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Parts

  1. The kit includes: Needle-nose pliers (1x)
    • 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 Printer maintenance tips

    • No soldering is required.

    • No wire crimping is required.

  2. All the boxes and bags including parts for the build are labelled.
    • 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).

  3. 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.
    • 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 Prusa Cheatsheet from our site. Print it at 100 %, don't rescale it, otherwise it won't work.

  4. Every type of fastener is included in a separate special bag.
    • Every type of fastener is included in a separate special bag.

    • If you lose a screw when building, use one from this bag.

  5. When you browse the guide on manual.prusa3d.com, you can view the original  images in high resolution for clarity.
    • When you browse the guide on manual.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.

  6. Most of the 3D printed parts on  Original Prusa i3 MK3S are marked with their version.
    • Most of the 3D printed parts on Original Prusa i3 MK3S are marked with their version.

    • Cx series (e.g. C1) - those parts are printed on Prusa Research farm and are distributed with the kit.

    • Rx series (e.g. R4) - those parts are available for download and printing by the user. 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.

  7. Lost in the instructions, missing screw or cracked printed part? Let us know! You can contact us using following channels:
    • 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 info@prusa3d.com

  8. 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.
    • 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.

  9. 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:
    • 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.

  10. 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!
    • 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 (MK3, 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.

  11. 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!!!
    • 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 by assembling Y-axis in the next chapter - 2. Y-axis assembly

Finish Line

1287 other people completed this guide.

Jakub Dolezal

Member since: 02/20/2017

225 Guides authored

Team

Prusa Research Member of Prusa Research

Community

3 Members

367 Guides authored

28 Comments

The gummy bear rations was a great investment into Research and Development! Chapter 1 down and many of hours of hard work to come!

Jose Horta - Reply

Yeah, so the gummy bears….. should have a note to say that’s AFTER completion, my wife and son ate them first sooooo there’s that :-)

matthew burgos - Reply

Well I guess you should ask them for a replacement :) :)

Martin L. - Official Prusa CS -

Did your wife and son help with the build? The gummy’s are for assemblers only. All others must find other sustenance. :)

Ken biles -

The gummy bears hahahaha.

Juan Emilio León - Reply

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