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m_kramar

Where is dual extruder option in Cura

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What Cura version do you have?

I just installed the Cura v3.5 Beta version and the option is there to configure up to 8 extruders, and then for each extruder the X and Y offset. Go to the 'Manage printers' menu. Select your printer and then click the 'Machine settings' button.

 

I looked into the Cura manual at https://ultimaker.com/en/resources/52029-manage-printers

and there I see the menu item for adding extruders is missing. So it might be a recent configuration addition.

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Nope.

The offsets are the values you have to add to the gcode coordinates to get the nozzle at the desired position.

So, when the gcode says to go to position 0,0 then the values for the first nozzle are commonly configured as x=0 and y=0. For the second nozzle you then enter offsets so that the nozzle gets located at exact that same position. You can measure these values as the distance from center of nozzle 1 to center of nozzle 2.

 

Cura uses these values to calculate the allowed build volume, i.e. you have the printer's volume size but on some printers not all nozzles can reach all same physical locations. From that you can conclude the values are for most printers just an indicational value and it doesn't matter if you are off by a millimeter. Except... there are some printer brands where the gcode contains absolute positions for each head and then these settings affect the generated gcode positions (not true for Ultimaker machines where the nozzle offset is configured in the printer).

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