Filament
The BCN3D Sigma printer gives the best printing results
with PLA and ABS from Colorfila in a 3 mm plastic fila-
ment format, although it accepts many other materials.
A brief description of the materials currently used by
the printer is given below:
PLA
PLA (polylactic acid) is by far and away the best material
for 3D printing, since it is easy to shape using FFF. This
is the recommended option when you first start 3D
printing, and is suitable for the printing requirements
of the majority of applications in most cases. It comes
in a wide range of colours, and will allow you to print
complex shapes easily. The finish is slightly glossy or
semi-matte.
When printing the operating temperature oscillates
from between 195º C to 220º C, depending on the
supplier and printing speed. Printing overhangs is easier
if a layer fan is used. It has a very high adhesion to the
printing surface, and if the temperature of the heating
bed is 45º C - 55º C no other adhesion product is requi-
red, although it’s recomended.
It has average mechanical properties, although it be-
comes slightly brittle when printing irregularly-shaped
objects. At operating temperatures of 50º C or more,
the mechanical properties and rigidity of the objects
may decrease. It dissolves in caustic soda.
ABS
ABS (acrylonitrile butadiene styrene) is one of the most
widely used materials in 3D printing, and is more sui-
table for some types of printing than PLA. Printing with
ABS is more complex, and requires a certain amount of
care: it is not recommended for non-experienced users.
It comes in a very wide range of colours, and the finish
is semi-matte or matte.
32 User Manual
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