Calibrating The Level Gap

Leveling the print jet nozzles is very important to ensure quality prints especially after replacing a print jet, an extruder assembly or the print pad.

The Print Jet Level Gap calibration files require cartridges to be installed in each cartridge bay.

NOTE: Ensure the file used matches the material type installed in cartridge bay 1. (Ex. If cartridge bay 1 has an PLA material cartridge, print the PLA Level Gap file. If cartridge bay 1 has PLA and cartridge bay 2 has INF, select the appropriate filename that matches the materials you have installed.)

These files are available at www.3dsystems.com/shop/cubepro/downloads. You can download the files here:

Calibration Files

Level Gap Calibration Print Overview

The following diagram illustrates a leveled print pad with a proper Z-Gap:

Z-Gap - The Z-Gap is the distance between the print pad and the print jet nozzles.
Print Pad Level - The Print Pad Level is a measurement to determine if the print pad is level with the print jet nozzles.

Printing the Level Gap Calibration File

NOTE: Ensure the print pad is completely clean from glue and printed parts before beginning this procedure.

  1. Download the CALIBRATION FILES and extract them to your computer’s hard drive.
  2. Navigate to the file location and copy the appropriate file to your USB mass storage device.
  3. Insert the USB mass storage device into the USB host port on the printer.
  4. Select PRINT.

  1. Using the arrows, navigate to the Level Gap Calibration file and select PRINT.

NOTE: There are two Level Gap Calibration files as well as four Nozzle Offset Calibration files. The two Level Gap Calibration files are print material specific. Select the file based on the material cartridge type installed in cartridge bay 1.

  1. Apply two thin layers of Cube Glue to the print pad in an area of 50 mm x 50 mm. Select the checkmark to continue.

NOTE: For more information, refer to the section titled Applying Cube Glue.

NOTE: It may take several minutes to print the file.

  1. When finished, remove the print pad and verify the Level Gap.

NOTE: Refer to the sections titled Reading The Z-Gap Calibration Print and Reading The Print Pad Level Calibration Print.

NOTE: If any adjustments are needed, perform this procedure again after making the adjustments. Make sure all glue and plastic residues have been removed prior to performing this procedure again.

Adjustment Knob Measurement

Adjusting the level plate adjustment knob should initially be performed in 1-step increments. If a finer adjustment becomes necessary, adjust the knobs in 1/2 step increments.

In the following illustration, the measurement between 1 and 2 is considered 1-step.

Adjusting the Z-Gap

The Z-Gap should be within specifications before adjusting the Level Gap. If adjustments to the Z-Gap are necessary, perform the adjustments and then print the calibration file again to verify the correct Z-Gap. A correct Z-Gap is indicated when there is no gap in the Closed Z-Gap measurement and there is a gap in the Open Z-Gap measurement.

NOTE: The Closed Z-Gap (A) and the Open Z-Gap (B) are two different measurements but should be read together.


Correct Closed Z-Gap

Referring to the illustration, the Closed Z-Gap bars (B) should touch the baseline (A).

Incorrect Closed Z-Gap

If there is a gap (B) between the Closed Z-Gap bars and the baseline (A), turn all three print pad adjustment knobs counter-clockwise (left) 1-step and then print the file again to verify the lines touch. If the lines do not touch on the second print, adjust the knobs again 1-step and reprint the file. Continue to do this until the lines meet.


Correct Open Z-Gap

If there is a gap (B) between the Open Z-Gap bars (C) and the baseline (A) and there is no gap between the Closed Z-Gap bars and the baseline, the Z-Gap is correct.

Incorrect Open Z-Gap

If there is no gap (B) between the Open Z-Gap bars (C) and the baseline (A), turn all three (3) print pad adjustment knobs clockwise (right) 1-step and print the file again to verify that the lines do not touch. If they touch on the second print, adjust all three (3) print pad adjustment knobs clockwise (right) 1-step and reprint the file. Continue this procedure until there is a gap.


Reading the Print Pad Level Calibration Print

Correct Print Pad Level

The Print Pad Level is correct when each of the four (4) corner calibration points have no gaps between the Print Pad Level calibration lines and the baselines.

NOTE: Before making any adjustments to the Print Pad Level, the Z-Gap must be correct.

Incorrect Print Pad Level

In the illustration, there is an incorrect gap between the Print Pad Level calibration lines and the baselines on the front of the print pad and no gap between the Print Pad Level calibration lines and the baselines on the back of the print pad. The front of the print pad needs to be raised.
To correct the Print Pad Level in this instance, turn the front print pad adjuster knob counter-clockwise (left) 1-step. Reprint the file and verify that all four corner calibration points are correct.

Acceptable Print Pattern

The Print Pad Level calibration file should print with no gap between the Print Pad Level calibration lines and the baselines. The illustration indicates an acceptable print pattern from a profile view.


Unacceptable Print Patterns

If the gap between the print pad and the print jet nozzles is too small, the Print Pad Level calibration lines will press in and scrape the baseline. If all four corner calibration points appear like the pressed profile illustration (A), turn the three (3) print pad adjuster knobs clockwise (right) 1-step to increase the gap. Reprint the Print Pad Level calibration print again.

If there is a gap between the Print Pad Level calibration lines and the baselines like the illustration (B), turn the three (3) print pad adjuster knobs counter-clockwise (left) 1-step to decrease the gap. Reprint the Level Gap calibration print.

NOTE: Once all four corner Print Pad Level calibration points are correct, verify the Z-Gap to ensure that it is still correct.