Taz 5 Multi Filament Hot End Assembly Remix

thingiverse

This project is ongoing, with some parts still under development. A combination of two hot end assemblies has been created: the original Taz 5 Assembly and the Prusa MK2 MMU multi-filament hotend. The result is a quad bowden setup that feeds into one hotend. By utilizing Prusa's Stepper motor multiplexer, you can convert E0 stepper signals into E0-E3, enabling multicolor (4 Color) printing without relying on pause, unload, reload, and resume techniques. As shown here: http://shop.prusa3d.com/en/printer-upgrades/118-original-prusa-i3-mk2-multi-material-upgrade.html This hotend assembly requires: 1.75mm E3D V6 bowden style all metal hotend 3 X M3 (5mm x 5mm OD) Brass threaded inserts 5 X M3 x 15mm Hex Head Screws 1 X M3 x 30mm Hex Head Screws 3 X M3 Square Nuts Small length of PTFE tubing to mate Y-Splitter to E3D V6 hotend Additional hardware is needed for assembly, including metal insert tubes and brass threaded inserts for the y-splitter assembly, as well as parts related to the hot end cooling fan and active cooling fan. However, these have not been sourced yet. EDIT: Further research has revealed that the hotend is a specially modified version of the E3D V6, featuring a unique heatbreak tubing with a 1.9mm ID and flared ends to reshape retracted filament. The steel tubes used in this assembly are 1.85mm ID, aiding in cooling the filament after retraction and preventing sticking. Work is ongoing to develop modified mounts for the extruder motors. Once completed, printable parts for the conversion will be added. Likely additional requirements include: Prusa's Super Switch board, which converts RAMBo's E0 stepper signals into a signal that drives steppers 1-4 Modified Prusa Firmware, tailored for Taz's bed size and thermistors P.I.N.D.A sensor for bed leveling and correction of all three axes (X, Y, Z), including out-of-square corrections Additionally, between the bed heater and borosilicate glass, there are 9 round copper sensor points distributed on the bed for axis correction. Probe coordinates will need to be edited in firmware to accommodate the larger bed size.