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Print cores
Changing print cores
Print cores can be changed easily on the Ultimaker 3 by using the procedure from the menu. Besides changing a print core
you also have the option to only load or unload a print core.
1. Go to the menu Material/PrintCore
g
PrintCore 1 or 2
g
Change.
2. Wait for the print core to heat up, reverse material and cool down again.
3. Open the print head fan bracket.
4. Remove the print core carefully by squeezing the levers and sliding the print core out of the print head.
5. Insert the new print core in the print head.
6. Close the print head fan bracket.
7. Wait for the Ultimaker 3 to load the material into the print core and cool down again.
Do not touch the chip on the back side of the print core with your hands.
Make sure you keep the print core completely vertical while removing or installing it so it will smoothly slide out
of/into the print head.
Calibrating the print cores
When a new combination of print cores is installed some calibration is required to align both nozzles. The Ultimaker 3 will
automatically detect new combinations and gives a message to do the calibration. This calibration must only be done once;
after this, the information is stored on the printer. The AA print core that was installed on receipt of the Ultimaker 3 has
already been calibrated with the other two print cores and does not require calibration.
To do the calibration you will need the XY calibration sheet, which you can find in the accessory box or download here.
If you need to print it, make sure you print it on an A4 paper at 100% scale.
Ensure 2 print cores and materials are installed before starting the calibration.
To start the calibration:
1. Go to System
g
Maintenance
g
Calibration
g
Calibrate XY offset.
2. The Ultimaker 3 will now print a grid structure on the build plate. Wait until it is finished.
3. Once the Ultimaker 3 has cooled down, remove the glass plate from the printer and place it on the XY calibration
sheet. Ensure the printed grid it is exactly placed on the two rectangles on the sheet.
4. Find the aligned lines on the printed X grid and look which number belongs to these lines. Enter this number as
the X offset value on your Ultimaker 3.
5. Find the aligned lines on the printed Y grid and look which number belongs to these lines. Enter this number as
the Y offset value on your Ultimaker 3.
It is important that the printed XY offset print adheres well to the build plate and shows no signs of under
extrusion. If it does, it is recommended to re-do the calibration print.
