Thursday, April 16, 2015

The Diamond Hotend - Single nozzle multi-color 3D printing

An affordable 3D printer single nozzle hotend that provides a faster, easier and more precise method of color 3D printing

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This is one of the most innovative and ways to add multicolor printing to a 3D printer with one print head. They have already surpassed their funding goal and I have a feeling they are going to go much higher! 

About this project

Reliable multi-color and multi-material 3D printing

At we are constantly thinking about how we can improve 3D printers and 3D printing technologies. As we see it, the next step for 3D printers is reliable multi-color and multi material printing.
That is why we started development on The Diamond Hotend.
Benefits of The Diamond Hotend
  • Easy calibration
  • Better precision
  • Prints with 3 different colors or materials
  • Color blending
  • Minimal filament waste
Today multi-color 3D printing with regular single nozzle hotends is possible but require you to fuse the filaments together before printing. This process is time-consuming and color changes are difficult to time and can only be made in the horizontal plane.
Dual-hotend solutions are faster and offer better control but entails a different set of problems. 
First, you will need to align the height of the nozzles. If one nozzle is just a tiny bit lower than the other, it can damage your print.
Next, you will need to calibrate the position of the nozzles in relation to each other. If you don’t calibrate the nozzles correctly, the colors will be overlapping on one side and gaping on the other side. Another major problem with dual-hotend printing is filament oozing from idle nozzles, causing a messy print job.

Introducing The Diamond Hotend

The Diamond Hotend is a single nozzle hotend for 3D printing in multiple colors that requires a minimum of calibration. It allows you to time exactly when and where the color changes and eliminates the problem with oozing nozzles.
It allows you to feed three different types of filaments through one nozzle and provides a faster, easier and more precise method of 3D printing, at an affordable price with minimal filament waste.

This Diamond Hotend in the company of Julia Vase #002 - Yin Yang by Virtox and other 3D prints - Please click for more info
This Diamond Hotend in the company of Julia Vase #002 - Yin Yang by Virtox and other 3D prints - Please click for more info

Features of The Diamond Hotend

The key feature of The Diamond Hotend is the diamond shaped nozzle. We have designed the nozzle to have smallest possible mixing chamber, to make color shifts as fast as possible and to avoid unnecessary filament waste. To ensure rapid nozzle heat up we have constructed the nozzle as compact as possible.

The diamond shaped nozzle
The diamond shaped nozzle
Right from the beginning of this project, we wanted to create a top-shelf product. That is why we have chosen to incorporate heat sinks and heat breaks from E3D Online into the design ofThe Diamond Hotend.
The E3D Online products represent a proven technology and are widely recognized as the best on the market. Furthermore, we have an ongoing business relationship with E3D Online and know the company to be a reliable supplier.
At this time, we have developed mounting brackets and the necessary hardware and firmware upgrades for the bq Prusa i3 and bq  Witbox 3D printers. However, the design of the mounting brackets can easily be modified to fit most 3D printers on the market. All relevant files for printing the mounting brackets can be downloaded from Thingiverse.

The bq Witbox and bq Prusa i3 mounting brackets
The bq Witbox and bq Prusa i3 mounting brackets
We hope that the 3D printing community will collaborate with us in modifying the mounting brackets to fit other 3D printers and encourage everyone to share their bracket designs with us. Any new bracket designs shared with us will be made available for download from our webpage.
The Diamond Hotend prints with 1.75mm filament and we have tested it with a variety of filaments including PLA, ABS, HIPS, FLEX, and PETG with excellent results.

Firmware and hardware upgrades

The Diamond Hotend requires a motherboard that supports tripple extruders. We recommend using the RUMBA motherboard for its easy firmware setup and triple extruder support. 
Adapting your existing firmware for use with the Diamond Hotend is easy and only require you to do minor changes.
You can choose to purge the mixing chamber as infill by printing the infill before the outer perimeters, or apply prime towers to purge the mixing chamber with every filament shift. This technique ensures crystal clear printout colors.
We have found Repetier Host to be excellent for preparing triple color prints, because it has proven to work reliably with prime towers.
Please go to the wiki for further information on how to install The Diamond Hotendor join the Diamond Hotend Facebook group.

Help us bring reliable multi-color and multi-material printing to the 3D community

For the last six months, we have spent several hundred hours designing, building and testing multiple generations of prototypes. Our development is now complete and we are ready for production.
All we need now is your help to finalize the project.
With your support, we can produce the first real batch of Diamond Hotends and bring reliable multi-color and multi-material printing to the 3D printing community.
Please back our project and share it with your 3D printing friends.
Thank you for your interest and support

  You can Download our new app; I am A Backer and follow IamABacker on TwitterFacebook, or RSS to be notified of any updates.


  1. It is good to know that we can now even print the shape of the things which we like to see on our smart devices, thanks for sharing this printer!

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