Ultimaker S5 Material Station, Инструкция по установке и эксплуатации, Страница: 66 / 68

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7.3 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 5.2 Materials).
• Recalibrate by using the detailed active leveling mode (see chapter 5.8 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. 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 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 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.