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step O
and O
is O
often O
net-shaped O
. O
In O
most O
cases O
, O
no O
finishing B-MANP
operation E-MANP
is O
applied O
to O
change O
the O
dimensions S-FEAT
of O
the O
product O
, O
apart O
from O
a O
reduction S-CONPRI
of O
the O
superficial O
roughness S-PRO
through O
sandblasting O
or O
polishing S-MANP
. O
Therefore O
, O
knowing O
the O
dimensional B-CHAR
tolerance E-CHAR
of O
AM B-MANP
processes E-MANP
in O
advance O
is O
of O
fundamental O
importance O
, O
but O
little O
information O
is O
currently O
available O
in O
the O
literature O
. O
A O
benchmarking O
analysis O
of O
three O
different O
AM S-MANP
systems O
for O
polymers S-MATE
is O
presented O
in O
this O
paper O
. O
The O
compared O
machines S-MACEQ
are O
based O
on O
different O
AM B-MANP
techniques E-MANP
which O
are O
fused B-MANP
filament I-MANP
fabrication E-MANP