FABtotum Personal Fabricator, User Manual

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FABtotum Complete Manual
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bottom as it sinks the object into the platform. This feature should be used to avoid for the object to detach from the
plane.
TRAVEL SPEED: This parameter sets the speed at which the head moves when not printing. Suggested values for
this are between 100mm/s, to 200mm/s.
(500mm/s is the maximum we tried but this causes a lot of noise and may slowly destroy the machine if used for
longer periods of time).
BOTTOM LAYER SPEED: It is important that the bottom layer is printed at a slower speed to allow it stick better
to the bed, be aware that the bottom layer is the most important layer of all. We advise you set this at 25.
INFILL SPEED: This is the speed at which the infill parts are printed. When set to 0 the machine will use the print
speed for the infill. The higher the speed, the faster the print. A faster print will, however, create a lower quality
print, but if we consider it’s inside, unless you have specific needs, it can be somehow faster.
TOP/BOTTOM SPEED: This is the speed at which the top and bottom layers are printed. When set to 0, the
machine will use print speed for them. We suggest you don’t print these layers too fast, as printing at a faster pace
reduces printing time, but significantly decreases quality.
OUTER SHELL SPEED: This parameter corresponds to the speed in which the outer shell is printed. Printing it at
a lower speed will improve the final skin quality, however too much difference between infill speed and outer shell
speed can negatively affect printing quality. We advise to set this at 75.
INNER SHELL SPEED: This is the speed at which the inner shell is printed. This should be set at an average
speed between the outer shell speed and infill/printing speed. If set to 0, printing speed will be used for the inner
shell.
MINIMAL LAYER TIME: This feature sets the minimum time spent for a layer to cool down, before the next layer
is put on top. We advise to set it to 6.
ENABLE COOLING FAN: This feature is essential especially during faster prints as it provides extra cooling.
If you are an expert you can also work with even more advanced settings. This is achieved in Cura by going to →
EXPERT → Open EXPERT Settings
VOLUMETRIC SPEED (Volumetric Flow Rate): A good way of understanding your parameters is calculating
volumetric speed. This is the number of cubic millimeters the unit is extruding every second.
You can calculate it as per below:
LAYER HEIGHT (mm) x NOZZLE SIZE (mm) x PRINT SPEED (mm/s) = VOLUMETRIC SPEED (mm3/s)
You can change the temperature according to this speed (more volumetric speed, higher temperature) and the
maximum volumetric speed of the material you are using.
RETRACTION MM AND SPEED: Our machine is limited to maximum 18 mm/s in retraction speed, so you can
stick to this value. As for retraction length, a good value to use it around 6mm (just change at maximum 1-2mm,
small changes in this case can be useful).
Parts with a lot of retraction can damage the filament, till it breaks, so it’s better to increase the fill of the part to
get the filament to advance more during the print, hence the next retraction will be on a new filament segment.