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steady state while spooling. At which point the puller wheel speed and fan speed will constantly adapt to
changes in output and disturbances to the system to maintain consistent filament diameter.
Note: For best results, close the door to the UI to avoid any cross-wind affecting your filament output - i.e.
if a cross-wind cools the filament at the nozzle too quickly, the puller wheel won’t be able to draw-down
the filament to its desired final diameter.
9. And there we have it! You are now off to the races and creating your very own filament!
If connected to a computer, now is a good time to check how your diameter sensors are doing. In particular,
your nozzle sensor alignment may need tweaking. Depending on the rate of output, you may find that your
filament is a little high or low relative to the diameter sensor. From the alignment process, the nozzle sensor
is positioned approximately half way in its range of motion. Figure 18 shows ideal light sensor positioning.
Notice the two troughs (representing the shadow of the filament) are relatively centred without falling off
to either side. Whereas in Figure 19 we see the filament is too far off one side of the sensor for the nozzle
sensor. If you find that your filament shadow is too far off one side that the sensor can no longer see the
full “width” (diameter) of the filament’s shadow, we can fix this by adjusting the height of the light sensor.
Using the thumb screw in the UI (Figure 11 for reference), loosen and adjust the height of the photoresistor
so the shadow is centred within the range of measurement similar to Figure 18. When you have achieved
this positioning, tighten the thumbscrew to fix position.
Figure 18: Nozzle Diameter Sensor raw data ideal reading example.
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