Load material into the build unit7
In order to print, you need material in the build unit.
Loading procedure
Follow these steps to load material into the build unit.
1. Ensure that the build unit is located on the processing station.
2. Ensure that the build unit printing platform is clean.
3. If you want to change the mix ratio, HP recommends cleaning the build unit first. See Empty the
material from the build unit on page 60.
NOTE: If you do not clean the build unit, it will contain some remaining material with the previous
mix r
atio. In fact, some of the previous material may remain even after cleaning, so you may prefer
to use a different build unit. Check the material compatibility specifications.
Table 7-1 Recommended mix ratios
Material Reusable proportion
HP and Certified Polyamide 12 ≤ 80%
HP and Certified Polyamide 11 ≤ 70%
TPU Ultrasint ≤ 80%
HP 3D HR PP ≤ 80%
In some exceptional cases you may want to change this ratio; for example, when using the
pr
ocessing station for the first time you may need to use 100% fresh material.
4. If you want to change to a different type of material, you should first clean and then purge the
processing station, or clean it manually. See
Change to a different type of material on page 54.
NOTE: If you do not intend to change the type of material, you may sometimes decide to clean the
pr
ocessing station without purging it, perhaps because you think there is a problem with the
particular material that you have been using. See
Clean the processing station on page 283.
CAUTION: A small amount of material may remain after cleaning. If your new material cannot
t
olerate any contamination at all, you should clean the processing station manually. Contact your
service representative if you are not trained to do this yourself.
5. Ensure that the material cartridges are loaded.
6. At the front panel, tap Build unit > Load.
7. Clean the sieve when requested by the front panel. See Clean the sieve on page 278.
8. Clean the loading nozzle sensor. See Clean the loading nozzle sensor on page 280.
Load material into the build unit 49
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