User's Manual
Table Of Contents
- About This Guide
- Safety
- Introducing the Alaris 3-D Printing System
- Installing Objet Software
- Using Objet Studio
- Using Job Manager
- Operating & Maintaining the Alaris30 3-D Printer
- Starting the Alaris30 Printer
- Loading Model and Support Cartridges
- Producing Models
- Resuming Production After Printing has Stopped
- Changing the Model Material
- Keeping the Alaris Printer in Idle Mode
- Shutting Down the Alaris Printer
- Maintaining the Alaris Printer
- Routine Maintenance Schedule
- Cleaning the Print Heads
- Pattern Test
- Improving Print Quality
- Cleaning and Replacing the Wiper
- Cleaning and Replacing the Roller Waste Collector
- Aligning the Print Heads
- Replacing Print Heads
- Calibrating the Load Cells
- Replacing the Odor Filter
- Replacing the UV Lamp
- Replacing the Waste Container
- Cleaning the Exterior Panels
- Backing-Up and Restoring Printer Settings
- ReInitiate Wizard
- Handling Printed Models
Operating & Maintaining the Alaris30 3-D Printer
7–34
DOC-24000 Rev. A
Replacing
Print Heads
Theconditionoftheprintheads directlyaffectsthequalityofprinted
models.Youneedtoreplaceaprintheadifoneormoreofthefollowing
symptomsoccurs:
• Therearenoticeablegroovesinthesurfaceofprintedmodels.
• Thepatterntestrevealsthatmorethanfourconsecutivenozzles—ora
totalofmorethan12nozzles—arenotfunctioning.
• Visualinspectionoftheheadrevealsthatitssurfaceisdamaged—
peelingorbubblesinthenozzlearea.
• TheAlarisinterfacedisplaysawarningormalfunctionmessage
relatingtoaprinthead—
HeadHeatertemperaturetimeout
HeadHeaterthermistoropen
HeadHeaterthermistorshort
• Testsrevealthatthematerialprintedbyaprintheadisunderweight
(thatis,notenoughmaterialisbeingoutputted).
Note: Weight tests are performed only by an authorized service engineer.
Awizardguidesyouthroughtheprocedureofreplacingaprinthead,and
adjustscomponentsoftheAlarisprintertoenableyoutoperformit.Only
replaceaprintheadwiththeaidofthewizard.Theproceduretakesabout
75minutes,andconsistsofthefollowingphases:
A. Identifyingthehead(s)n
eedingreplacement.
Thisisusuallydonebyexaminingtheresultsofthepatterntest,after
attemptingallothermeansforimprovingprintquality(see
“ImprovingPrintQuality”onpage 7‐24).Otherwise,evidenceof
physicaldamagetotheheadsurfaceoramalfunctionmessage
indicateswhichheadneedsreplacing.
B. Preparingtheprintblockforheadreplacement.
Thisisdoneautomaticallywhenyo
uruntheHeadReplacement
wizard.
C. Removingthedefectiveprinthead.
D. Installinganewprinthead.
E. Performingweightcalibration.
Thewizardprintsasample.Afterweighingitonascale,youenterthe
weightinthewizarddialogbox.
F. Performingheadalignment.
Replacing print heads is expensive. Replace them only after attempting all
other means for improving print quality (see “Improving Print Quality” on
page 7-24) and after consulting with an Objet-authorized customer-support
engineer.
DRAFT 4 - July 11, 2010