Objet Connex500 - Connex Print Head Replacement

Operating & Maintaining the Connex500/350 3-D Printer
7–40 DOC-13000 Rev. E
Replacing
Print Heads
Theconditionoftheprintheadsdirectlyaffectsthequalityofprinted
models.Youneedtoreplaceaprintheadifoneormoreofthefollowing
symptomsoccurs:
• TheHeadOptimizationwizarddeterminesthatoneormoreprint
headsaredefective.(See“CalibratingPrintHeads”onpage 34.)
• Therearenoticeablegroovesinthesurfaceofprintedmodels.
• Visualinspectionoftheheadrevealsthatitssurfaceisdamaged—
peelingorbubblesinthenozzlearea.
• TheConnexinterfacedisplaysawarningormalfunctionmessage
relatingtoaprinthead—
 HeadHeatertemperaturetimeout
 HeadHeaterthermistoropen
 HeadHeaterthermistorshort
TheHeadOptimizationwizardguidesyouthroughtheprocedureof
replacingaprinthead,andadjustscomponentsoftheConnexprinterto
enableyoutoperformit.Onlyreplaceaprintheadwiththeaidofthe
wizard.Theproceduretakes75—90minutes,andconsistsofthefollowing
phas
es:
A. Identifyingthehead(s)needingreplacement.
ThisisnormallydonebytheHeadOptimizationwizard.Otherwise,
evidenceofphysicaldamagetotheheadsurfaceoramalfunction
messageindicateswhichheadneedsreplacing.
B. Preparingtheprintblockforheadreplacement.
Thisisdoneautomaticallywhenyourunthewizard.
C. Removingthedefectiveprinthead
.
D. Installinganewprinthead.
E. Optimizingtheprintheads(doneautomaticallybythewizard).
F. Performingheadalignment.
To replace a print head:
1. Prepare—
• replacementprinthead(s)
• isopropanol(IPA—isopropylalcohol)orethanol(ethylalcohol)
• disposablesafetygloves(includedintheheadreplacementkit)
• anObjet‐suppliedcleaningclothorequivalent
• aflat‐headscrewdriver(5mm)
• thescalesuppliedbyObjetforuseintheWeightTest
Note: Make sure that you have these items before running the wizard.
2. StarttheHeadOptimizationwizardfromtheOptionsmenuofthe
printerinterface(seefigure 7‐48onpage 35).
3. Intheopeningwizardscreen,clickNexttobegin.
Replacing print heads is expensive. Replace them only after consulting with
an Objet-authorized customer-support engineer.
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