User's Manual

Operating & Maintaining the Stratasys P750K 3D Printer
6–42 DOC08010 Rev. A (DRAFT 1)
Toȱreplaceȱprintȱheads,ȱyouȱneedȱtheseȱtoolsȱandȱmaterials:
• replacementȱprintȱhead(s)
• isopropanolȱ(IPA—isopropylȱalcohol)ȱorȱethanolȱ(ethylȱalcohol)
• disposableȱcleaningȱglovesȱ(suppliedȱwithȱtheȱprintȱhead;ȱorȱuseȱ
anyȱclean,ȱpowderȬfreeȱprotectiveȱgloves)
• aȱsuppliedȱcleaningȱclothȱorȱequivalent
• aȱmirror
• aȱ5ȱmmȱflatȬheadȱscrewdriverȱorȱaȱ3ȱmmȱhexȱ(Allen
®
)ȱkey,ȱ
dependingȱonȱtheȱtypeȱofȱprintȱblock
• theȱscaleȱsuppliedȱforȱuseȱinȱtheȱHeadȱOptimizationȱwizardȱ(Weightȱ
Test)
• theȱMissingȱNozzlesȱruler
Ifȱyouȱareȱreplacingȱprintȱheadsȱnow,ȱtheȱwizardȱguidesȱyouȱthroughȱtheȱ
procedureȱwhenȱyouȱclickȱNext.ȱContinueȱwithȱ“PreparingȱtheȱPrint Block”ȱ
onȱpage 44.
Replacing
Print Heads
Theȱconditionȱofȱtheȱprintȱheadsȱdirectlyȱaffectsȱtheȱqualityȱofȱprintedȱ
models.ȱYouȱmayȱneedȱtoȱreplaceȱaȱprintȱheadȱifȱoneȱorȱmoreȱofȱtheȱ
followingȱsymptomsȱoccurs:
• TheȱHeadȱOptimizationȱwizardȱdeterminesȱthatȱaȱprintȱheadȱisȱ
defective.ȱ(Seeȱ“Optimizingȱ(Calibrating)ȱPrintȱHeads”ȱonȱpage 35.)
• Thereȱareȱnoticeableȱgroovesȱinȱtheȱsurfaceȱofȱprintedȱmodels.
• Visualȱinspectionȱofȱtheȱheadȱrevealsȱthatȱitsȱsurfaceȱisȱdamaged—
peelingȱorȱbubblesȱinȱtheȱnozzleȱarea.
• Theȱprinterȱinterfaceȱdisplaysȱaȱwarningȱorȱmalfunctionȱmessageȱ
relatingȱtoȱaȱprintȱhead—
 HeadȱHeaterȱtemperatureȱtimeout
 HeadȱHeaterȱthermistorȱopen
 HeadȱHeaterȱthermistorȱshort
Replace print heads only after consulting with an authorized customer-
support engineer.