HP Designjet 3D Service Manual page 81

Figure 45: Filament Present Switch location
Support side Filament Present Switch
6. Obtain a can of compressed air.
7. Insert the canned air extension tube to its spray nozzle.
8. Align the canned air extension tube with the entrance hole of the Fila-
ment Present Switch. See
Figure 46: Cleaning the Filament Present Switch
9. Squeeze the spray nozzle for one quick burst (approximately 2 seconds)
to clear each Filament Present Switch on the model and support sides of
the material bay. If an optional material bay is installed, repeat this pro-
cedure for the second bay.
10. Reconnect the material tubes to the rear of the material bay(s).
1 1. Replace the material carriers and load material.
Model side Filament Present Switch
Figure 46.
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