Prusa research I3 mk3s+ User manual

Table of Contents

1. Introduction 7 .......................................................................................................................

Step 1 - All the required tools are included 8 ................................................................

Step 2 - Labels guide 8 .....................................................................................................

Step 3 - Use labels for reference 8 .................................................................................

Step 4 - Spare bag 9 .........................................................................................................

Step 5 - View high resolution images 9 ........................................................................

Step 6 - Printed parts - versioning 10 .............................................................................

Step 7 - We are here for you! 10 ......................................................................................

Step 8 - Pro tip: inserting the nuts 11 .............................................................................

Step 9 - Important: Electronics protection 11 ...............................................................

Step 10 - Reward yourself 12 ...........................................................................................

Step 11 - How to successfully finish the assembly 13 ..................................................

2. Y-axis assembly 15 ............................................................................................................

Step 1 - Tools necessary for this chapter 16 ..................................................................

Step 2 - YZ frame - preparing the components 16 ......................................................

Step 3 - YZ frame - mounting the longer extrusions 16 ..............................................

Step 4 - YZ frame - mounting the shorter extrusions 17 .............................................

Step 5 - YZ frame - final check 17 ...................................................................................

Step 6 - Y-axis: front and rear plate preparation 18 .....................................................

Step 7 - Y-axis: front plate assembly 18 .........................................................................

Step 8 - Y-axis: preparation for the PSU 19 ..................................................................

Step 9 - Y-axis: rear plate assembly 19 ..........................................................................

Step 10 - Y-axis: geometry check 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 - Installing bearings on the Y-carriage 25 .......................................................

Step 22 - Inserting smooth rods into Y-carriage 26 ....................................................

Step 23 - Y-axis: smooth rods holders 26 .....................................................................

Step 24 - Preparing Y-rod-holder 27 ..............................................................................

Step 25 - Mounting the Y-rod-holder parts 27 .............................................................

Step 26 - Installing the Y-carriage 28 ............................................................................

Step 27 - Aligning the smooth rods 28 ..........................................................................

Step 28 - Assembling the Y-motor pulley 29 ...............................................................

Step 29 - Y-axis: Assembling the belt 29 ......................................................................

Step 30 - Y-axis: Assembling the belt 30 ......................................................................

Step 31 - Y-axis: Assembling the belt 30 .......................................................................

Step 32 - Y-axis: Assembling the belt 31 .......................................................................

Step 33 - Y-axis: Assembling the belt 31 .......................................................................

Step 34 - Y-axis: Assembling the belt 32 ......................................................................

Step 35 - Aligning the Y-axis belt 32 .............................................................................

Step 36 - Tensioning the Y-axis belt 33 ........................................................................

Step 37 - Testing the Y-axis belt 33 ...............................................................................

Step 38 - Haribo time! 34 .................................................................................................

Step 39 - Y-axis is finished! 34 ........................................................................................

3. X-axis assembly 36 ...........................................................................................................

Step 1 - Tools necessary for this chapter 37 .................................................................

Step 2 - X-axis: x-end idler and motor holder 37 .........................................................

Step 3 - X-axis: x-end idler and motor holder 37 .........................................................

Step 4 - X-axis: inserting linear bearings 38 ................................................................

Step 5 - X-end-motor: tensioner assembly 38 .............................................................

Step 6 - X-end-idler: bearing assembly 39 ...................................................................

Step 7 - X-axis: smooth rods preassembly 39 ..............................................................

Step 8 - Marking the bearings 40 ...................................................................................

Step 9 - X-axis: assembly 40 ...........................................................................................

Step 10 - Assembling the X-axis motor pulley (part 1) 41 ...........................................

Step 11 - Assembling the X-axis motor pulley (part 2) 41 ...........................................

Step 12 - X-axis: assembling the motor 42 ...................................................................

Step 13 - Haribo time! 42 ..................................................................................................

Step 14 - X-axis is finished! 43 ........................................................................................

4. Z-axis assembly 44 ............................................................................................................

Step 1 - Tools necessary for this chapter 45 .................................................................

Step 2 - Z-axis: assembling motor holders 45 ..............................................................

Step 3 - Placing the Z-screw covers 45 .........................................................................

Step 4 - Z-axis: assembling the motors 46 ...................................................................

Step 5 - X-axis: trapezoidal nuts (part 1) 46 ..................................................................

Step 6 - X-axis: trapezoidal nuts (part 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-body assembly 53 ..............................................................................

Step 6 - FS-lever assembly 54 ........................................................................................

Step 7 - Steel ball assembly 55 .......................................................................................

Step 8 - Extruder motor parts preparation 56 ..............................................................

Step 9 - Bondtech gear assembly 57 .............................................................................

Step 10 - Bondtech gear alignment 58 ..........................................................................

Step 11 - Extruder-cover part preparation 58 ................................................................

Step 12 - Hotend parts preparation 59 ...........................................................................

Step 13 - Hotend assembly 59 .........................................................................................

Step 14 - Extruder assembly 60 ......................................................................................

Step 15 - X-carriage parts preparation 60 .....................................................................

Step 16 - X-carriage assembly 61 ....................................................................................

Step 17 - Assembling the IR-sensor cable 61 ................................................................

Step 18 - Assembling the X-carriage 62 ........................................................................

Step 19 - Assembling the X-carriage 62 ........................................................................

Step 20 - IR-sensor parts preparation 63 ......................................................................

Step 21 - IR-sensor assembly 64 .....................................................................................

Step 22 - IR-sensor assembly 64 ....................................................................................

Step 23 - Hotend fan parts preparation 65 ...................................................................

Step 24 - Hotend fan cable adjustment 65 ...................................................................

Step 25 - Hotend fan assembly 66 .................................................................................

Step 26 - Hotend fan assembly 66 .................................................................................

Step 27 - Extruder-idler parts preparation 67 ...............................................................

Step 28 - Bearing assembly 67 .......................................................................................

Step 29 - Extruder-idler assembly 68 ............................................................................

Step 30 - Filament alignment check 68 ........................................................................

Step 31 - Extruder-idler mounting 69 ............................................................................

Step 32 - FS-cover parts preparation 69 .......................................................................

Step 33 - FS-cover assembly 70 .....................................................................................

Step 34 - Pretensioning the Extruder-idler 70 .............................................................

Step 35 - Print-fan-support parts preparation 71 .........................................................

Step 36 - Print-fan-support assembly 71 .......................................................................

Step 37 - Fan-shroud parts preparation 72 ...................................................................

Step 38 - Fan-shroud assembly 72 .................................................................................

Step 39 - Print fan parts preparation 73 ........................................................................

Step 40 - Print fan assembly 73 ......................................................................................

Step 41 - SuperPINDA sensor parts preparation 74 ....................................................

Step 42 - SuperPINDA sensor assembly 74 .................................................................

Step 43 - Extruder parts preparation 75 ........................................................................

Step 44 - Extruder preparation and mounting 75 ........................................................

Step 45 - Extruder channels cable management 76 ...................................................

Step 46 - X-axis belt parts preparation 76 ....................................................................

Step 47 - X-axis belt assembly 77 ...................................................................................

Step 48 - X-axis belt 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-back assembly 83 ........................................................................

Step 60 - Mounting the X-carriage-back 83 .................................................................

Step 61 - X-carriage-back assembly 84 .........................................................................

Step 62 - Textile sleeve parts preparation 84 ...............................................................

Step 63 - Tightening the textile sleeve 85 ....................................................................

Step 64 - Tightening the hotend cables 85 ..................................................................

Step 65 - Haribo time! 86 .................................................................................................

Step 66 - E-axis is finished! 86 .......................................................................................

6. LCD assembly 88 ...............................................................................................................

Step 1 - Tools necessary for this chapter 89 .................................................................

Step 2 - Preparing the LCD parts 89 ..............................................................................

Step 3 - Checking the LCD cables 89 ............................................................................

Step 4 - Assembling the LCD supports 89 ...................................................................

Step 5 - Assembling the LCD-cover 90 .........................................................................

Step 6 - Securing the LCD controller 90 .......................................................................

Step 7 - Preparing the supports for assembly 91 .........................................................

Step 8 - Mounting the LCD display onto the printer 91 ..............................................

Step 9 - Assembling the LCD knob 92 ..........................................................................

Step 10 - Haribo time! 92 ..................................................................................................

Step 11 - LCD is done! 93 ..................................................................................................

7. Heatbed & PSU assembly 94 .........................................................................................

Step 1 - Tools necessary for this chapter 95 .................................................................

Step 2 - Heatbed cable assembly (part 1) 95 ................................................................

Step 3 - Heatbed cable assembly (part 2) 95 ...............................................................

Step 4 - Heatbed cable assembly (part 3) 96 ...............................................................

Step 5 - Preparing the heatbed 96 .................................................................................

Step 6 - Preparing the heatbed-cable-cover 97 ...........................................................

Step 7 - Mounting the heatbed-cable-cover 97 ............................................................

Step 8 - Mounting the heatbed-cable-cover 97 ...........................................................

Step 9 - Proper cable management 98 ..........................................................................

Step 10 - Wrapping the heatbed cables 98 ...................................................................

Step 11 - Securing the sleeve in place 99 ......................................................................

Step 12 - Finalizing the wrap 99 .....................................................................................

Step 13 - Preparing the heatbed screws and spacers 100 ..........................................

Step 14 - Mounting the heatbed (part 1) 100 .................................................................

Step 15 - Mounting the heatbed (part 2) 100 ................................................................

Step 16 - Mounting the heatbed (part 3) 101 .................................................................

Step 17 - Mounting the heatbed (part 4) 101 .................................................................

Step 18 - Preparing the PSU parts 102 ...........................................................................

Step 19 - Assembling the PSU 103 .................................................................................

Step 20 - Assembling the PSU 103 ................................................................................

Step 21 - Connecting the power cables (CRITICAL) 104 ............................................

Step 22 - Connecting the power cables 104 .................................................................

Step 23 - Connecting the power cables 105 .................................................................

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 8 - Preparing the Einsy-base (part 1) 112 ..............................................................

Step 9 - Preparing the Einsy-base (part 2) 112 .............................................................

Step 10 - Preparing the Einsy-base (part 3) 113 ...........................................................

Step 11 - Mounting the Einsy-base (part 1) 113 .............................................................

Step 12 - Mounting the Einsy-base (part 2) 114 ............................................................

Step 13 - Mounting the Einsy-base (part 3) 114 ............................................................

Step 14 - Cable management (part 1) 115 ......................................................................

Step 15 - Cable management (part 2) 115 ......................................................................

Step 16 - Cable management (part 3) 116 .....................................................................

Step 17 - Cable management (part 4) 116 ......................................................................

Step 18 - Cable management (part 5) 117 ......................................................................

Step 19 - Cable management (part 6) 117 ......................................................................

Step 20 - Cable management (part 7) 118 .....................................................................

Step 21 - Connecting cable bundles 118 ........................................................................

Step 22 - Connecting the heatbed cable bundle 118 ...................................................

Step 23 - PSU and HB power cables 119 .......................................................................

Step 24 - PSU and HB power cables 120 ......................................................................

Step 25 - PSU and HB power cables 121 .......................................................................

Step 26 - Preparing the PSU cover 121 ..........................................................................

Step 27 - PSU and HB - final check 122 ........................................................................

Step 28 - Cable management 122 ...................................................................................

Step 29 - Connecting the extruder cable bundle 123 ..................................................

Step 30 - Wrapping the cable bundle 123 .....................................................................

Step 31 - Connecting the extruder cable bundle 124 ...................................................

Step 32 - Connecting the LCD cables 124 ....................................................................

Step 33 - Connecting the motor cables 125 ..................................................................

Step 34 - Preparing the zip ties 125 ................................................................................

Step 35 - Hotend cable management (part 1) 126 .......................................................

Step 36 - Hotend cable guiding (part 2) 126 .................................................................

Step 37 - Verify all connections 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 - SuperPINDA adjustment (part 2) 133 .............................................................

Step 3 - SuperPINDA adjustment (part 3) 133 .............................................................

Step 4 - Quick guide for your first prints 134 ................................................................

Step 5 - Printable 3D models 134 ...................................................................................

Step 6 - Prusa knowledge base 135 ................................................................................

Step 7 - Join PrusaPrinters! 135 .......................................................................................

Step 8 - Haribo time! 135 ..................................................................................................

Original Prusa i3 MK3S+ kit assembly 7

1. Introduction

8Original Prusa i3 MK3S+ kit assembly

STEP 1 All the required tools are included

The kit includes:

Needle-nose pliers (1x)

Philips screwdriver (1x)

Allen key (6x)

The printer's package contains a lubricant, which is intended 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 you'll

need that bag (or box).

1. Introduction

Original Prusa i3 MK3S+ kit assembly 9

STEP 3 Use labels for reference

Most of the labels are scaled 1:1 and can be used to identify the part :-)

For the 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.

1. Introduction

10 Original Prusa i3 MK3S+ kit assembly

STEP 5 View high resolution images

When you browse the guide on

help.prusa3d.com, you can view the

original images in high resolution

for clarity.

Just hover your cursor over the

image and click the Magnifier

button ("View original") in the top

left 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 printer with the

certain printed part, please try to

find this label and tell it to our

support team.

1. Introduction

Original Prusa i3 MK3S+ kit assembly 11

STEP 7 We are here for you!

Lost in the instructions, missing screw or cracked printed part? Let us know!

You can contact us using following channels:

Using comments under each step.

Using our 24/7 live chat at shop.prusa3d.com

Writing an email to [email protected]

STEP 8 Pro tip: inserting the nuts

3D printed parts are very precise, however, there still might be a tolerance in the

printed part and same goes for the size of the nut.

Therefore it might happen, 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 insert the screw in, you can remove the tape. Using glue isn't

recommended as it can partly reach into the thread and you won't be able to

tighten the screw properly.

Every time we recommend to use the "screw pulling technique", you will be

reminded with Joe's avatar ;)

Parts in the pictures are used as an example.

1. Introduction

12 Original Prusa i3 MK3S+ kit assembly

STEP 9 Important: Electronics protection

WARNING: Make sure to protect the electronics against electrostatic discharge

(ESD). Always unpack the electronics right before you need them!

Here are some tips to prevent damage to the electronics:

Keep the electronics 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 wool and certain synthetic fabrics can easily gather static

electricity. It is safer to wear cotton clothing.

1. Introduction

Original Prusa i3 MK3S+ kit assembly 13

STEP 10 Reward yourself

Building the MK3S+ printer is a

challenge unlike any other and you

should treat yourself for every

milestone you reach. That is why a

bag of Haribo Bears is included!

The biggest issue from the

previous builds (MK3S, MK2S)

which we had to address was

inadequate bear consumption.

Many of you didn't have 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 professional in the closest candy

store.

Hide the Haribo for now! From our

experience an unattended bag with

sweets tends to suddenly

disappear. We are still investigating

this phenomenon.

1. Introduction

14 Original Prusa i3 MK3S+ kit assembly

STEP 11 How to successfully finish the assembly

To successfully finish the assembly please follow all these:

Always read all the instructions at current step first, it will help you to understand,

what you need to do. Don't cut or trim unless you are told to!!!

Don't follow pictures only! It is not enough, the written instructions are as brief 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 build, have fun. Cooperate with your kids, friends or

partners. However, we take no responsibility for possible fights ;)

READY? You can start the printer assembly in the next chapter 2. Y-axis assembly.

Original Prusa i3 MK3S+ kit assembly 15

2. Y-axis assembly

16 Original Prusa i3 MK3S+ kit assembly

STEP 1 Tools necessary for this chapter

Needle-nose pliers for zip tie

trimming.

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).

2. Y-axis assembly

Original Prusa i3 MK3S+ kit assembly 17

STEP 3 YZ frame - mounting the longer extrusions

Take the LONGER aluminum extrusions and place them next to the frame.

Make sure the engraved PRUSA logo (top left) and the safety sticker (right) on the

frame ARE VISIBLE!

Note: screws are inserted from the opposite side of the frame. If you need to

manipulate with the frame, make sure the extrusions are on the correct side.

Ensure you are using the correct holes, see the second picture. Use the M5 screws

to connect extrusions to the frame. Tighten the screws with the Allen key just

slightly!

Now, tighten the screws fully, but ON 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 side of the frame. If you need to

manipulate with the frame, make sure the extrusions are on the correct side.

Ensure you are using the correct holes, see the second picture. Use the M5x16

screws to connect extrusions to the frame. Tighten the screws just slightly!

Now, tighten the screws fully, but ON A DIAGONAL, see the last picture. As soon

as you finish the first, tighten the second pair. Then proceed to the second short

extrusion.

2. Y-axis assembly

18 Original Prusa i3 MK3S+ kit assembly

STEP 5 YZ frame - final check

Before we proceed further, let's

make a final check. IT IS VERY

IMPORTANT to have extrusions on

the correct side of the frame.

Long extrusions - 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)

PSU holders M3nE (2x)

2. Y-axis assembly

Original Prusa i3 MK3S+ kit assembly 19

STEP 7 Y-axis: front plate assembly

Rotate the frame with longer extrusions towards you.

Place the front plate on the extrusions and secure it with M5x16r screws, DON'T

TIGHTEN them yet!

Now, tighten the screws fully, but ON A DIAGONAL, see the second 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 extrusion. See the picture.

The exact spacing of the PSU holders doesn't matter, we will adjust them later.

2. Y-axis assembly

20 Original Prusa i3 MK3S+ kit assembly

STEP 9 Y-axis: rear plate assembly

Ensure the frame with shorter extrusions is rotated towards you.

Place the rear plate on the extrusions and secure it with M5x16r screws, DON'T

TIGHTEN them yet!

Now, tighten the screws fully, but ON A DIAGONAL, see the second picture. As

soon as you finish the first, tighten the second pair. Then proceed to the second

short extrusion.

STEP 10 Y-axis: geometry check

Before you proceed 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 SURFACE and tighten them again.

IMPORTANT INFO: the printer is capable of self-correcting a certain amount of the

frame skew. Try getting the geometry as best as possible, however, if one of the

corner still keeps lifting up with values up to 2 mm (0.08 inch) you can proceed.

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