User's Manual

DOC08010 Rev. A (DRAFT 1) 7–3
Stratasys P750K User Guide
Figure 7-1: Balco WaterJet Cleaning Unit
Toȱcleanȱaȱmodelȱusingȱthisȱdevice,ȱyouȱplaceȱitȱinȱtheȱchamber,ȱandȱyouȱ
manipulateȱitȱandȱtheȱjetȱusingȱtheȱbuiltȬin,ȱwaterproofȱsleeves.ȱAȱpumpȱ
turnsȱordinaryȱtapȱwaterȱintoȱaȱhighȬpressureȱjet,ȱandȱaȱwiperȱkeepsȱtheȱ
windowȱclear.
Removing Support
Material with
Caustic Soda
Soakȱmodelsȱinȱaȱ1Ȭpercent
ȱsolutionȱofȱcausticȱsodaȱ(sodiumȱhydroxide)ȱtoȱ
removeȱsupportȱmaterialȱfromȱdifficultȬtoȬreachȱareasȱandȱtoȱgiveȱtheȱ
modelȱaȱsmooth,ȱcleanȱfinish.ȱTheȱamountȱofȱtimeȱyouȱsoakȱtheȱmodelȱinȱtheȱ
solutionȱdependsȱonȱhowȱdelicateȱitȱisȱandȱhowȱmuchȱsupportȱmaterialȱ
needsȱtoȱbeȱremoved,ȱ
butȱitȱisȱtypicallyȱbetweenȱhalfȬanȬhourȱandȱseveralȱ
hours.ȱInȱanyȱcase,ȱyouȱshouldȱremoveȱasȱmuchȱsupportȱmaterialȱasȱ
possibleȱbeforeȱtheȱcausticȱsodaȱtreatment,ȱandȱrinseȱtheȱmodelȱthoroughlyȱ
(withȱaȱwaterȱjet)ȱafterwards.ȱ
Use caution when cleaning delicate models with high-pressure water systems.
WARNING: Caustic soda may cause chemical burns, scarring and
blindness. Mixing it with water generates heat that could ignite other
materials. Never pour water into a caustic soda solution. When diluting
the solution, always add caustic soda to water. Take adequate safety
precautions; always use nitrile gloves when handling caustic soda and
models soaked in it.