To understand the example, you can download the 3D models from Thingiverse. If not, you should activate it for two-color printing. For more information, see What Is a Wipe Wall or Ooze Shield? Also check under Dual Extruder whether the Ooze Shield is activated. If necessary, you can still activate the support and select the extruder for the support structure. In the Cura settings, make sure that Wall Extruder, Outer Wall Extruder and Inner Wall Extruder are set to Not overridden. Now select the desired quality profile with the desired layer height. If, for example, you can no longer see details due to the black color, you can change the visual representation in the preview after slicing via the color scheme or preview type without this affecting the G-code. The color representation also seems to depend on the operating system. Unfortunately, Cura cannot display the colors correctly. The model should now look similar to the desired print result. Select the desired material in the desired color for the left and right extruder. Now align the merged model on the platform. If the 3D models had the correct origin, then the models should now be correctly assembled. Now select "Merge Models" with the right mouse button or press CTRL + ALT + G. In our example you can click on "Select all models" with the right mouse button or press CTRL + A. Select now the two models that go together. Now select the model that is to be printed with the right extruder and select the corresponding extruder again with the right mouse button or press CTRL + 2. Right mouse click on "Extruder Left" or press CTRL + 1. Load the two models in Cura as shown in the picture above. Select the 3D model that you want to print with the extruder on the left. The materials then do not adhere properly to one another, but the "interlocking" means that the components cannot be separated. Some incompatible materials can also be connected to one another if a form fit was taken into account in the design. When making your selection, however, you should ensure that the materials can be printed in the same temperature range. Most of the time it works if you use the same type of material from different manufacturers. You get the best compatibility if you use the same types of material from the same manufacturer and only the colors differ. The two materials must therefore be compatible. In order for the example to lie, the materials must adhere to one another or fuse with one another. The base body and frame with the font are each saved in an STL file and are correctly positioned on top of one another if both are installed on the coordinate origin. The main body should be black and the frame and the font should form the color accent over silver. In our example we want to print a front cover in two colors. It is best if the XY plane corresponds to the bed contact surface. To print a 3D object with two colors, a separate 3D model must be available for each color, in which the origin of the coordinates is identical. In addition, the coordinate system must not be somewhere in the room, but should be aligned with one or more edges of the 3D model. Requirement for the use of a dual extruder with two colours Without deactivation, the settings of the hot bed may be changed by the selected material! If you only use one nozzle from the printer, then you should deactivate the second. For the x40 Cummunity materials, you will find information on the permissible temperature in the material description. Only required if the support material is in contact with the build bed. Water-soluble support material can only be used up to a certain temperature, so it must be checked before printing whether the heating bed has not been set too high by the printing material from the left extruder. The temperature of the print bed is the same for both. With a dual extruder, the nozzle temperature and printing speed can be set for each nozzle. Since the Weedo X40 with firmware 1.2.5 does not cope well with this, you should always set Skirt, Brim or Raft. In dual mode, if you set the Build Plate Adhesion setting to None, the printer always starts with the right extruder.
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