6-push-to-fit-pneufit-connector-for-4mm-od-ptfe-tubes-compatible-with-175mm-filament.html), two PTFE tubes for 1.75mm filament (length depends on where you place your extruders) (http://3dmodularsystems.com/en/mechanical/152-black-ptfe-tube-for-3mm-3d-printer-filament.html), a few Thermoplastic Screws (M3x8 and M3x16), a few M6x12 and Tnuts for extruder holders on extrusion profiles, one extra extruder, and one drive gear. How It Works The filament converges into one single output. So your extruder pushes one filament into the hot end, then during color change the current filament will fully be retracted from the hot end and the second filament will be pushed into the hot end. You might need to apply more than 100mm of retraction so that the filament is fully extracted from the tubing system into the Y plastic parts. You will need to insert the tubes from extruder into the "Y" plastic parts up to the middle of it. On the exit, you need to make sure that the PTFE tube that goes inside the hotend is also entering the exit of the "Y" plastic part (there is a special groove for it). Also, make sure the PTFE tube coming from the hotend is grooved with some conic tool (a crew driver or something similar) in order to create an entering cone into the PTFE tube. About the provided holder, it should fit on top of the hot end mount from Scalar 3D printers. Existing Multi-Color Units Here's a cool one using five colors: https://www.thingiverse.com/thing:2403517 thanks to sportssedan for sharing! 3D Modular Systems Evolutive 3D Printers You enjoy it and want to help us with a donation: https://www.paypal.me/3DMS http://www.3dmodularsystems.com Twitter: https://twitter.com/3dmodularsystem Youtube: http://www.youtube.com/c/3DModularSystems3DPrinters