⬢This manual is for the Enclosure with the external printer display mount. Printed parts for external display mounting are no longer included from the end of May 2024). If you purchased before, you can continue with this manual.

⬢If you prefer to keep the display inside (on the printer), refer to the Original Prusa Enclosure (display inside) assembly manual.

⬢Do you want to install the display externally and have a new package without the required parts? You can download and print them.

⬢To confirm your package: check the ENCLOSURE 1/2 Plastic Parts package label to see if it includes the ENCLOSURE LCD SUPPORT or ENCLOSURE XLCD SUPPORT parts.

⬢Needle-nose or cutting pliers (to trim the zip ties)

⬢Phillips screwdriver PH2

⬢Cardboard box at least 15 x 15 x 8 cm (e.g. Prusament box)

⬢Snip-off knife or a pocket knife

⬢Piece of cloth (to protect the heatbed, min. 15 x 15 cm)

⬢3.0mm Allen key (MK3S+ Silver PSU only)

⬢All the boxes and bags including parts for the build are labelled.

⬢The FASTENERS A and FASTENERS B bags include an extra spare of each part contained in the bag. The amount of spare parts is always written on the label under the individual part. This number is included in the total number of each type of part.

The amount of the nylon rivet spare might slightly differ, but never less than the amount indicated on the label.

⬢Fasteners on the labels has a scale of 1:1 and can be used to identify parts :-)

The numbers in parentheses below the fastener picture indicate the number of extra pieces added to the SPARE package.

⬢For the most common screws and nuts 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.

⬢From the experience of building Original Prusa printers, we know that Haribo Bears are an integral and important part of every kit. Although it's not entirely about building a printer now, we've got your safety in mind, and added some amount of gummy bears to your kit as well.

⬢Open the package and arrange the gummy bears according to the picture. Don't eat anything now! Always wait for instructions.

Your package might contain fewer bears. In such a case, run immediately to the nearest candy store! The exact dosage is absolutely critical!!!

⬢Eat the first gummy bear to boost your energy. Really, just one!

For a better handling, it is recommended to prepare a clean workbench with a space of at least 0.8 m x 0.8 m (31.5 in x 31.5 in). With access from two sides or more.

We're recommending a bright light above your workbench. Some parts inside the enclosure are dark and inadequate light could make a very difficult procedure.

⬢Always read all the instructions at the current step first. This 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 can be. Read them.

⬢Read the comments from the other users. They are a 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.

⬢We have designed enhancements that are not shipped by default in the kit, but you can print them out and add them to the enclosure during assembly. Fasteners are already included in the kit.

⬢To see the full list of the parts, please visit our collection at Printables.com.

If you've upgraded your printer to the MK4/S or MK3.9/S, you'll need to print a pair of xLCD supports for the Enclosure.

⬢First, print the xLCD supports. Then, proceed with the Enclosure assembly.

⬢The instructions in this manual are intended for the original injection molded spool holder ("T" design) shipped with your printer.

⬢If you don't have the injection molded design, print the spool holder from our collection at Printables.com.

⬢Lost in the instructions? Missing screw or cracked printed part? Let us know!

⬢You can contact us using following channels:

The MK3S+ has two types of the PSU (Power Supply Unit). There are different instructions for each type of the PSU.

⬢Got MK4/S & 3.9/S? Now follow the chapter 2C. Preparing the printer (MK4/S & 3.9/S