When doing dual extrusion there are many way to go about it. The basic requirements are that you have a board that supports 2 Extruder connections, 2 hotend connections, and 2 hotend thermistor connections. However if you are using a 2 into 1 adapter you only need a board that has 2 extruder connections. We are going to go over what you need for each setup and the pros and cons of each. Personally we prefer the 2 into 1 setup due to it’s ease of use but they all have their advantages and disadvantages.


Easiest – 2 into 1 Setup

  • Pros
    • Use existing bowden style hotend
    • No leveling multiple nozzles
    • No print area lost
    • Fast setup – only need to wire and mount the second E motor
    • No nozzle leakage since it is one nozzle
  • Cons
    • Cannot use filaments with wide temperature differences
    • Needs a purge tower

STL Files:


Intermediate – Dual Independent Nozzles

  • Pros
    • Independent nozzles for 2 completely different temperatures
    • Utilize different nozzle sizes on each block
  • Cons
    • Need to run power and thermistor wires for additional nozzle setup
    • Needs specific mount for the hotend(s)
    • You lose buildspace on the X on EACH SIDE equal to the distance between the 2 nozzles
      • So if you have a nozzle offset of 30mm you will lose 30mm on the left and 30mm on the right of your X printable area
    • 2nd idle nozzle can leak while printing and drip on the print

STL Files:


Advanced – Mixing Nozzle

  • Pros
    • No leveling multiple nozzles
    • No print area lost
    • No nozzle leakage since it is one nozzle
    • Mix multiple materials and/or colors to create unique prints with unique properties
      • Example – Mixing 2 colors to get one OR Mixing PLA with PETG
  • Cons
    • Needs specific mount for the hotend
    • You MUST always have 2 filaments loaded to prevent back feeding up the idle extruder input
    • Difficult to configure in slicer, not all slicers support mixing
      • But can be handled like the 2 into 1
    • Needs a purge tower

STL Files:


Slicer Setup

Cura

Dual Extrusion Profile (based on the CR-X): Download


Simplify3D

2 into 1 Adapter CR-10 Profile Baseline: Download

Dual Hotend CR-10 Profile Baseline: Download

*NEW* "Rausch Dual Hotend S3D Profile Example Prints - https://twitter.com/Racush/status/1036019267970334720 


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