Ultimaker Ultimaker S5 Pro Bundle, Installation And User Manual

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Ultimaker S5 Pro Bundle user manual 46
6.3 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 (see chapter 4.2 Materials)
• Recalibrate by using the detailed active leveling mode (see chapter 4.7 Calibration)
• 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.
Keep the PVA in the Material Station and ensure the door remains closed to ensure a relative humidity of <40%.
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 very well
• 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 5.12
For more information on how to resolve grinding issues, you can take a look the Ultimaker website
for further assistance.
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 our online resource pages for
detailed troubleshooting instructions.