User's Manual

Table Of Contents
DOC-24000 Rev. A 3–3
Alaris30 User Guide
TheObjetsoftwarearrangesthejobsitreceivesaccordingtotheirpriorities,
modelmaterialtype,andotherfactors.Inmultiworkstation
configurations,theoperatoroftheserver—typicallytheproduction
administrator—hastotalcontroloverthejobssenttothe3Dprinter,and
canprioritizeanddeletejobs,reviewjobhistoryandreprintajob
,andso
on.
Source Files
Alaris3Dprintingsystemsproducethreedimensionalmodelsdesigned
withmost3DCADtoolsandwithotherjobspecific3Dapplications.
Alarissystemsaccept:
STLfiles
SLCfiles
Alarissystemsfeaturethecapabilityofproducingbothtypesofmodelfiles
simultaneously.
STL Files
STLisshortforStandardTriangulationLanguage.Thislanguageviewsany
objectasacollectionofsurfaces,anddescribeseachsurfaceoftheobjectas
acollectionoftriangles.
Forexample,asquarecanbedescribedastwotriangles;acube(six
squares)as12triangles.Curvedsurfacesneedmoretrianglestodescrib
e
them.Thehigherthetolerance(forsmoothsurfaces),themoretrianglesare
needed.Theresultisthathighqualityobjectdescriptionsmeanveryheavy
files.
MostCADsoftwarecanexportSTLfiles.TheAlarissystemutilizesthese
filesforbuildingmodels(rapidprototyping),andalsofordirectlymaking
mo
ldsformassproducingitems.
STLfilesareASCII(text)files.Thecontentofeachfilebeginswith“solid”
andendswith“endsolid”(bothlowercase).Betweenthesekeywordsisa
listofthetrianglesthatdescribesthefacesofthesolidmodel.Eachtriangle
definesasinglenormalvectordirectedaw
ayfromthesolid’ssurface,
followedbyitsXYZcoordinates.TheseareexpressedasCartesian
coordinatesandarefloatingpointvalues.Thecoordinatesofalltriangles
shouldbepositiveandshouldfallwithinthevolumeofthemodel.
SLC Files
SLCisshortforStereoLithographyContour.SLCfilesdescribetwo
dimensionalcontoursofthethreedimensionalmodels.Thesecontourlines
arepolylines.
SLCfilesareASCII(text)filesthatsavemodelsasaseriesofslices.This
meansthatmodelsbasedonSLCfilescannotbeorientated;onlytheirscale
(size)andpositiononthebuildtraycanbecontrolled.Fo
rthisreason,the
model’sorientationmustbesuitableforproductionbeforeitissavedasan
SLCfile.BecauseofthenatureofSLCfiles,theappearanceofmodelsin
ObjetStudiomaybedifferentthanthesolidobjectimagesdi
splayedfrom
STLfiles.
DRAFT 4 - July 11, 2010