Original Prusa MK4S: Official Instructions
Handbook version 1.00 - August 2nd, 2024
If you need to download this handbook in other languages, such as Deutsch, Français,
Italiano, Español, Čeština, and Polski, visit https://prusa.io/mk4s or scan the QR code on
the right. This link will also take you to a hub containing the latest downloads (firmware,
handbook, drivers, PrusaSlicer) and help articles.
In this handbook, you will learn everything you need to set up your printer, use it, perform
routine maintenance, and more. Assembly instructions, along with other useful information,
can be found at prusa.io/mk4s.
The handbook primarily references the Original Prusa MK4S, as it is virtually identical to
the MK3.9S from the user's perspective. Therefore, the instructions provided are equally
applicable to the MK3.9S.
Quick Guide to the First Print
Read the Safety Instructions carefully (page 8).1.
Place the printer on a flat and stable surface and plug it in. (page 15)2.
If you bought the assembled printer, remove the test print from the print sheet (remove the3.
sheet, bend it, remove the print), then place the print sheet back (page 17).
Calibrate the printer using the Selftest Wizard. (page 18)4.
Insert the USB drive that came with your printer and print your first object. (page 23)5.
Tips, advice or important information that will help you when working with the printer.
This part of the text is very important, please read it carefully! It is directly related to the correct
operation of the printer and its safe operation.
This information applies to the Original Prusa MK4S 3D printer assembly kit.
How to contact Prusa Research technical support:
First, check the last sections of this manual that deal with common problems, or go to
prusa.io/mk4s (you can also scan the QR code at the top of the page) for a complete list of the
most common problems and solutions. If your problem is not listed here, or the solution does
not work, please send an email to info@prusa3d.com and/or use our chat at prusa3d.com. Try
to describe your problem as accurately as possible and include pictures or videos.
JOSEF PRUSA®, PRUSA RESEARCH®, PRUSA POLYMERS®, PRUSA ORANGE®, ORIGINAL PRUSA®, PRUSA 3D®, and PRUSAMENT® are registered trademarks of Prusa Development a.s. used by
Prusa Research a.s. under license from Prusa Development a.s. | JOSEF PRUSA, ORIGINAL PRUSA, and PRUSAMENT are registered trademarks (or trademark applications) of Prusa Development a.s.
and are used by Prusa Research a.s. under license from Prusa Development a.s. in the following countries: Australia, New Zealand, Israel, Mexico, South Korea, Turkey, Ukraine, Russia, Kazakhstan,
Switzerland, China, Colombia, Uzbekistan, Philippines and Norway. | All other company names and product names mentioned in this publication are trademarks and registered trademarks of their
respective companies.
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