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Table of Contents

1. Introduction

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Step 1 - All the required tools are included

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Step 2 - Labels guide

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Step 3 - Use labels for reference

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Step 4 - Spare bag

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Step 5 - View high resolution images

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Step 6 - Printed parts - versioning

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Step 7 - We are here for you!

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Step 8 - Pro tip: inserting the nuts

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Step 9 - Important: Electronics protection

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Step 10 - Reward yourself

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Step 11 - How to successfully finish the assembly

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2. Y-axis assembly

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Step 1 - Tools necessary for this chapter

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Step 2 - YZ frame - preparing the components

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Step 3 - YZ frame - mounting the longer extrusions

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Step 4 - YZ frame - mounting the shorter extrusions

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Step 5 - YZ frame - final check

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Step 6 - Y-axis: front and rear plate preparation

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Step 7 - Y-axis: front plate assembly

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Step 8 - Y-axis: preparation for the PSU

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Step 9 - Y-axis: rear plate assembly

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Step 10 - Y-axis: geometry check

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Step 11 - Mounting antivibration feet (optional)

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Step 12 - Preparing Y-belt-idler (part 1)

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Step 13 - Preparing Y-belt-idler (part 2)

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Step 14 - Preparing Y-belt-idler (part 3)

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Step 15 - Mounting the Y-belt-idler

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Step 16 - Y-axis: motor and motor holder

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Step 17 - Preparing Y-motor-holder

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Step 18 - Mounting Y-motor-holder

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Step 19 - Y-axis: Y-carriage

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Step 20 - Correct bearing orientation

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Step 21 - Installing bearings on the Y-carriage

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Step 22 - Inserting smooth rods into Y-carriage

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Step 23 - Y-axis: smooth rods holders

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Step 24 - Preparing Y-rod-holder

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Step 25 - Mounting the Y-rod-holder parts

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Step 26 - Installing the Y-carriage

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Step 27 - Aligning the smooth rods

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Step 28 - Assembling the Y-motor pulley

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Step 29 - Y-axis: Assembling the belt

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Step 30 - Y-axis: Assembling the belt

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Step 31 - Y-axis: Assembling the belt

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Step 32 - Y-axis: Assembling the belt

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Step 33 - Y-axis: Assembling the belt

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Step 34 - Y-axis: Assembling the belt

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Step 35 - Aligning the Y-axis belt

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Step 36 - Tensioning the Y-axis belt

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Step 37 - Testing the Y-axis belt

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Содержание i3 MK3S+

Страница 1: ...20 Step 11 Mounting antivibration feet optional 20 Step 12 Preparing Y belt idler part 1 21 Step 13 Preparing Y belt idler part 2 21 Step 14 Preparing Y belt idler part 3 22 Step 15 Mounting the Y belt idler 22 Step 16 Y axis motor and motor holder 23 Step 17 Preparing Y motor holder 23 Step 18 Mounting Y motor holder 24 Step 19 Y axis Y carriage 24 Step 20 Correct bearing orientation 25 Step 21 I...

Страница 2: ...art 2 47 Step 7 Assembling the X axis and smooth rods 47 Step 8 Placing the Z axis top parts part 1 48 Step 9 Placing the Z axis top parts part 2 48 Step 10 Haribo time 49 Step 11 Z axis is finished 49 5 E axis assembly 51 Step 1 Tools necessary for this chapter 52 Step 2 Few tips before we start 52 Step 3 Extruder body parts preparation 52 Step 4 Extruder body parts preparation 53 Step 5 Extruder...

Страница 3: ...assembly 77 Step 49 X axis belt assembly 77 Step 50 Tensioning the X axis belt 78 Step 51 Aligning the X axis belt 79 Step 52 Testing the X axis belt 79 Step 53 Trimming the X axis belt 80 Step 54 Fine tuning the x axis belt 80 Step 55 Nylon guide parts preparation 81 Step 56 Nylon guide assembly 81 Step 57 X carriage back parts preparation 82 Step 58 Cable holder assembly 82 Step 59 X carriage ba...

Страница 4: ...05 Step 24 Connecting the power panic 105 Step 25 Haribo time 106 Step 26 Heatbed and PSU are done 106 8 Electronics assembly 108 Step 1 Tools necessary for this chapter 109 Step 2 Preparing the Einsy door part 1 109 Step 3 Preparing the Einsy door part 2 109 Step 4 Identifying mount holes 110 Step 5 Preparing the lower hinge 110 Step 6 Einsy door assembly 111 Step 7 Wrapping X axis cable 111 Step...

Страница 5: ...s once more 127 Step 38 Finalizing the Einsy case 127 Step 39 Mounting antivibration feet 128 Step 40 Assembling the double spool holder part 1 128 Step 41 Assembling the double spool holder part 2 129 Step 42 Mounting the double spool holder 129 Step 43 Gluing the silver label 130 Step 44 Haribo time 130 Step 45 Hooray 131 9 Preflight check 132 Step 1 SuperPINDA adjustment part 1 133 Step 2 Super...

Страница 6: ...6 ...

Страница 7: ...Original Prusa i3 MK3S kit assembly 7 1 Introduction ...

Страница 8: ...ntended for maintenance No need to use it now the bearings are lubricated There is a dedicated online manual on how to clean the printer and apply the lubricant See help prusa3d com maintenance tips No soldering is required No wire crimping is required STEP 2 Labels guide All the boxes and bags including parts for the build are labelled Number or numbers in the header tells you for which chapter y...

Страница 9: ...most common screws nuts and PTFE tubes You can also use the enclosed letter which contains Prusa Cheatsheet on the other side You can help prusa3d com cheatsheet from our site Print it at 100 don t rescale it otherwise it won t work STEP 4 Spare bag Every type of fastener is included in a separate special bag If you lose a screw when building use one from this bag ...

Страница 10: ...eft corner STEP 6 Printed parts versioning Most of the 3D printed parts on Original Prusa i3 MK3S are marked with their version Dx series e g D1 those parts are printed on Prusa Research farm and are distributed with the kit Rx series e g R6 those parts are available for download at prusa3d com printable parts They are identical to the factory ones In case you have issues while assembling the prin...

Страница 11: ...en that the nut won t fit easily in or might be falling out Let s see how to fix it Nut won t fit in use a screw with a thread along its entire length typically M3x10 M3x18 and screw it from the opposite side of the opening While tightening the screw the nut will be pulled in Remove the screw afterwards Nut keeps falling out Use a piece of tape to fix the nut temporarily in place as soon as you in...

Страница 12: ...onics inside the ESD bag right until you are asked to install them Always touch the sides of the board while manipulating with it Avoid touching the chips capacitors and other parts of the electronics Before you touch the electronics use any conductive steel structure nearby to discharge yourself Be extra cautious in the rooms with carpets which are a source of electrostatic energy Clothes from wo...

Страница 13: ...ve enough bears for all chapters some even ate them all before they started I m glad to announce that after countless weeks of thorough scientific research hundreds of eaten bears we came to a solution At the end of each chapter you will be told a specific amount of bears to consume Eating more or less bears than prescribed in the manual might lead to fatigue or nausea Please consult a professiona...

Страница 14: ...ief as they could be Read them Read the comments from the other users they are great source of ideas We read them too and based on your feedback improve the manual and the entire assembly Use a reasonable force the printed parts are tough but not unbreakable If it doesn t fit check your approach twice Eat the gummy bears as instructed Disobedience won t be tolerated D Most important Enjoy the buil...

Страница 15: ...Original Prusa i3 MK3S kit assembly 15 2 Y axis assembly ...

Страница 16: ...rimming 3mm Allen key for M5 screws 2 5mm Allen key for M3 screws 2mm Allen key for nut alignment STEP 2 YZ frame preparing the components Prepare the following parts to build the YZ frame Aluminum extrusions 4x Aluminum frame 1x M5x16r screw 16x Before you proceed further please place the frame on a FLAT SURFACE this is crucial ...

Страница 17: ... A DIAGONAL see the last picture As soon as you finish the first tighten the second pair Then proceed to the second long extrusion STEP 4 YZ frame mounting the shorter extrusions Take the SHORTER aluminum extrusions and place them next to the frame Short extrusions must be placed on the side where engraved PRUSA logo on the frame top left IS NOT VISIBLE Note screws are inserted from the opposite s...

Страница 18: ...sions must be on the side of the frame with the Prusa logo and the safety sticker also ensure longer extrusions are closer together Short extrusions must be on the side of the frame without the Prusa logo also ensure shorter extrusions are further away from each other STEP 6 Y axis front and rear plate preparation For the following steps please prepare Front plate 1x Rear plate 1x M5x16r screw 16x...

Страница 19: ...d picture As soon as you finish the first tighten the second pair Then proceed to the second long extrusion STEP 8 Y axis preparation for the PSU THIS IS A VERY IMPORTANT STEP Incorrect placement of PSU holders will lead to issues later Take the YZ frame and rotate it with the shorter extrusions towards you Place the PSU holders M3nE in the extrusion use the side section ensure it is the correct e...

Страница 20: ...eed further please place the frame on a FLAT SURFACE this is crucial All the components are cut or drilled by machine for highest precision but with uneven tightening it is possible to warp the frame Using your hand try to wiggle with the frame sides and check whether some corners are lifting up or not In case you find some imperfections release the screws press the extrusions against the FLAT SUR...

Страница 21: ...a step at the end of the assembly to remind you of the antivibration feet For this step please prepare Antivibration foot 4x Turn the YZ frame on the side and insert the antivibration foot Insert and turn 90 degrees to lock it in place Repeat this process on all 4 feet Place them 2 3 cm from the end of each extrusion STEP 12 Preparing Y belt idler part 1 For the following steps please prepare Y be...

Страница 22: ...hree nuts are all the way in In case you can t press the nuts in don t use excessive force Take M3 screw thread it from the opposite side of the printed part as you tighten the screw it will pull the nut in Be careful not to break the idler during tightening STEP 14 Preparing Y belt idler part 3 Insert the prepared bearing in the Y belt idler Bearing housing orientation doesn t matter Secure the b...

Страница 23: ...e on the printed part facing up Secure the Y belt idler with two M3x10 screws Tighten the screws until the printed part reaches the surface of the plate STEP 16 Y axis motor and motor holder For the following steps please prepare Y axis motor 1x Y motor holder 1x M3x10 screw 4x M3n nut 2x Ensure you are using the correct motor there is a label on the bottom of the casing The reason is each motor h...

Страница 24: ...d tighten it Place the Y motor holder on the motor ensure the correct orientation as in the picture use the motor cable Using two M3x10 screws tighten holder and motor together STEP 18 Mounting Y motor holder Take the Y motor holder and place it on the rear plate short extrusions Ensure the correct orientation the motor shaft must be facing towards the aluminium extrusion with the PSU holders Secu...

Страница 25: ...cated online manual on how to clean the printer and apply the lubricant See help prusa3d com maintenance tips STEP 20 Correct bearing orientation The correct orientation When placing bearings onto the Y carriage make sure that they are oriented as shown in both pictures The tracks rows of balls have to be on the sides The incorrect orientation Avoid placing the bearing like in the last picture Thi...

Страница 26: ...nd tighten both nuts Repeat these steps for the remaining two linear bearings STEP 22 Inserting smooth rods into Y carriage Take all the smooth rods and compare their lengths For Y carriage you need mid sized rods 330 mm NOW PLEASE BE VERY CAREFUL Gently insert the rod straight into the bearings do not apply too much force and do not tilt the rod If you can t slide the smooth rod easily check the ...

Страница 27: ...r and insert two M3nS nuts Make sure you ve pressed the nuts all the way in You can use pliers BUT be careful you can damage the printed part In case you can t press the nuts in don t use excessive force First check if there isn t any obstacle in the nut trap Insert one M3nS nut from the side of the Y rod holder Ensure and adjust the alignment of each nut with the 2mm Allen key Repeat this step fo...

Страница 28: ...rods with rod holders and place them in YZ frame Make sure that two bearings are on the left side see the picture Secure each front holder with two M3x10 screws Tighten both screws equally but not completely We will tighten them fully later on Insert the M3x10 screw into the hole in each front holder and tighten it Take the second pair of the Y rod holders and secure them with M3x10 screws on the ...

Страница 29: ...ws in the front Y holders Move the Y carriage to the rear plate and tighten all screws in the back Y holders STEP 28 Assembling the Y motor pulley There is a flat part on the motor shaft rotate it similarly to the first picture See the direction of the arrows Place a GT2 16 pulley on the Y motor shaft as shown in the picture Don t press the pulley against the motor Leave a gap so the pulley can ro...

Страница 30: ...belt holder 1x smaller of two Y belt tensioner 1x bigger of two Y axis belt 650 mm 1x M3x30 screw 1x M3x10 screw 4x M3nN nyloc nut 1x M3n nut 2x STEP 30 Y axis Assembling the belt Take the Y belt holder smaller of the two printed parts Insert M3n nut all the way in Insert M3nN nyloc nut all the way in Use the screw pulling technique ...

Страница 31: ...ld the nut from the other side until the screw reaches its thread STEP 32 Y axis Assembling the belt Using M3x10 screw fix the Y belt holder to the Y carriage Tighten the screw and ensure the printed part is parallel with the axis between the Y motor and Y belt idler Use the hole on the left see the picture Guide the belt along the Y axis around the pulley on the Y motor and back Make sure the bel...

Страница 32: ... end are within the width of the printed part Teeth on the belt must be facing up Tighten the screw until you reach the nut don t over tighten the screw you will deform the belt Hold the nut from the other side until the screw reaches its thread STEP 34 Y axis Assembling the belt Using M3x10 screw fix the Y belt tensioner to the Y carriage Don t tighten the screw completely we need to adjust the p...

Страница 33: ...you reach the best position Tighten both screws on the pulley STEP 36 Tensioning the Y axis belt Using a finger on your left hand push the belt down Some force should be needed for bending the belt BUT don t try to overstretch the belt as you might damage the printer You can change the tension in the belt by adjusting the M3x30 screw below the Y carriage Tighten the screw bring the parts closer an...

Страница 34: ... you should feel a resistance and the Y carriage won t move at all If the belt is too loose it will deform create a wave and jump over the teeth on the pulley After the proper tension is set tighten the M3x10 screw STEP 38 Haribo time Carefully and quietly open the bag with the Haribo sweets High level of noise might attract nearby predators You need to split the bears into 8 groups according to t...

Страница 35: ...nished Y axis is done great job Check the final look compare it to the picture Note that you should feel some resistance while moving with the Y carriage It is due to the tightened belt and also the motor has some resistance Ready for more Lets move to chapter 3 X axis assembly ...

Страница 36: ...36 Original Prusa i3 MK3S kit assembly 3 X axis assembly ...

Страница 37: ... 1 Tools necessary for this chapter 2 5mm Allen key for M3 screws 2mm Allen key for nut alignment STEP 2 X axis x end idler and motor holder For the following steps please prepare X end motor 1x X end idler 1x Linear bearing 4x The list continues in the next step ...

Страница 38: ...t is pushed all the way down DON T TRY TO PUSH the bearings from the other side There is a rim smaller diameter of the hole First pair of bearings should be in line with the top surface on both X ends Second pair of bearings should be seated on the rim close to the lower surface on both X ends You can press the bearings against the flat surface for easier insertion Place two bearings in a way that...

Страница 39: ... idler bearing assembly ATTENTION be very careful during the tightening check the nut orientation and DO NOT use excessive force you can break this part Insert the M3nN nyloc nut in the X end idler In case you can t press the nut in don t use excessive force Leave the nut for now and proceed with the other components for this step Insert the 623h bearing into the X end idler Secure it in place usi...

Страница 40: ...pe oil and grease from the bearing surface STEP 8 Marking the bearings Wipe grease from the outer surface of the bearing with a paper towel Position the bearing so that you can see two rows of balls Like in the picture Make a mark with a permanent marker on the outer surface of the bearing in the middle above two rows of balls Use the same procedure for the remaining two bearings We will use these...

Страница 41: ...g new bearings Insert the rods with bearings fully into the printed parts Insert the rods very carefully Do not tilt the rods too much Ensure the correct orientation of the parts and rods There is a special opening in the top bottom of both X ends Check if you pressed the smooth rod all the way in STEP 10 Assembling the X axis motor pulley part 1 For the following steps please prepare X axis motor...

Страница 42: ...inst the pad flat part on the shaft Slightly tighten both screws Don t press the pulley against the motor Leave a gap so the pulley can rotate freely Don t tighten the pulley firmly yet we ll get to that later STEP 12 X axis assembling the motor Prepare M3x18 screws 3x Prepare the motor for X axis with an assembled pulley Place the X axis on the motor as shown in the picture Insert the M3x18 screw...

Страница 43: ...3 MK3S kit assembly 43 STEP 13 Haribo time This is an easy easy chapter have a 10 dose of bears STEP 14 X axis is finished X axis is done Check the final look compare it to the picture Checked everything It s time for 4 Z axis assembly ...

Страница 44: ...44 Original Prusa i3 MK3S kit assembly 4 Z axis assembly ...

Страница 45: ...ote the correct orientation of the frame the PRUSA logo and the safety sticker must be facing towards you For the following step please prepare Z axis bottom left 1x Z axis bottom right 1x M3x10 screw 6x Place the printed parts next to the frame See the left L and right R marking on the printed parts Tighten each printed part with M3x10 screws Don t use excessive strength during tightening In case...

Страница 46: ...e motor but not too tight The motor must be able to spin freely STEP 4 Z axis assembling the motors For the following step please prepare Z motor left labeled Z axis left shorter cable Z motor right labeled Z axis right longer cable M3x10 screw 8x See the second picture The motor with the shorter cable red arrow is on the left the motor with the longer cable orange arrow is on the right ATTENTION ...

Страница 47: ...into traps on both X ends In case you can t press the nuts in don t use excessive force First check that there isn t any obstacle in the nut trap STEP 6 X axis trapezoidal nuts part 2 Carefully rotate the X axis onto its backside Insert the trapezoidal nuts to each X end Note the correct orientation of the trapezoidal motor nuts Tighten the nuts with M3x18 screws You can use any of all four holes ...

Страница 48: ...slide until both trapezoidal lead screws are visible If you feel any significant resistance try to reseat the axis first Make sure the top smooth rod of the X axis and the lower edge of the frame are parallel NOW PLEASE BE VERY CAREFUL Gently insert the remaining smooth rods through the bearings on the X axis all the way down into printed parts do not apply too much force and do not tilt the rod I...

Страница 49: ...are fully aligned with the holes on the frame Use two M3x10 screws to tighten the Z axis top left part Don t use excessive strength during tightening In case of increased resistance try to place the screws from the other side to clean up the hole Then return to the front side Repeat this step on the other side of the frame with Z axis top right printed part STEP 10 Haribo time Z axis was easy have...

Страница 50: ...4 Z axis assembly 50 Original Prusa i3 MK3S kit assembly STEP 11 Z axis is finished Z axis is done Check the final look compare it to the picture Checked everything It s time for 5 E axis assembly ...

Страница 51: ...Original Prusa i3 MK3S kit assembly 51 5 E axis assembly ...

Страница 52: ...embled extruder is essential The bag with fasteners includes M3x20 and M3x18 screws make sure you won t mix them Pay attention to the instructions when to use the M3x20 Keep the magnets apart in a sufficient distance They can break each other The hotend for MK3S needs a shorter PTFE tube compared to the MK3S more info at help prusa3d com PTFE MK3S Pay great attention to the cable management if you...

Страница 53: ...repare Extruder body 1x Adapter printer 1x FS lever 1x Look for these parts in E AXIS and MK3S MK2 5S EXTRUDER bags The list continues in the next step STEP 4 Extruder body parts preparation For the following steps please prepare M3x18 screw 1x M3x10 screw 1x M3nS nut 2x M3n nut 2x Steel ball 1x Magnet 10x6x2 1x Magnet 20x6x2 1x ...

Страница 54: ...uts using the Allen key Secure the nut using an M3x10 screw Tighten the screw just slightly later on we need to add the SuperPINDA sensor Take two M3n nuts and insert them in Use the screw pulling technique Flip the Extruder body and insert one M3nS nut all the way in the part Take the smaller magnet 10x6x2 and insert it carefully in the FS lever Majority of the magnet will be hidden inside the pr...

Страница 55: ... the lever can move freely WARNING make sure the following procedure is done right otherwise the filament sensor won t work Insert the bigger magnet 20x6x2 in the Extruder body it will stick out Incorrect setup magnets are attracting each other thus the lever is pulled to the left Correct setup magnets are repelling each other thus the lever is pushed to the right ...

Страница 56: ...nt In case of any rough surface remove the ball and clean the inside of the printed part Place the printer part together with the steel ball in the Extruder body See the rounded protrusion on the printed part It must fit to the groove in the Extruder body The surfaces of both parts should be almost aligned DON T use any screw to secure the Adapter printer It should hold inside the Extruder body by...

Страница 57: ...ch gears Make sure you have all the parts and you are using correct ones Use now Bondtech gear with a set screw If the screw is out gently screw it in leave space inside for the shaft Use later Bondtech without a set screw bearings and a shaft Keep the bearings somewhere safe they tend to roll away In the upcoming steps always check the pictures to ensure the correct orientation of the Bondtech ge...

Страница 58: ...ghten the screw just yet We will align it properly first See the next step STEP 10 Bondtech gear alignment Take a piece of the 1 75 filament You can use the bundled one on a spool don t use the black nylon which is too thick Straighten the filament as much as possible Place the filament along the path and align the gear properly The filament will be always slightly bent Use it anyway for the initi...

Страница 59: ...t alignment using the Allen key Leave the hole on the arm empty for now We will use it later while assembling a print fan STEP 12 Hotend parts preparation For the following steps please prepare Hotend for the MK3S 1x M3x40 screw 2x M3x10 screw 2x We will use one M3x40 later on keep it around Don t cut the main zip tie on the hotend cables or remove the rubber band it will make the assembly easier ...

Страница 60: ...ly In order to protect the hotend cables and ensure proper orientation it is highly recommended to use a box Use the one provided in the kit Place the Extruder body with the hotend on the box and make sure the cables are on the left side and pointing down Place your finger temporarily on the longer magnet and place the extruder motor assembly on the Extruder body The Bondtech gear might pull the m...

Страница 61: ...AN ORDER Seriously use a screw to pull the nuts in both have to be properly seated in the X carriage Take both M3n nuts and using pliers or screw push them in the X carriage then using a screw from the other side pull them all the way in Don t forget to remove the screw Take all four M3nS nuts and insert them in Ensure correct alignment using the Allen key From now on keep in mind the nuts are ins...

Страница 62: ...ember this path we will use it for other cables as well STEP 18 Assembling the X carriage Following cable management is CRUCIAL for the extruder TO WORK PROPERLY Read the instructions carefully Start by making a small loop just below the extruder motor Leave a slack about 2 3 cm 0 8 1 2 inch This is comes handy for easier disassembly in the future Then guide the cable in the channel all the way to...

Страница 63: ... cable follows the channel both in Extruder body and X carriage In the X carriage the motor cable will follow the path of the IR sensor cable ENSURE NO WIRE IS PINCHED Then use the M3x10 screw and Allen key with ball end to connect both parts together If you are inserting the screw at this moment it will be slightly inclined in the beginning but it will straighten up after few turns Don t tighten ...

Страница 64: ...truder body and secure it with the M2x8 Make sure the black plastic u shaped part is facing down Tighten the M2x8 screw the sensor shouldn t be able to move but be careful the PCB isn t indestructible Connect the cable mind the correct orientation of the connector and wires Leave a slack behind the sensor like in the picture Don t create too big loop as it might interfere with the frame If needed ...

Страница 65: ...ssembly Finish the sensor assembly by inserting an M3x40 screw Make sure all the gaps are gone STEP 23 Hotend fan parts preparation For the following steps please prepare Hotend fan 1x M3x14 screw 3x Make sure you are using the correct screws Keep the cable in a bundle for now ...

Страница 66: ... is facing inside the extruder First create a loop on the cable Make sure the black protective wrap is close to the edge of the fan See the picture Place the fan on the extruder and proceed in the following way Start by placing the fan s cable in the upper channel Slide the fan close to the X carriage and GENTLY PUSH the cable in using an Allen key Before you push the fan all the way to the left p...

Страница 67: ... sure the fan can rotate freely Note that the screws are self tapping in the printed parts There are no nuts Leave the last hole empty for now STEP 27 Extruder idler parts preparation For the following steps please prepare Extruder idler 1x Bondtech WITHOUT the hole for the set screw 1x Bearing 2x might be stuck inside the gear Shaft 1x M3n nut 1x M3x40 screw 2x Idler spring 1x place the spring on...

Страница 68: ...truder idler assembly Take M3n nut and place it in the Extruder idler Use the screw pulling technique Insert the pulley in idler as shown in the picture Slide the shaft through the idler and pulley Use reasonable force or you will BREAK the printed part The shaft should be flush with the surface of the printed part Place your finger on the bearing and ensure it can rotate freely ...

Страница 69: ...e filament from the top through the Bondtech into the PTFE tube Check the alignment and if needed adjust the position Tighten the screw but be careful you can easily strip it REMOVE the filament STEP 31 Extruder idler mounting Place the Extruder idler in place and secure it using a M3x40 screw Don t tighten the screw too firmly it serves as a shaft for the idler Check that the idler can rotate fre...

Страница 70: ...pare FS cover 1x M3x10 screw 1x STEP 33 FS cover assembly Place the FS cover on the extruder and align it according to the picture Insert the M3x10 screw mind the correct hole and tighten it Tip If you can t reach the nut try to align it using an Allen key or pulling it up using a longer full threaded screw from the spare bag ...

Страница 71: ... the Extruder idler Hold the Extruder idler on the other side until the screw reaches the nut Since there is only one screw you need to introduce a large force The head of the screw should be aligned or slightly below the surface STEP 35 Print fan support parts preparation For the following steps please prepare Print fan support 1x M3x10 screw 1x M3n nut 1x ...

Страница 72: ...ll the way to the support It is crucial Use the screw pulling technique Place the support on the extruder and ensure the inclined part is facing down towards the nozzle Secure the support using an M3x10 screw STEP 37 Fan shroud parts preparation For the following steps please prepare Fan shroud 1x M3x20 screw 1x M3nS nut 1x ...

Страница 73: ... the extruder Make sure that both protrusions on the Fan shroud fit in the grooves on the extruder see the picture Secure it using the M3x20 screw Don t overtighten the screw you can break the plastic casing Also make sure the fan can rotate freely STEP 39 Print fan parts preparation For the following steps please prepare Print fan 1x M3x20 screw 2x M3n nut 1x You need M3x20 screw due to its lengt...

Страница 74: ...the fan s casing Turn the extruder around and insert the M3n nut No need to pull it in we will use the screw Place the remaining M3x20 screw from the other side and tighten it but carefully or you will damage the fan s casing Guide the cable according to the picture in the channel Bend it slightly towards the extruder DON T stretch the cable STEP 41 SuperPINDA sensor parts preparation For the foll...

Страница 75: ...INDA sensor in the holder Exact position doesn t matter we will adjust it later Tighten the M3x10 screw but just slightly Create a loop on the cable from the sensor Push the cable in the channel together with the fan cable STEP 43 Extruder parts preparation For the following steps please prepare Zip tie 2x ...

Страница 76: ... for now Turn all three bearings so that the markings are facing you Place the extruder on the bearings the top couple must fit perfectly Make sure the X carriage is facing towards you together with the shorter extrusions We will adjust the lower bearing later on Tighten and cut the zip ties STEP 45 Extruder channels cable management Place the cables on the SuperPINDA sensor side over the lower sm...

Страница 77: ...rt the flat part of the X axis belt into the X carriage as in the picture Use a screwdriver or the smallest Allen key to push the belt in STEP 48 X axis belt assembly Guide the X axis belt through the X end idler around the 623h bearing with the housing and back Continue with the belt through the X carriage Guide the X axis belt through the X end motor around the GT2 16 pulley and back ...

Страница 78: ...t through the X axis please release two M3 screws on the X end Rotate the X axis motor as indicated towards the frame Insert the flat part of the X GT2 belt into the X carriage as in the second picture Use a screwdriver or the smallest Allen key to push the belt in There will be belt overhang on this side DON T TRIM IT yet ...

Страница 79: ...ressed with your fingers it must be straight If you are struggling to rotate the motor back into position the belt tension is too high Depending on the belt being under or overstretched adjust the amount of the belt in the X carriage When done rotate the motor to its original position and tighten the M3 screws again STEP 51 Aligning the X axis belt Both top and bottom part of the belt should be pa...

Страница 80: ...til now You have to rotate the motor and retighten the belt in the X carriage Shortening the belt length by moving one or two teeth outside X carriage should be enough STEP 53 Trimming the X axis belt For the following step we recommend getting a white marker but you can also trim the belt without it Measure the part which must be trimmed and gently take the end of the belt away from the X carriag...

Страница 81: ...fingers Move the extruder all the way to the X end idler and try the belt tension in the middle of the X axis When you achieve optimal tension please tighten the screws again In case you experience X axis failure during calibration or skipped layers in the X direction you can adjust this screw accordingly Tightening the screw stretches the belt Releasing the screw has opposite effect Each time don...

Страница 82: ...ist it Hold the extruder with your other hand BE EXTREMELY CAREFUL as the pliers tend to slide and you can easily damage the wires To check if the filament is seated properly gently pull it with your hand The X axis should bend a little but the filament must remain in the slot If you have issues try to adjust the tip on the filament STEP 57 X carriage back parts preparation For the following steps...

Страница 83: ...he way through the printed part Note there is a recess slot for the screw s head on one side of the printed part STEP 59 X carriage back assembly Take the M3n nut and place it in the printed part all the way in Use the screw pulling technique Rotate the X carriage back and tighten it together with the cable holder Check the u shaped slot is aligned properly on both parts ...

Страница 84: ...bles from hotend are NOT GOING through the X carriage back Carefully insert the nylon filament and then slide the X carriage back towards the X axis STEP 61 X carriage back assembly For this step please prepare M3x10 screw 4x Before you tighten the X carriage back arrange all cables make sure none is pinched Use all four screws and tighten the X carriage back Tighten the screws with a reasonable f...

Страница 85: ...inserted earlier Leave the cables from the hotend out for now Length of the first wrap should be slightly longer than the cable holder part about 5 cm is enough Gently twist the sleeve to make it smaller and tighter around the cables orient the sleeve s seam downwards then slide the sleeve towards the extruder Take 3 zip ties and insert them into the lower row of holes on the cable holder Twist th...

Страница 86: ...ies and cut remaining parts Open the textile sleeve and insert the cables from the hotend Compare the look of the cable management with the last picture The zip tie arrangement was tested with the injection molded double spool holder provided in the kit and assembled later on If you intend to use any other frame mounted type holder make sure the zip ties won t crash into it which might result in a...

Страница 87: ...5 E axis assembly Original Prusa i3 MK3S kit assembly 87 STEP 66 E axis is finished Are we there yet Almost Check the final look compare it to the picture Checked everything Let s move to 6 LCD assembly ...

Страница 88: ...88 Original Prusa i3 MK3S kit assembly 6 LCD assembly ...

Страница 89: ...ring the LCD parts For the following steps please prepare LCD cover 1x LCD knob 1x LCD support 2x LCD screen 1x M3x10 screw 6x M3nS nut 4x SD card 1x STEP 3 Checking the LCD cables Before you start please ensure the cables are plugged in the correct order To the slot called EXP1 see the board must be connected cable with ONE black stripe To the slot called EPX2 EXP2 see the board must be connected...

Страница 90: ...o need to worry at this moment You can now remove the protective foil from the screen Don t throw it away we will reapply it soon STEP 5 Assembling the LCD cover Press the LCD controller with the LCD support into the LCD cover as shown in the picture Be careful there is a control knob on the other side Adjust the position of the supports if needed Press it as deep as possible The LCD controller mu...

Страница 91: ...EP 6 Securing the LCD controller Using the 2 5mm Allen key and two M3x10 screws secure the LCD controller in place STEP 7 Preparing the supports for assembly Place four M3nS nuts in the prepared slots all the way in Check the proper alignment with Allen key ...

Страница 92: ...n the mounted LCD Apply the feet now or be very careful as you might damage the LCD holder For assembly head back to Chapter 2 Y axis Locate the holes for M3 screws on the front plate Press through four M3x10 screws Place the LCD assembly onto the front side of the Y axis Tighten all four screws STEP 9 Assembling the LCD knob Assemble the LCD knob part as shown in the picture Knob mounting orienta...

Страница 93: ...ave 10 not more STEP 11 LCD is done That was fast Wasn t it Check the final look compare it to the picture You can now remove the protective foil from the LCD panel You can slide the SD card in from the left side However it is recommended to wait till the printer is completed Ready for the next chapter Let s move to 7 Heatbed PSU assembly ...

Страница 94: ...94 Original Prusa i3 MK3S kit assembly 7 Heatbed PSU assembly ...

Страница 95: ... Allen key for heatbed alignment STEP 2 Heatbed cable assembly part 1 For the following step please prepare Heatbed MK52 24V 1x Power cable 1x M3x10 screw 2x M3 3 2 9 0 8 washer 2x M3nN nylock nut 2x IT IS VERY IMPORTANT to connect the power cable correctly Before you start the assembly have a look at the pins The one on the left with GND sign must be connected to the BLACK WIRE ...

Страница 96: ...le position in the next step therefore do not tighten the screw too firmly Repeat this procedure for the second red wire STEP 4 Heatbed cable assembly part 3 Before proceeding further please check again the cable is connected with the correct polarity to the heatbed and properly tightened Otherwise there is a risk of damage to the printer BLACK wire must be connected to the GND RED wire must be co...

Страница 97: ...able cover clip 1x Heatbed cable cover 1x STEP 6 Preparing the heatbed cable cover Take the smaller part and insert M3n nuts Use the screw pulling technique Keep this part for later use STEP 7 Mounting the heatbed cable cover Place the bigger heatbed cable cover next to the heatbed See the hole which has to match the one on the heatbed Now place the cover on the heatbed and align it Use the M3x10 ...

Страница 98: ...etch the black thermistor cable leave some slack under the heatbed so when the heatbed moves during print the cable won t get stretched resulting in disconnection from the centre of the heatbed However the slack shouldn t be causing the cable to sag down more than few millimetres Otherwise the cable might rub against the printer s frame and damage itself Turn the heatbed upside down to check this ...

Страница 99: ...the cable cover Please proceed to the next step STEP 11 Securing the sleeve in place Take the smaller cover you have prepared earlier and place it like in the picture Make sure the thermistor cable is in the middle going through a cutout in the printed part Otherwise you will pinch and possibly break the cable Hold the cover and flip the heatbed back Insert two screws M3x10 and tighten them procee...

Страница 100: ...will evenly wrap all around the cable bundle STEP 13 Preparing the heatbed screws and spacers For the following steps please prepare M3x12b screw 9x 6x6x3t spacer 9x STEP 14 Mounting the heatbed part 1 Push the Y carriage to the front and place the Heatbed behind Locate a hole in the centre of the Y carriage Place one spacer on the top of the hole The exact position of the spacer will be adjusted ...

Страница 101: ...e the Allen key to align all parts After the alignment insert the M3x12b screw instead Tighten the screw just slightly STEP 16 Mounting the heatbed part 3 Move to the right side of the heatbed Place another spacer with the pliers Push the pliers between the heatbed and the Y carriage Use the Allen key to align the spacer After the alignment insert the screw instead and tighten it slightly ...

Страница 102: ...bly STEP 17 Mounting the heatbed part 4 Using pliers insert spacers and screw into the remaining holes DON T fully tighten the screws After all screws are in place tighten them in the following order Center screw First four screws edges Last four screws corners ...

Страница 103: ...sure you follow the instructions The blue terminals won t fit the Einsy board STEP 19 Assembling the PSU Turn the back of the printer towards you and locate the PSU holders Insert M3x10 screws into them Make only 3 4 turns it should be enough to hold the PSU for now Take the PSU and place it above the screws Adjust the span of the PSU holders Slide the PSU on the screws and tighten them but not to...

Страница 104: ...sion and also in direct contact with the vertical frame Everything aligned Tighten the M4 screws Now tighten the M3 screws connecting the PSU with the extrusion STEP 21 Connecting the power cables CRITICAL WARNING Triple check you have connected the cables correctly There is a risk of damaging the PSU or the printer itself if the cables are connected incorrectly or not tightened properly Make sure...

Страница 105: ...he first slot and black in the third Make sure that cables are properly tightened Otherwise there is a risk of damage to the printer STEP 23 Connecting the power cables Release the screw on the SECOND positive slot from the left Take the second cable and choose the RED wire slide it all the way in Make sure the steel washer is above the fork connector Tighten the screw firmly but keep in mind some...

Страница 106: ...e and place it close to the power cables PSU cable Be careful as you might snap the entire connector from the board keep that in mind until the printer is fully assembled don t pull the cable Guide the cables to the other side of the printer We will fix them to the frame later on Don t place the cover on the PSU wait for the next chapter STEP 25 Haribo time Slightly harder chapter but have 10 We n...

Страница 107: ...re getting closer Just one more chapter and the assembly is done Check the final look compare it to the picture Don t place the steel sheet on the heatbed yet Wait for the instructions in the Wizard during the calibration process Ready for the last assembly part Let s jump into 8 Electronics assembly ...

Страница 108: ...108 Original Prusa i3 MK3S kit assembly 8 Electronics assembly ...

Страница 109: ...y for nut alignment Philips screwdriver to tighten PSU and HB cables WARNING Make sure to protect the electronics against electrostatic discharge ESD Keep the Einsy board in the antistatic bag until it is needed for the assembly STEP 2 Preparing the Einsy door part 1 For the following steps please prepare Einsy door 1x Einsy hinge top 1x Einsy hinge bottom 1x M3nS nut 1x M3x10 screw 2x ...

Страница 110: ...it down if needed Check the proper alignment with the Allen key If this nut is loose in the slot then it can easily fall out and then possibly short some electrical contacts on the Einsy board whenever you open your Einsy case STEP 4 Identifying mount holes Turn the rear side of the printer towards you Holes with blue arrows will be used to mount the hinges for the Einsy door ...

Страница 111: ...re is a cutout for the screw s head in the printed part Locate the hole for the lower hinge Place the hinge on the frame and tighten the screw The hinge must be facing upwards STEP 6 Einsy door assembly Place the Einsy door on the lower hinge Take the Einsy hinge top and push M3x10 screw through Assemble the Einsy hinge top in the door and mount it to the frame ...

Страница 112: ... Einsy case is assembled but you can leave the zip tie in place afterwards STEP 8 Preparing the Einsy base part 1 For the following steps please prepare Einsy base 1x M3x10 screw 6x M3nS nut 4x M3n nut 4x EINSY RAMBo motherboard 1x Keep the silver label for later Einsy base has a maintenance opening for the RPi Zero W If you intend to use this mini computer you can carefully cut the piece of the p...

Страница 113: ...d holder note one slot is from the inside of the cover Two nuts inside the extruder cable holder Press the nuts all the way in Check the proper alignment using an Allen key STEP 10 Preparing the Einsy base part 3 Insert four M3n nuts in nut traps Slide EINSY inside the base and tighten it with four M3x10 screws Tighten the screws carefully you can damage the board Use the needle nose pliers to hel...

Страница 114: ...just slightly 3 4 turns are enough for now STEP 12 Mounting the Einsy base part 2 Before mounting the base on the frame take the cable from X axis motor see the yellow label and plug it in the EINSY Push the textile sleeve in the slot and leave some slack of the cable along the board don t stretch the cable See the slots on the printed part which will be used for the M3x10 screws those are already...

Страница 115: ...he cables on the printer We ve tested several ways and this seems to be the most efficient In the upcoming steps please tighten all zip ties carefully as you might pinch break the cables Turn the printer on the PSU side then guide the cables go below the extrusion Start with the Z axis motor right Slide the zip tie through the circular holes in the frame to create a loop Push the cable gently in t...

Страница 116: ...e Push the cable gently in the zip tie and tighten it so it is snug and holding the wires Be careful not to over tighten the tie as it can cut the wires Cut the remaining part STEP 16 Cable management part 3 Continue upwards and using another zip tie create the next loop Insert Y axis motor cable to the current bundle Push the cable gently in the zip tie and tighten it so it is snug and holding th...

Страница 117: ...the cables too much Use the whole length of the extrusion Bend the cable bundle down for now Carefully fold the LCD cables around the frame STEP 18 Cable management part 5 Continue upwards and using another zip tie create the next loop Take the bundle of cables and place it over the LCD cables Push the cables gently in the zip tie excluding the LCD cables and tighten it Cut the remaining part ...

Страница 118: ...nt part 7 Push the cables gently in the zip tie before you tighten the zip tie read the next point This time be very careful Tighten the zip tie slightly or you will damage the LCD cables The zip tie should be snug to hold the wires in place Over tightening it can cut the wires That s it Cables are organised let s connect them to the EINSY board Now you can turn the printer back on its feet STEP 2...

Страница 119: ...d cable bundle Insert the heatbed cable bundle including the textile sleeve in the Einsy base Make sure the sleeve is inside the holder see the picture Use the Heatbed cable clip and two M3x10 screws to fix the cable bundle in place Note the correct orientation of the clip try closing the door ...

Страница 120: ... coloring system Version A both wires on each pair are black POSITIVE WIRE is marked with a RED LINE Version B on each pair there is a red and black wire POSITIVE WIRE is FULLY RED Connect wires from PSU and HEATBED to the EINSY board in the following order red arrows indicate positive slot The first cable from the PSU A A The second cable from the PSU B B Cable from the heatbed C C Both cables tw...

Страница 121: ...e positive slot on EINSY See the pictures for red arrows Make sure the bent part of the cable connector is always facing up away from the board The same setup was used during the PSU assembly Check once more following setup Take the first cable from the PSU and connect the pair of wires to the EINSY board Use the bundled Philips screwdriver TIGHTEN the screw firmly Take the second cable from the P...

Страница 122: ...inal check of the power cables Make sure you ve connected the correct polarity and tightened the screws properly Note that the PSU and Einsy board have different order of the polarities ALWAYS look for the signs Red wire positive polarity Black wire negative polarity Slide the cover on the cables from the top Make sure the PRUSA logo is facing up Secure the cover using two M3x10 screws Note that t...

Страница 123: ...rinter to the electronics Guide the LCD cables along with the frame behind this cable bundle Tie all the cables together Do not overtighten the zip tie you can damage the cables Cut the remaining part of the zip tie STEP 29 Connecting the extruder cable bundle Find the slot for the NYLON filament you will need it in the next step ...

Страница 124: ...le bundle Separate the nylon filament slightly from the rest of the cables No need to unwrap the sleeve Slide the NYLON filament in the hole If the nylon is hidden inside the textile sleeve use the technique in the previous step to reach it Make sure the filament isn t pushing into the X axis motor cable which would indicate it is too long and you need to slightly unwrap the sleeve and push the fi...

Страница 125: ... to the left connector P2 Connect the LCD cable with ONE stripe to the right connector P1 STEP 33 Connecting the motor cables X axis motor is already connected Connect the Y axis motor cable labelled Y and make a loop with the cable like in the picture Connect both Z axis motors labeled Z and make similar loops with the cables Connect the Extruder motor cable labelled E Guide the Power Panic cable...

Страница 126: ...zip tie through the lower perforation STEP 35 Hotend cable management part 1 Connect the IR sensor cable to the lower row of the connector That is crucial Otherwise you can burn the sensor Connect the print fan cable to the connector Connect the extruder thermistor to the connector Guide all these cables along the sides of the Einsy base box Make sure they are guided below both zip ties so they ca...

Страница 127: ...onnect the hotend fan cable to the Einsy Tie the cable bundle with the upper zip tie Make sure the hotend fan cable is included Do not overtighten the zip tie STEP 37 Verify all connections once more Check your electronics connection with the first picture Compare your cable management with the picture Make sure once more the Filament sensor cable is connected to all pins Misalignment might lead t...

Страница 128: ...door Make sure that no wire is pinched Tighten the M3x40 screw STEP 39 Mounting antivibration feet If you ve assembled the feet in the second chapter you can skip this step Antivibration feet 4x Turn the frame on its side insert feet and turn 90 degrees to lock them in place Repeat this process on all 4 feet Place them 2 3 cm from the end of each extrusion ...

Страница 129: ...oth arms are identical Make sure the C shaped part which will snap on the printer s frame is facing towards you Take the arm on the right side insert it gently in the main part and start to rotate clockwise away from you It should take about half the turn to lock the part in place Take the arm on the left side insert it gently in the main part and start to rotate anticlockwise towards you It shoul...

Страница 130: ... holder STEP 43 Gluing the silver label WARNING This step is important don t skip it The silver label includes the printer s serial number and other important information Its presence is necessary for any warranty claim In case the label is already on the frame please skip this step Rotate the printer so that the rear side with the PSU and electronics faces towards you Locate the part of the frame...

Страница 131: ...S kit assembly 131 STEP 44 Haribo time Phew That was a lot of work to do Eat 15 of the bears STEP 45 Hooray Congratulations you ve just assembled the Original Prusa i3 MK3S 3D printer You re almost there Just finish the chapter 9 Preflight check ...

Страница 132: ...132 Original Prusa i3 MK3S kit assembly 9 Preflight check ...

Страница 133: ...ve the nozzle until you reach the heatbed Try rotating both the rods equally Check again from a different angle the nozzle is touching slightly the heatbed Don t bend the heatbed Don t place the steel sheet on the heatbed during the entire SuperPINDA sensor adjustment process Wait for the XYZ calibration STEP 2 SuperPINDA adjustment part 2 Move the extruder carefully all the way to the right Make ...

Страница 134: ...er again DO NOT use glue to fix SuperPINDA sensor in the new type of holder with the M3 screw you won t be able to release it again A correct height of the SuperPINDA sensor compared to the nozzle should be similar to the last picture STEP 4 Quick guide for your first prints See our free 3D Printing Handbook prusa3d com 3dhandbookMK3S Read the chapters Disclaimer and Safety instructions Read the c...

Страница 135: ...STEP 6 Prusa knowledge base If you encounter any problems at all don t forget you can always check out our knowledge base at help prusa3d com We re adding new topics every day STEP 7 Join PrusaPrinters Don t forget to join the biggest Prusa community Download the latest models in STL or G code tailored for your printer Register at PrusaPrinters org Looking for an inspiration on new projects Check ...

Страница 136: ... time That s it the assembly is over Calibrate the printer according to the Handbook and you are ready to print Eat the remaining bunch of bears We hope you ve enjoyed the build Don t forget to leave feedback and see you in the next one ...

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