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• WhydidIlookbeyondPLA/ABS?• WhatdidtheInternethavetosayaboutPETG?
• MyexperiencewithPETG
11/21/16 2
WhynotPLA/ABS?
• Actually,theyarebothpreRygoodandeachhasit’sstrongcharacteris-cs.
• But…– PLA:briRle,limitedtemperaturerange– ABS:fumes,warping,delamina-on
• RumorhaditthatPETGhadmuchofthegoodquali-esofPLA/ABSwithlessofthebadones.
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InternetSays(PETG)
• WhatisPETG?– Amixtureof(P)oly(E)thylene(T)erephthalateand(G)lycol.
– PETisthemostcommonlyusedplas-cintheworld(thinkplas-cboRles).
– Glycolmakesthecopolyestermoredurable.
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InternetSays(PETG)
• Strengths– Verydurable,moresothanPLAorABS– Fairlyflexible– Fairlyeasytoprint(oncese^ngsaredialedin)– Printswithoutodor– Verylowshrinkageandvirtuallynowarping– Don’tabsolutelyneedaheatedbed
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InternetSays(PETG)
• Strengths(cont.)– Temperatureresistance(lesssothanABSthough)– Excellentinter-layeradhesion– Goodchemicalresistance– Glossyfinish(couldalsobeaweakness:-P)– Verygoodformakingreplacementparts– Foodsafe??
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InternetSays(PETG)
• Weaknesses– Canbestringy/oozyands-cky– Notverygoodatbridging– Recommendedtoprintslowertogetgoodqualityprints
– SoeerthanPLA/ABSsoitmayscratcheasier– Chemicalresistancemakessmoothing/cleaningharder
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InternetSays(PETG)
• RandomProper-es– Extrusiontemp:230–265°C– Glasstransi-ontemp:~88°C– DenserthanPLAorABS
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MyexperiencewithPETG
• 3DPrinter:WanhaoDuplicatorI3rev2.1• Findingdecentdefaultprintse^ngs– Hot-end:245°C– Heatedbed:80°C(layer1),60°C(aeer)– Printcoolingfan:Off(layer1),50%(aeer)– .2mmlayers– SameprintspeedsasIwasusingforPLA(40mm/s)
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MyexperiencewithPETG
• Observa-ons– Needtotake-metoexperimentwithhot-end,heatedbed,fan,retrac-on,etc.togetdecentqualityprints.MoresothanwithPLA.
– DefinitelymoreofanissuewithbridgingthanPLA.Higherhot-endtemphelpsalongwithhigherfan.
– Blobbingandclumpingonnozzlecanalsobeanissue.
– Resultscanbequitegoodifse^ngsaredialedin.
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MyexperiencewithPETG
• Testprints:bridging
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MyexperiencewithPETG
• Testprints:retrac-on
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MyexperiencewithPETG
• Testprints:nega-vespace
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MyexperiencewithPETG
• Testprints:dimensionalaccuracy
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MyexperiencewithPETG
• Testprints:mixed
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MyexperiencewithPETG
• Testprints(cont.)
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MyexperiencewithPETG
• Testprints(cont.)
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