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Dual Extrusion

    Assigning Objects for Dual Extrusion

    Setting things to build using two extruders is super simple in the MakerBot Desktop App. All you have to do is place your STLs or OBJs in the configuration in which you want them to build, and assign each one to the extruder you want to build it. ** Note: Dual Extrusion is not available for MakerBot Print you will have to use the MakerBot Desktop software.

    You might want to start by setting display colors for your two extruders. You can choose colors just to help you differentiate between objects in the Prepare screen, or you can match the extruder colors to the actual filament you will be printing things with. Open the Edit menu at the top of the screen and choose App Settings. Or, on a Mac, go to MakerBot and choose Preferences. Select your colors and click Save.

    To assign an object or part of an object to an extruder, click on it to highlight it. Then click the Object Information button at the lower left of the Prepare screen or use the O key to open the Object Information menu. If you don't see the Object Information button, check the Devices menu at the top of your screen; the Object Information button will not appear unless a printer with dual extruders, such as the MakerBot Replicator 2X, is selected under Devices.

    Use the drop-down menu in the Object Information menu to select which extruder you want to print the selected object or object part. 


    Dual Extrusion Slicing Options

    When you click on Settings, you will see a few special options for dealing with dual extrusion prints. First, choose which material is loaded into each extruder. Different materials will require different settings. Next, choose whether you want your object to print with rafts and/or supports.

    With dual extrusion, you have more raft and support options than just turning them on and off. Click on Settings > Custom Tab > Multi-Material Printing to choose from these options:

    • Use Support Material Extruder to have the raft or supports printed only using the left or right extruder. 0 is the right extruder and 1 is the left extruder.
    • Select Mixed Material Support to have the materials of your rafts and supports determined automatically. If you are printing a single-material object, the raft and supports will automatically be printed with the same extruder. If you are printing a dual material object, the raft and supports will be built from both materials so that each portion of your object will only touch raft or support structures of the same color.
    • Select Mixed Material Raft to print a mixed material raft, where each part of the model rests on a section of raft printed in the same material.

    Dual Extrusion Examples


    You can access our dual extrusion example files by going to File > Examples > Dual Extrusion.

    A Dual Color Print with Overhangs

    Use the Object Information menu to assign each object to the correct extruder. When each object is assigned to the extruder you want it to be printed by, click the Settings button.

    Enable both Mixed Material Support and Mixed Material Raft in the Custom Settings. Then make your other settings changes and print or export your file. MakerBot Desktop will automatically arrange your raft and support structures so that any given part of your object will only touch raft or supports of the same color.

    A Dual Color Print with No Overhangs

    Use the Object Information menu to assign each object on the build plate to the correct extruder. When each object is assigned to the extruder you want it to be printed by, click the Settings button.

    Enable Mixed Material Raft and switch Supports to Off. Then make your other settings changes and print or export your file. MakerBot Desktop will automatically arrange your raft so that any given part of your object will only touch raft of the same color. 

    A Single Color Print

    Use the Object Information menu to assign the object on the build plate to whichever extruder you like. Then click the Settings Button.

    Enable Raft Material Extruder. If your object does not have overhangs, set Supports to Off. If it does, enable Mixed Material Support. Then make your other settings changes and print or export your file. MakerBot Desktop will automatically print your raft and, if you're using them, your support structures in the same material as your object.


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