Prusa Research Original Prusa i3 MK2 kit User manual

Brand: Prusa Research

Model: Original Prusa i3 MK2 kit

Type: User manual

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Pleasealwaysrefertothehttp://www.prusa3d.com/drivers/

foranupdatedversionofthis3Dprintinghandbook(PDFdownload).

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QUICK GUIDE TO THE FIRST PRINT

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1.Readthesafetyinstructionscarefully(page7)

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2.Placetheprinteronaflatandstablesurface(page11)

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3.Downloadandinstallthedrivers(page31)

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4.Calibratetheprinterbyfollowingourcalibrationflow(page11)

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5.InsertSDintotheprinterandprintyourfirstmodel(page24)

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Handbookversion1.04fromAugust8,2016.©PrusaResearchs.r.o.

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About the author

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JosefPrusa(bornFeb23rd,1990)becameinterestedinthe3Dprintingphenomenonbefore

joiningthePrague’sUniversityofEconomicsin2009atfirstitwasahobby,anew

technologyopentochangesandimprovements.Thehobbysoonbecameapassionand

JosefgrewintooneoftheleadingdevelopersofAdrienBowyer’sinternational,opensource,

RepRapproject.Today,youcanseethePrusadesignindifferentversionsallaroundthe

world,itisoneofthemostpopularprintersandthankstoit,knowledgeaboutthe3Dprinting

technologysignificantlyincreasedamongpublic.



Jo’sworkonselfreplicatingprinters(youcanprinttheotherprinterpartswithyourprinter)

arestillongoingandcurrentlythereisPrusai3thethirditerationoftheoriginal3Dprinter.It

isconstantlyupdatedwiththelatestinnovationsandyou'vejustpurchaseditslatestversion.

Inadditiontoprinterhardwareupgrades,themaingoalistomakethetechnologymore

accessibleandunderstandableforallusers.

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JosefPrusaalsoorganizesworkshopsforthepublic,participatesinprofessional

conferencesdedicatedtothepopularizationof3Dprinting.Forexample,helecturedatthe

TEDxconferenceinPragueandVienna,atWorldMakerFaireinNewYork,MakerFairein

RomeorattheOpenHardwareSummithostedbyMIT.JosefalsoteachesArduinoat

CharlesUniversityandwasalsoalecturerattheAcademyofArtsinPrague.

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Inhisownwords,heimagines3Dprinterswillbeavailableineveryhomeinanottoodistant

future.Ifanythingisneeded,youcansimplyprintit.Inthisfield,youjustpushthe

boundarieseveryday...We'regladyou'repartofitwithus!

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Table of contents

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Abouttheauthor 3

2Productdetails 6

3Introduction 6

3.1Glossary 6

3.2Disclaimer 7

3.3Safetyinstructions 7

3.4Licenses 7

4OriginalPrusai3MK2printer 8

5OriginalPrusai3MK2printerkit 9

6Firststeps 10

6.1Printerunpackingandproperhandling 10

6.2Printerassembly 11

6.3Setupbeforeprinting 11

6.3.1Calibrationflow 11

6.3.2PEIprintsurfacepreparation 12

6.3.3Increasingtheadhesion 13

6.3.4Selftest(kitonly) 13

6.3.4.1Selftesterrormessagesandresolution(kitonly) 14

6.3.5CalibrateXYZ(kitonly) 14

6.3.5.1CalibrateXYZerrormessagesandresolution(kitonly) 15

6.3.5.1Yaxisalignment(kitonly) 18

6.3.6CalibrateZ 18

6.3.7Meshbedlevelling 19

6.3.8Loadingthefilamentintotheextruder 20

6.3.8.1Unloadingthefilament 21

6.3.9Firstlayercalibration(kitonly) 21

6.3.9.1Bedlevelcorrection(kitonly) 22

6.3.10Finetuningthefirstlayer 22

6.3.10.1Printprusalogo 22

6.3.10.2Checkprobeheight(kitonly) 23

6.3.11Securingoftheprobe(kitonly) 23

7Printing 24

7.1Removingobjectsfromtheprinter. 24

7.2PrinterControl 25

7.2.1LCDscreen 25

7.2.2Printstatistics 25

7.2.2Silentvs.Hipowermode 26

7.2.3Factoryreset 26

7.2.4LCDlayout 26

7.2.5Printspeedversusprintquality 28

7.2.6USBcableandPronterface 28

7.3Printeraddons 30

7.3.1Differentnozzles 31

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7.3.1.1Hardenedsteelnozzle 31

7.3.1.20.25mmnozzle 31

8Printerdrivers 31

9Printingyourownmodels 31

9.1Whereyoucangetthe3Dmodels? 31

9.2Inwhatprogramyoucancreateyourownmodels? 32

9.3Slic3r 32

9.4Bundled3Dmodels 33

9.5PrintincolorwithColorPrint 34

9.6Printingofnonstandardmodels 36

9.6.1Printingwithsupportmaterial 36

9.6.2Largeobjectprinting 37

10Materials 38

10.1ABS 38

10.2PLA 38

10.3PET 38

10.4HIPS 38

10.5PP 38

10.6Nylon(TaulmanBridge) 38

10.7Flex 39

10.8Dialinginnewmaterials 39

11FAQPrintermaintenanceandprintissues 40

11.1Printsurfacepreparation 40

11.2Clogged/jammedextruder 40

11.3Nozzlecleaning 41

11.4Replacing/changingthenozzle 41

11.5Axisfluency 42

11.5Printingproblems 43

11.5.1LayersbreakandsplitwhenprintingfromABSmaterial 43

11.5.2Modelscontaineithertoomuchornotenoughofthefilament 43

11.6Problemswithfinishedmodels 43

11.6.1Modelbreaksand/oriseasilydamaged 43

12FAQcommonissueswhenassemblingtheprinterkit 44

12.1Nozzle/printsurfacegapisgreaterinthemiddlethanatthecorners 44

12.2Printerstopsprintingsoonafterstart 45

12.3Printercan’treadSDcard 45

12.4LooseXand/orYaxisbelts 46

12.5Detachedcablestotheheatbed 47

12.6Looseheatbedzipties 47

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Importantnotice,tip,hintorinformationthathelpsyouprintwithease.

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Readcarefully!Thispartoftexthasuppermostimportanceeitherforusersafetyof

foraproperprinterservice.

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Thissymbolindicatestextrelatedtoprinterkitonly.

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2 Product details

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Title:OriginalPrusai3MK2/OriginalPrusai3MK2(kit),Filament:1.75mm

Manufacturer:PrusaResearchs.r.o.,621/8aPrvnihopluku,Prague,18600,CzechRepublic

Contacts:phone+420222263718,email:[email protected]

EEEgroup:3(ITand/ortelecommunicationequipment),Deviceuse:indooronly

Powersupply:90135VAC,2A/180264VAC,1A(5060Hz)

Workingtemperaturerange:18°C(PLA)38°C,indooruseonly

Workinghumidity:85%orless

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Kitweight(brutto/netto):9.8kg/6.3kg,assembledprinterweight(brutto/netto):12kg/

6.3kg.Serialnumberislocatedontheprintercontrolunitandalsoonthepackaging.

3 Introduction

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Thankyouforpurchasingouroriginal3DprinterOriginalPrusai3MK2fromJosefPrusa

eitherasanassembledprinteroraprinterkitasyourpurchasesupportsuswithitsfurther

development.Readthehandbookcarefully,please,allchapterscontainvaluableinfoforthe

correctserviceoftheprinter.



Pleasecheckthehttp://prusa3d.com/driverspageforupdatedversionofthis3D

printinghanbook(PDFdownload).



Incaseofanyprinterrelatedproblemdonothesitatetocontactusatinfo@prusa3d.com



.We

aregladtoreceiveallyourvaluablecommentsandtips.Westronglysuggestyoutovisitour

officialforumatforum.prusa3d.com,whereyoucanfindsolutionstocommonissues,tips,

adviceandhintsinadditiontoactualinformationabouttheOriginalPrusai3printer’s

development.

3.1 Glossary

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Bed,Heatbed,PrintbedCommonlyusedtermforprintingpadaheatedareaof3D

printerwhere3Dobjectsareprinted.

ExtruderPrintingheadorextruderisapartofaprinterconsistingofanozzle,hobbed

pulley,idlerandanozzlefan.

FilamentTermforplasticprovidedonspooliscalled“filament”,it’susedthroughoutthis

handbookaswellasintheLCDmenuontheprinter.

Heater,Hotendothernameforaprintingnozzle.

1.753Dprintersusetwodifferentdiameters(thickness)ofafilament(thickness):2.85mm

(commonlycalledas3mm)and1.75mm.1.75mmversionismoreusedworldwidethough

thereisnodifferenceinprintingquality.

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3.2 Disclaimer

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FailuretoreadtheManualmayleadtopersonalinjury,inferiorresultsordamagetothe3D

printer.Alwaysensurethatanyonewhooperatesthe3Dprinterknowsandunderstandsthe

contentsoftheManual.Wecannotcontroltheconditionsinwhichyouassemblethe

OriginalPrusai3.Forthisandotherreasonswedonotassumeresponsibilityandexpressly

disclaimliabilityforloss,injuries,damage,orexpensearisingoutoforinanywayconnected

withtheassembly,handling,storage,useordisposaloftheproduct.Theinformationinthis

Manualisprovidedwithoutanywarranty,expressorimplied,regardingitscorrectness.

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3.3 Safety instructions

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Pleasebeverycautiousduringanyinteractionwiththeprinter.Thisprinterisan

electricaldevicewithmovingpartsandhottemperatureareas.



1.Deviceisforindooruseonly.Donotexposetheprintertorainorsnow.Alwayskeepthe

printerinadryenvironmentataminimumdistanceof30cmfromotherobjects.

2.Alwaysplacetheprinteronastableplace,whereitcannotfallortipover.

3.Theprintersupplyishouseholdpoweroutlet230VAC,50Hzor110VAC/60Hz;Never

connecttheprintertoadifferentpowersupply,itmaycausemalfunctionordamagetothe

printer.

4.Placethepowercordsoyoucan’tstumbleonit,orsteponitorotherwiseexposetoany

damage.Makesurethatthepowercordisnotmechanicallyorotherwisedamaged.Stop

usingdamagedcableimmediatelyandreplaceit.

5.Whenyoudisconnectthepowercordfromthesocket,pulltheplugratherthanthecordto

reducetheriskofdamagetoplugorACoutlet.

6.Neverdisassembletheprinterpowersupply,itdoesnotcontainanypartsthatcouldbe

repairedbyanunskilledworker.Allrepairsmustbeprovidedbyaqualifiedtechnician.

7.Donottouchthenozzleorheatbedwhentheprinterisprintingoriswarmingup.Note

thatthetemperatureofthenozzleis210300°C(410572°F);heatbedtemperaturecan

reachover100°C(212°F).Temperaturesabove40°C(104°F)cancauseharmtohuman

body.

8.Donotreachinsidetheprinterwhileitisstillinoperation.Aninjurymaybecausedbyits

movingparts.

9.Preventchildrenfromunsupervisedaccesstotheprinterevenwhentheprinterisnot

printing.

10.Donotleavetheprinterunattendedwhileit'sstillon!

11.Plasticisbeingmeltedduringprintingwhichproducesodors.Setuptheprintersome

placewellventilated.



3.4 Licenses



OriginalPrusai3MK2printerisapartoftheRepRapproject,thefirstopensource3Dprinter

projectfreetouseunderaGNUGPLv3license(www.gnu.org/licenses/gpl3.0.en.html).If

youimproveoralteranypartofaprinterandyouarewillingtosell,thenyouhavetopublish

thesourcecodesunderthesamelicense.All3Dprintedelementsoftheprinterthatcanbe

improveduponcanbefoundathttp://www.prusa3d.com/prusai3printableparts/.



4 Original Prusa i3 MK2 printer



Unliketheprinterkit,it’scompletelyassembledandalmostreadytoprint.Afterpluggingin

andrunningthenecessarycalibrationyou,canprinta3Dobjectinthematterofminutes

afterunpackingtheprinter.Keepinmindyoucanuseoursupportemailwhenyou

purchasedtheassembledprinter.Donothesitatetowriteusifyouneedanyadviceorhelp.

Wewillgladlyhelpwithanyspecificprints.



3Dprintersusetwodifferentdiametersofafilament(youcanfindmoreinchapter

Materials



):2.85mmand1.75mm.1.75mmversionisusedmoreworldwide,though

thereisnodifferenceinprintingquality.Filamentisprovidedonaspoolwhereyou

canfindthebasicinformationfilamentmaker,material(ABS,PLA,etc.)andfilament

diameter.2.85mmfilamentiscommonlycalledas3mm.



Thisprintersupportsonlya1.75mmfilament.Pleasecheckthefilamentdiametertobe

1.75mmbeforeinsertingintotheextruder.Donottrytoinsertwiderfilamentitcoulddamage

theextruder.



Pict.1OriginalPrusai3MK2



printer



description



5 Original Prusa i3 MK2 printer kit



OriginalPrusai3MK2kitispicturedinpict.2.Detailedinformationandassembly

descriptioncanbefoundinchapter6.2Printerassembly.Weofferthesupportfor

userswhopurchasedtheprinterkitthroughourofficialforum.Ifyouneedhelpdo

nothesitatetovisitourforumatforum.prusa3d.com.Youcanfindtheanswersfor

yourproblemthere.Ifnot,pleasejustpostyourquestiondirectlythere.



Pict.2OriginalPrusai3MK2



printer



kitunboxed



6 First steps

6.1 Printer unpacking and proper handling



Holdingtheupperframe,taketheprinterandpullitoutfromthebox.Becarefulwhen

handlingtheprinternottodamagetheelectronicsandthustheproperprinterfunctionality.

Anytimeyoumovetheprinter,alwaysholdtheupperframewithhotbeduprightpointing

awayfromyouaspicturedinpict.3A.



Donotforgettoremoveallshippinghelpersparts

showninpic3Borthewhiteziptiesused.



Pict.3A



Proper



handlingofa



printer



Pict.3B



Donotforgettoremoveallshippinghelpersparts 



6.2 Printer assembly



WithOriginalPrusai3MK2printerkitwesuggesttofollowtheguidelinesand

assemblethekitaccordingtothetheonlinemanualatmanual.prusa3d.com.(Online

manualisavailableinseverallanguagesonthewebsite).Theconstructionofthe

printershouldnottakemorethanoneworkingday.Afterasuccessfulcompletion

continuetothechapter6.3Setupbeforeprinting.

6.3 Setup before printing



● Placetheprintertoahorizontallystableposition,bestplaceisaworkbenchwhere

thereisnoriskofdraft.

● Attachthefilamentholderstotheupperframe.

● AttachFilamenttotheholders.Makesurethefilamentspooldoesn’tjamandcan

movefreely.

● PlugintheACpowercord,checktomakesurethepropersettingforACvoltageis

selected(110V/220V)andturnontheswitch.

● Checkoutthefirmwareversion(intheSupportmenuviaLCDpanel)andifit’solder

than3.0.6,pleaseupgradetothelatestonefromourwebsite

http://www.prusa3d.com/drivers/otherwiseyouwon’tbeabletofollowournew

calibrationflow.Version3.0.6ispreinstalledonprintersshippedfromAugust9,

2016.



Filamentisacommontermfortheplasticrodmaterialprovidedonaspoolfrom

which3Dobjectsareprinted.



6.3.1 Calibration flow



6.3.2 PEI print surface preparation



Toachievethebestadhesiononthenewsurface,itisimportanttokeepthesurfaceclean.

Cleaningofthesurfaceisveryeasy.ThebestoptionisIsopropylalcoholavailablein

drugstoreswhichisthebestforABS,PLAandothers,exceptforPETGwheretheadhesion

maybetoostrong.Secondoptionistouseagentlesprayofawindowcleaner(Windexor

similar)onapapertowelandwipethesurface.Thebedcanbecleanedevenwhilehot,just

becarefulnottotouchthesurfaceorthenozzle.Alternatively,youcancleanthebedwith

warmwaterandafewdropsofadishsoaponapapertowel.Denaturedalcoholisyet

anotheroption.



Thesurfacedoesnothavetobecleanedbeforeeveryprint!Itisjustimportanttonot

touchtheprintbedwithyourhandsordirtytools.Cleanyourtoolswiththesame

solutionasyouwouldthebedandyouwillbeabletostartyournextprintrightaway.



Youcanleavesmallmarksontheprintsurfacewithyournozzleortools,theywilltypically

beshinierthantherest.Itdoesnotaffectthefunctionalityoradhesion.However,ifyouwant

tohavesamesurfacelookonthewholeprintbedyoucanresurfaceit.Theeasiestwayisto

takeahardsideofdrykitchenspongeandwipetheaffectedareawithcircularmotiongently

fewtimes.



TheindustrialgluewhichholdsthePEIsheetontheheatbeditselfsoftenswhen

temperaturesgreaterthan110°Careused.Ifhighertemperaturesareused,the

gluecanmigrateunderthePEIandcreateslightbumpsonthesurface.



6.3.3 Increasing the adhesion



Insomespecialoccasions,likeatallobjectwithaverysmallcontactareawiththeprint

surface,youmightneedtoincreasetheadhesion.FortunatelyPEIisaverychemically

resistantpolymerandyoucantemporaryapplyotheradhesionsolutionswithoutdamaging

it.

ThisalsoappliestomaterialswhichwouldnotsticktoPEIotherwise,likeNylonetc.



Beforeapplyinganythingtothebed,considerusingBrimoptioninSlic3rwhichincreases

thesurfaceareaofthefirstlayer.



ForPLAandNylonblendsasimplegluestickdoesthetrick.Gluecanbelatereasily

removedbywindowcleanerordishsoapwater.



ForABSprints,ABSjuicecanbeusedandlatercleanedwithpureacetone.Beverygentle

whenapplyingthejuiceanddosowhilethebediscold.Printswillattachverystrongly.



Preparedjuicecanbealsopurchasedinoureshop.Unfortunately,UPSservice

doesnotallowtodeliveranyacetonebasedproductsduetoshippingconstraints.In

thatcaseyougetonlythebottleandABSfromoureshopandyouhavetosource

theacetonelocally.



6.3.4 Selftest (kit only)



Thepurposeoftheselftestroutineistocheckmostcommonerrorswhenassemblingand

connectingelectronicsandtohelpindicateanypossibleerrorsafterassembly.Youcanrun

theSelftestfromCalibrationmenuonLCDpanel.Thisshouldnotbenecessaryonthe

assembledprintersasthosearepretested.



Initiatingthisroutineperformsaseriesoftests.Theprogressandresultsofeachstepare

displayedontheLCD.Incaseoferrorsfound,theselftestisinterruptedandthereasonfor

errorisshowntoguideusersintroubleshooting.



Testconsistsof

Heatbedandhotendproperwiring

XYZmotorsproperwiringandfunctionality

XYZendstopmechanicalsettingsandproperwiring.



6.3.4.1 Selftest error messages and resolution (kit only)



Heater/ThermistorNotconnected:

Checkproperwiringofhotendpowercablesandthermistorcables.Ensurethatboth

areproperlyconnectedtotheRamboelectronics,andthattheyarenotswapped.



Bed/HeaterWiringerror:

Checkthatheatbedandhotendpowercablesarenotswappedorthermistorcables

frombothhotendandheatbedarenotswappedintheRamboelectronics.



EndstopsWiringerror{XYZ}:

Checkthepropercablingofendstops.Routineindicatesaxisonwhichendstop

reportedmalfunctionorisnotproperlyresponding.Checktheproperconnectionin

theRamboelectronics.



Motor{XYZ}Endstop{XYZ}:

Checkthatmotorandendstoponindicatedaxisareproperlyconnectedtothe

Ramboelectronicsandnotswappedwithmotororendstopofdifferentaxis.Axis

causingtheproblemsisindicatedontheLCDpanel.



EndstopnothitMotor{XZY}:

Checkmechanicalsettingsthatendstopcanbereachedwhenaxisisinminimal

position.

6.3.5 Calibrate XYZ (kit only)



TheOriginalPrusai3MK2comeswithafullmeshbedlevelingfeature,however

forthistoworkweneedtofirstcalibratethedistancebetweentipofthenozzle

andP.I.N.D.A(PrusaINDuctionAutoleveling)probe.

Theprocessisfairlystraightforward,solet’sgettoit.Wealsosuggesttocheck

outourGuideforNewUserfirstatwww.prusa3d.com/buildvideomk2withcalibrationtips.



ThepurposeoftheX/Y/ZcalibrationroutineistomeasuretheskewoftheX/Y/Zaxesandto

findthepositionofthe9calibrationpointsontheprintbedfortheproperbedleveling.You

canruntheXYZcalibrationfromCalibrationmenuonLCDpanel.Thisshouldnotbe

necessaryontheassembledprintersasthosearefactorycalibrated.Besureyou’reusing

thefirmwareversion3.0.6orthelatestone!



Initiatingthisroutineperformsaseriesofmeasurementsinthreerounds:Inthefirstround,4

sensorpointsontheprintbedaresearchedforcarefullyastonottouchtheprintbedbythe

nozzle.Inthesecondround,all9sensorpointsarefound.Inthelastroundtheheightabove

the9sensorpointsismeasuredandstoredintoanonvolatilememoryforreference,this

finishedtheZaxiscalibration.



TheprogressandresultsofeachsteparedisplayedontheLCD.Incaseoferrorsfound,the

XYZcalibrationisinterruptedandthereasonforerrorisshowntoguideintroubleshooting.



AtthestartoftheXYZcalibrationproceduretheprinterpromptsyoubyafollowingmessage:

"CalibratingX/Y.MoveZcarriageuptotheendstoppers.Clickwhendone.”



Afterthat,theprinterasksyoutoconfirmthisstep:"AreleftandrightZcarriagesallup?"



PleasemakesureyoureallymovetheZcarriageuptotheendstoppersuntilyouheara

rattlingsoundastheZsteppermotorsskipsteps.Thisprocedureensures,that1)theXaxis

isperfectlyhorizontal,2)theprintnozzleisinaknowndistancefromtheprintbed.Incase

theZcarriagedidnottouchtheendstoppers,theprintercouldnotpossiblyknowtheheight

oftheprintnozzleabovetheprintbedanditcouldthereforecrashintotheprintbedduring

thefirstroundoftheX/Ycalibrationprocedure.



TheXYZcalibrationprocedurealsopromptsyouto"Pleasecleanthenozzlefor

calibration.Clickwhendone."



Ifthisadviceisnotfollowedandthereisaplasticdebrisontheprintnozzle,thenthedebris

maytouchtheprintbedorevenpushtheprintbedawayfromthePINDAprobe,sothe

PINDAprobewillnottriggerproperlyandthecalibrationwillfail.



Placeasheetofaregularofficepaper(forexamplethechecklist

shippedwitheveryorder)andholditunderthenozzleduringthefirst

round(first4pointsbeingchecked)ofcalibration.Ifthenozzlecatches

onthepaperduringtheprocess,powerofftheprinterandlowerthe

P.I.N.D.A.probeslightly.SeetheP.I.N.D.A.proberesponsediagramin

6.3.10.2Checkprobeheight.Thepaperwillnotaffectthecalibration

process.Thenozzlemustnottouchtheprintsurfaceordeflectthebed

byanymeans.Ifeverythingwentcorrectly,tightenthebottomnutofthe

probeoritcangetlooseduringprintinglater!



6.3.5.1 Calibrate XYZ errormessagesandresolution(kit only)



1) XYZcalibrationfailed.Bedcalibrationpointwasnotfound.



Calibrationroutinedidnotfindabedsensorpoint.Theprinterstopsclosetothebed

point,whichitfailedtodetect.Pleaseverify,thattheprinterisassembledcorrectly,

thatallaxesmovefreely,thepulleysdonotslipandtheprintnozzleisclean.If

everythinglooksgood,reruntheX/Ycalibrationandverifywithasheetofpaper

betweenthenozzleandtheprintbedthattheprintnozzledoesnottouchtheprint

bedduringthecalibrationroutine.Ifyoufeelafrictionofthenozzleagainstthesheet



ofpaperandthenozzleisclean,youneedtoscrewthePINDAprobeslightlylower

andreruntheX/Ycalibration.



2) XYZcalibrationfailed.Pleaseconsultthemanual.



Thecalibrationpointswerefoundinpositionsfarfromwhatshouldbeexpectedfora

properlyassembledprinter.Pleasefollowtheinstructionsofcase1).



3) XYZcalibrationok.X/Yaxesareperpendicular.



Congratulations,youbuiltyourprinterprecisely,yourX/Yaxesareperpendicular.



4) XYZcalibrationallright.X/Yaxesareslightlyskewed.



Goodjob,theX/Yaxesarenotpreciselyperpendicular,butstillquiteallright.The

firmwarewillcorrectfortheX/Yskewduringnormalprinting,soboxeswillbeprinted

withrightangles.



5) X/Yskewedseverely.Skewwillbecorrectedautomatically.



YoumayconsidertorealigntheX/Yaxes(asdescribedinthechapter6.3.5.1 Y

axis alignment).Stillthefirmwarewillcorrecttheskewduringnormalprintingandas

longastheXandYaxesmovefreely,theprinterwillprintcorrectly.



6) XYZcalibrationfailed.Leftfrontcalibrationpointnotreachable.



EveniftheprintermovestheprintbedtotheendYendstop,thePINDAprobe

cannotreachtheleftfrontbedcalibrationpoint.MovetheleftYthreadedrodintheZ

frameawayfromyou,sothePINDAprobereachestheleftfrontbedcalibrationpoint

reliably.You can find how to fix this in the next chapter 6.3.5.1 Y axis

alignment.



7) XYZcalibrationfailed.Rightfrontcalibrationpointnotreachable.



EveniftheprintermovestheprintbedtotheendYendstop,thePINDAprobe

cannotreachtherightfrontbedcalibrationpoint.MovetherightYthreadedrodinthe

Zframeawayfromyou,sothePINDAprobereachestherightfrontbedcalibration

pointreliably.You can find out how to fix this in the next chapter 6.3.5.1 Y axis

alignment.



8) XYZcalibrationfailed.Frontcalibrationpointsnotreachable.



EveniftheprintermovesthetabletotheendYendstop,thePINDAprobecannot

reachthefrontrowofthebedcalibrationpoints.Movebothleft/rightYthreaded

rodsintheZframeawayfromyou.You can find out how to fix this in the next

chapter 6.3.5.1 Y axis alignment.



9) XYZcalibrationcompromised.Leftfrontcalibrationpointnotreachable.

XYZcalibrationcompromised.Rightfrontcalibrationpointnotreachable.

XYZcalibrationcompromised.Frontcalibrationpointsnotreachable.



Printerwilllikelywork,butthebedlevelingmaybecompromisedandtheskewofthe

X/Yaxesmaynotbefullycorrected.Itisrecommendedtoadjustthepositionsofthe

YthreadedrodsintheZframeasincases6)to8).You can find out how to fix this

in the next chapter 6.3.5.1 Y axis alignment.



Duringthemeshbedlevelingprocedurefollowingerrorsmaybereportedonthedisplay.



1) Bedlevelingfailed.Sensordisconnectedorcablebroken.Waitingforreset.



Verify,whetherthePINDAprobecableispluggedintotheRAMBoboardcorrectly.If

itisthecase,thePINDAprobeisbrokenanditneedstobereplaced.



2) Bedlevelingfailed.Sensordidn’ttrigger.Debrisonnozzle?Waitingforreset.



ThisisasafetychecktoavoidthenozzletocrashintotheprintbedifthePINDA

sensorstopsworkingorsomethinggoeswrongwiththeprintermechanics(for

example,apulleyslips).Thissafetycheckmaybetriggeredaswell,iftheprinterhas

beenmovedtoanunevensurface.Beforedoinganythingelse,maketheZaxislevel

bygoingallthewayupandtryagain.



AttheendoftheX/Ycalibration,theprintermeasuresthereferenceheightabove

eachofthe9bedsensorpointsandstoresthereferenceheightsintoanonvolatile

memory.Duringthenormalbedleveling,itisexpectedthatthePINDAprobetriggers

notfurtherthan1mmfromthereferencevalue,thereforethenozzleisnotallowedto

movemorethan1mmbelowthereferencevalueduringthebedcalibration.



Ifyoumovedtheprinter,youmayneedtoreruntheZcalibrationtosamplenew

referenceZheightvaluesreflectingthetwistandbendofthetablesurfacetheprinter

issittingon.Ifthatdoesnothelp,pleaseverify,thatthePINDAprobeisalignedwith

thesensorpointsontheprintbedduringthebedZcalibration.Thealignmentshall

beensuredbytheautomaticX/Ycalibrationroutine.IfthePINDAprobeisnomore

alignedduringtheZcalibrationovertime,itispossible,thatapulleyisslippingor

somethingonthemachineframegotloose.



3) Bedlevelingfailed.Sensortriggeredtoohigh.Waitingforreset.



Similartocase2).ThistimethePINDAsensortriggeredmorethan1mmabovethe

referenceheight.Beforedoinganythingelse,maketheZaxislevelbygoingallthe

wayupandtryagain.



6.3.5.1 Y axis alignment (kit only)



Forautocalibrationtoworkproperly,itisextremelyimportantfortheYaxistobe

perpendiculartotheXaxis.Thiscanbeeasilycheckedbylookingattheprinter

fromthetopandvisuallyaligningtheXaxisrodswithlinesontheheatbed.IftheY

axisismisaligned,youcaneasilyadjustthepositionoftheYaxisinsidetheframe

bylooseningtheM10nutsontheYaxisandsecuringthematthenewlyadjustedposition.

YoucanseehowintheAssemblyManual7.PSU/Step18orinP.I.N.D.A.Probe

Misalignedtopicathelp.prusa3d.com.



Pic.5Xaxisrodsmustbevisuallyalignedwithlinesontheheatbed.



IftheCalibrateXYZgives“XYZcalibrationcompromised.Frontcalibrationpointsnot

reachable.



”error,youdon’tnecessarilyneedtoadjusttheM10nutsandpositionoftheaxis

intheframe,butyoucanadjustthebeltholderposition.NewversionoftheYbeltholder

withaslot(shippedfromAugust8,2016)allowstomakea1mmadjustmenttoboththe

frontandtheback.LoosentheYbeltholderscrews,pushthebeltholderparttowardstheY

motorandretightenthescrews.



6.3.6 Calibrate Z



CalibrateZislocatedinCalibrationmenu.Itshouldbeperformedafteryoumovethe

printertodifferentlocation.Itsavestheheightsofall9calibrationpointsinnonvolatile

memory.Storedinformationisusedeverytimemeshbedlevellingiscalledduringaprint.

Whenthemeasuredvaluesarevastlydifferenttothestoredvalue,printiscanceledasitisa

goodindicatorsomethingiswrong.CalibrateZisapartofCalibrateXYZroutinesothere’s

noneedtorunitaftersuccessfulCalibrateXYZ.



Itisagoodpracticetorunthisprocedureeverytimeyoutravelorprinterisshippedasthe

geometrymightchangeslightlyandcauseanerror.



AtthestartoftheZcalibrationproceduretheprinterpromptsyoubyafollowingmessage:

"CalibratingZ.MoveZcarriageuptotheendstoppers.Clickwhendone.”



Afterthat,theprinterasksyoutoconfirmthisstep:"AreleftandrightZcarriagesallup?"



PleasemakesureyoureallymovetheZcarriageuptotheendstoppersuntilyouheara

rattlingsoundastheZsteppermotorsskipsteps.Thisprocedureensures,that1)theXaxis

isperfectlyhorizontal,2)theprintnozzleisinaknowndistancefromtheprintbed.Incase

theZcarriagedidnottouchtheendstoppers,theprintercouldnotpossiblyknowtheheight

oftheprintnozzleabovetheprintbedanditcouldthereforecrashintotheprintbedduring

theZcalibrationprocedure.



TheZcalibrationprocedurealsopromptsyouto"Pleasecleanthenozzleforcalibration.

Clickwhendone."



Ifthisadviceisnotfollowedandthereisaplasticdebrisontheprintnozzle,thenthedebris

maytouchtheprintbedorevenpushtheprintbedawayfromthePINDAprobe,sothe

PINDAprobewillnottriggerproperlyandthecalibrationwillfail.



6.3.7 Mesh bed levelling



MeshbedlevellingcanbefoundinCalibrationmenu.Itisthesameprocedurewhichis

performedbeforeeveryprint.YoucanuseittochecktheP.I.N.D.A.probealignmentwith

thecalibrationpointshoweveritisnotnecessaryduringthecalibrationprocessasMeshbed

levelingisapartofCalibrateXYZandCalibrateZroutines.



Beforerunningthiscommandcleanthenozzletipfromanydebrisandrunitwhilethe

nozzleiscold.Iftheprobeismisalignedandthenozzleispreheated,thenozzlecan

makepermanentimpressionsintheprintsurface.



Pic.6Theprobemustbeinsidethecircles(1stand9thcalibrationpoint)tosuccessfully

levelthebed



.



6.3.8 Loading the filament into the extruder



● Youneedtopreheatthenozzlebeforeinsertingthefilament(andthebedtooifyou

liketoprintrightaway).Thetemperaturedependsonthematerialused.Detailed

informationaboutnozzleandbedtemperaturesaredescribedatchapter10

Materials.



● PresstheLCDknobtoenterthemainmenuontheLCD.Rotatethebuttontochoose

PreheatoptionandconfirmbypressingtheLCDknob.Nextyouchoosethematerial

youwillprintfrom.ChooseamaterialthenconfirmwithLCDknob.Thenozzleand

heatbedwillheattotherequestedtemperature.



●PresstheLCDknobontheLCDpaneltoenterthemainmenu.Insertthefilamentto

theextruder,choosetheLoadfilamentoptioninthemenuandpressthebuttonto

confirm.Filamentisthenloadedtotheextruderbytheextruderstepper

automatically.Youshouldcutthetopofthefilamentasshowninthepicturebelow

(pict.7detail).



Pict.7



the



filament



totheextruder



● Checkifthefilamentisflowingfromthenozzle.

● Ifyouchangethefilamentforanewonedonotforgettocompletelyremovetheold

filamentbeforetheprintingbyextrudingthefilamentfromSettingsMoveaxis

Extruderuntilthecoloriscompletelychanged.



6.3.8.1 Unloading the filament



Similarproceduretotheloadingoperation.Preheatthenozzleformaterialyouusedlast

time(preassembledprintersareshippedwithPLA).Waitfortemperaturestostabilizeand

useUnloadfilamentoptionfromthemenu.



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Prusa Research Original Prusa i3 MK2 kit User manual

Brand: Prusa Research

Model: Original Prusa i3 MK2 kit

Type: User manual

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Prusa Research Original Prusa i3 MK2 kit User manual

Prusa Research Original Prusa i3 MK2 kit User manual

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