The last step of the calibration will be setting up Cura and defining the X/Y offset. The X/Y offset is the exact distance in the X and Y direction between the two hot ends.
- Start Cura and make sure the Ultimaker Original is selected in the Machine menu.
- Go to Machine > Machine settings and set the Extruder count to 2 and click Ok to confirm.
- Navigate again to the Machine settings; you should now see Extruder 2 with X offset and Y offset at the bottom. Check if the X offset is set to 0 and Y offset is 21.6.
Note: If you don't see Extruder 2 in the machine menu, first restart Cura.
The X and Y offset values in Cura are average values, but can be different for your Ultimaker. Therefore a dual extrusion calibration print must be done to define the exact offsets.
- Load a dual extrusion calibration model in Cura. Dual extrusion models usually exist of two files which means that you have to load both.
- Right-click on one of the models and select Dual extrusion merge. The two models will now be merged into one object.
Note: Both models have a different color in Cura. The yellow one will be printed with the first hot end and the red model with the second hot end.
- Let Cura slice the model, save it to the SD card and place the SD card in your Ultimaker.
- Load two spools of filament on your Ultimaker. Take two different colors so you can easily check the X/Y offset later on.
- Start the print.
- When the print is finished, check if there are small gaps between the two colors or if there is too much overlap on some places.
- Go to Cura and change the X offset and Y offset accordingly. A higher value means that the distance between the nozzles in the X or Y direction is bigger than the default values; a lower values means that the distance is smaller.
- Do another calibration print and repeat the process until you have found the correct X and Y offset.