Print quality issues
Poor build plate adhesion
When you experience problems with the adhesion of a print to the build plate, the following actions can be performed:
- Ensure that the correct material settings and adhesion method were used refer to the Materials section).
- Recalibrate by using the detailed active leveling mode (Refer to the build plate calibration section).
- Check the Ultimaker Cura settings that were used, and try printing with one of the default Ultimaker Cura profiles.
Grinding PVA
Typically incorrect handling or storage of the material can lead to grinding of the material. PVA should be printed and stored at a low humidity to avoid problems while printing. We advise a humidity below 50 % for storage and below 55 % while printing. It is also recommended to keep the ambient temperature below 28 °C while printing. In a standard air conditioned office, this humidity and temperature should be easy to achieve.
When PVA is ground down by the feeder, there are three main causes.
Incorrect storage
PVA is a material that absorbs moisture relatively easily and therefore storing it correctly (resealable bag, with humidity below 50%) is important. If PVA absorbs too much moisture it will get soft and malleable/pliable and in some cases even sticky. This can cause problems in the feeder as it might not be able to forward the PVA properly anymore. If this happens you can dry the PVA.Coated Bowden tube
The Bowden tube can get coated on the inside due to incorrect printing conditions (mainly high humidity). If the humidity of the printing environment is too high (above 55%) and temperature is too high (above 28 °C) PVA might not be able to move easily through the Bowden tube. A solution for this is to clean the Bowden tube and dry it.Clogged print core
High humidity can affect PVA quality, and lead to clogs in the print core. As a consequence, filament might get jammed, causing grinding in the feeder. When this happens, the print core should be cleaned by following the procedure described in chapter 6.11 Clean print cores.For more information on how to resolve grinding issues, you can take a look at this page.
Under-extrusion
In simple terms, under-extrusion is when the printer is unable to supply a sufficient amount of material. Your Ultimaker S5 is under extruding when you see missing layers, very thin layers, or layers that have random dots and holes in them.
Under-extrusion can have several causes:
- Use of low quality material (diameter inconsistency) or wrong settings
- Feeder tension not set correctly
- Friction in the Bowden tube
- Small particles of material in the feeder or Bowden tube
- A partial clog in the print core
If your Ultimaker S5 is affected by under–extrusion, it is advised to take a look at this page for detailed troubleshooting instructions.

Warping
Warping occurs due to material shrinkage while printing, causing the corners of the print to lift and detach from the build plate. When plastics are printed, they firstly expand slightly but contract as they cool down. If material contracts too much, this causes the print to bend upwards from the build plate.
When your print is warping, check the following:
- Use the active leveling to level the build plate
- Ensure the correct adhesion method is used
- Use the correct temperature and other settings as in the default Ultimaker Cura profiles
- Adjust the shape of your model according to the design guidelines described in our 3D model assistant
- Use another material that is less prone to warping

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Ultimaker S5
- Get started
- Operation
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Maintenance
- Update the firmware
- Material handling and storage
- Maintenance schedule
- Clean the printer
- Lubricate the axles
- Check for play on the axles
- Check the tension of the short belts
- Check for debris in the front fan of the print head
- Check the quality of the nozzle cover
- Lubricate the Z screw of the Z motor
- Clean the feeders
- Clean the print cores
- Lubricate the feeder gear
- Replace the Bowden tubes
- Clean the system fans
- Lubricate the hinges
- Troubleshooting
- Downloads
- More support
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Ultimaker 3
- Get started
- Operation
-
Maintenance
- Updating the firmware
- Storage and handling of materials
- Maintenance schedule
- Clean the printer
- Lubricate the axles
- Check for play on axles
- Check the tension of the short belts
- Check for residue in the front fan of the print head
- Check the quality of the silicone nozzle cover
- Lubricate the lead screw of the Z motor
- Clean the print cores
- Clean the feeders
- Replace the Bowden tubes
- Troubleshooting
- Downloads
- FAQ
- More support
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Ultimaker 2+
- Get started
- Operation
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Maintenance
- Updating the firmware
- Build plate calibration
- Storage and handling of materials
- Hardware maintenance
- Clean the printer
- Lubricate the axles
- Check for play on axles
- Check tension of short belts
- Lubricate the lead screw of the Z motor
- Retighten the hot-end isolator
- Clean the feeder and replace the Bowden tube
- Troubleshooting
- Downloads
- More support
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Ultimaker Original+
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Assembly
- Assembly
- What's in the box?
- Preparing the panels
- Assembling the frame
- Attaching various parts
- Sliding blocks
- Attaching the caps
- X and Y axles
- Z stage assembly
- Z stage installation
- Print head assembly
- Print head installation
- Aligning the print head
- Feeder assembly
- Bowden tube
- Spool holder
- UltiController
- Mounting the main board
- Connecting
- Electronics cover
- First use
- Printing
- Maintenance
- Troubleshooting
- Additional information
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Assembly