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1. Introduction

1. Introduction
Relevant for:
Last updated 4 days ago
1. Introduction
 Difficulty
Very easy
 Steps
12
 Available languages
CSPLDEESITFRJA

Step 1 All the required tools are included

All the required tools are included
All the required tools are included
All the required tools are included
All the required tools are included
The tool package can be found in the Fasteners & ELE box. The tool package includes:
Needle-nose pliers (1x)
Philips (PH2) screwdriver (1x)
Universal wrench (1x)
Wrench size 13 mm (1x)
Allen key set
Torx key set
Lubricant (included in Fasteners & ELE box)

Step 2 Additional utilities for this guide

Additional utilities for this guide
Additional utilities for this guide
Additional utilities for this guide
Additional utilities for this guide
Some steps in the manual will require commonly available items to help you with assembly (not included in the kit):
Scissors - For cutting a bag with bearings
Permanent marker - choose black or another dark color. The marker will come in handy a few chapters further, for marking bearings and magnets.
Paper towels or piece of cloth - For wiping residual grease off the bearings and smooth rods and as a soft pad for preparing the Y-carriage assembly.
No soldering or wire crimping is required.

Step 3 Labels guide

Labels guide
Labels guide
Labels guide
All the boxes and bags including parts for the build are labeled.
The labels include the list of contents and part count.
You can download a Cheatsheet with 1:1 fastener drawings from our site prusa.io/cheatsheet-mk4. Print it at 100 %, don't rescale it, otherwise, it won't work.
For PRUSA veterans: Fasteners are divided into individual bags according to its type. Not into packages for individual chapters, as it was with previous printers.

Step 4 Spare bag

Spare bag
Spare bag
Spare bag
There is a bag with spare parts like thermal pads, springs, etc.
Spare fasteners are included in each bag of fasteners. The numbers in parentheses below the fastener picture indicate the number of extra pieces added to the SPARE package.

Step 5 View high resolution images

View high resolution images
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

Printed parts - versioning
Printed parts - versioning
Most of the 3D printed parts on Original Prusa MK4 are marked with their version.
E, F and Gx series (e.g. E1) - those parts are printed on Prusa Research farm and are distributed with the kit.
R, S and Tx series (e.g. R1) - those parts are available for download at prusa.io/printable-parts-mk4. 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.

Step 7 We are here for you!

We are here for you!
We are here for you!
We are here for you!
Lost in the instructions, missing screw or cracked printed part? Let us know!
You can contact us using the following channels:
Using comments under each step.
Using our 24/7 live chat here at help.prusa3d.com
Writing an email to [email protected]

Step 8 Pro tip: inserting the nuts

Pro tip: inserting the nuts
Pro tip: inserting the nuts
Pro tip: inserting the nuts
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.
Alternative option: you can use X-holder tool included in the package. Insert any screw (typically: M3x10 or M3x18) and screw the nut fully on the tip of the thread. Push the nut into the printed part and remove the screw with X-holder.
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.

Step 9 Important: Electronics protection

Important: Electronics protection
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 only while handling it. Avoid touching the components on the surface.
Before you touch the electronics use any conductive (metal) structure nearby to neutralize the possible static charge from your hands.
Be extra cautious in rooms with carpets, which are often a source of electrostatic energy.
Clothes made of wool or certain synthetic fabrics can easily gather static electricity too. It is safer to wear cotton clothing for the assembly.

Step 10 Reward yourself

Reward yourself
Reward yourself
Based on the feedback, building the MK4 printer is even more enjoyable compared to the MK3S+. However, you should still treat yourself for every finished chapter. Look in the box and find bag of Haribo Bears.
The biggest issue from our experience (MK3S+, MK3S, MK3, MK2S, ...) is inadequate bear consumption. Many of you didn't have enough gummy bears for all chapters, some even ate them all before they started!
After years of thorough scientific research, we came to a solution => At the end of each chapter, you will be told a specific amount of bears to consume.
Eating incorrect amount than prescribed in the manual might lead to sudden boost of energy. Please consult a professional in the closest candy store.
Hide the Haribo for now! From our experience an unattended bag with sweets will suddenly disappear. Confirmed by multiple cases all around the World.

Step 11 How to successfully finish the assembly

How to successfully finish the assembly
How to successfully finish the assembly
To successfully finish the MK4 kit 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.

Step 12 Prepare your desk

Prepare your desk
Prepare your desk
Tidy up your desk! Tidying up decreases the probability of losing small parts.

Clear your workspace. Make sure you have enough room. A nice clear flat workbench will get you the results you are aiming for.

Let there be light! Make sure you are in a well-lit environment. Another lamp or even an extra flashlight will probably come in handy.

Prepare something to contain the plastic bags and the removed packing materials so you can recycle them afterwards. Make sure there are no important parts being discarded.

OK, we are ready. Let's start! Go to chapter 2. Frame assembly
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