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1. Introduction

1. Introduction
Relevant for:
Last updated 9 months ago
1. Introduction
Very easy
 Available languages

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
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

Labels guide
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).

Step 3 Use labels for reference

Use labels for reference
Use labels for reference
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 download it from our site help.prusa3d.com/cheatsheet. Print it at 100 %, don't rescale it, otherwise, it won't work.

Step 4 Spare bag

Spare bag
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.

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 i3 MK3S+ are marked with their version.
A, B, C and 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.

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.
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
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.

Step 10 Reward yourself

Reward yourself
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.

Step 11 How to successfully finish the assembly

How to successfully finish the assembly
How to successfully finish the assembly
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 ;)

Step 12 New vs old frame

New vs old frame
New vs old frame
There are two variations of the printer frame and Y-carriage, each with a different installation procedure.
Take a closer look at the printer frame and choose the appropriate instructions:
NEW frame - there are hexagonal pockets on one side of the part. Go to chapter 2A. Y-axis assembly
OLD frame - flat on both sides of the part. Go to chapter 2B. Y-axis assembly
Images in some chapters can differ slightly depending on the type of the frame used - since the assembly is mostly the same for both types.
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