XY calibration on the Ultimaker 3

The Ultimaker 3 and Ultimaker 3 Extended use two print cores in the print head. These print cores have a vertical and a horizontal offset. The vertical offset (Z direction) is set during build plate leveling, and the horizontal distance (X and Y direction) is stored via an XY calibration process.

The print cores that are supplied with the Ultimaker 3 are already calibrated. When you install a new combination, the printer will notify you via a prompt on the display. For the best results, perform the XY offset calibration before starting a dual extrusion print. This calibration only needs to be performed once for each combination; the printer stores this calibration information internally.

Requirements

For the XY calibration, the Ultimaker 3 will run a short print with both cores, after which the user is asked to select the printed lines with the best alignment. The XY calibration will take about 10 minutes.

You will need the XY calibration sheet, which was included in the accessory box. If you no longer have this sheet, you can download it here. Print this file on an A4 paper at 100% scale.

Note: Ensure two print cores and two materials are installed before starting the calibration.

Instructions

Perform the steps below for the Ultimaker 3 XY calibration:

Start calibration In the Ultimaker 3 menu, go to System - Maintenance - Calibration - Calibrate XY offset. The Ultimaker 3 will now print a grid structure on the build plate. Wait until it is finished.
Align the grid

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 is exactly placed on the two rectangles on the sheet.

Find X offset In the X grid, find the two lines which align best. On the calibration sheet, check which number belongs to these lines. Use the button to enter this number in the Ultimaker 3 as the X offset value.
Find Y offset In the Y grid, find the two lines which align best. On the calibration sheet, check which number belongs to these lines. Use the button to enter this number in the Ultimaker 3 as the Y offset value.
Complete calibration Complete the XY calibration and place the glass plate back into the printer. Close the build plate clamps at the front to secure it.
XY_Offset1.jfif XY_Offset2.jfif

Carefully remove the glass plate

Align the grid with the XY calibration sheet

Note: It is important that the printed XY offset print adheres well to the build plate and shows no signs of under-extrusion. If there are print quality issues that make it difficult to find the aligned lines, it is recommended to repeat the calibration print. If necessary, first relevel the build plate or clean the print cores to improve the print quality.

Tip: If you are in doubt between two values, you can also enter 0.5 values in the printer menu. For example, if you are unsure whether the lines for '1' or '2' are aligned best, enter '1.5' as the offset value.

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