AA

Featured products

    Popular categories

      Trending searches

        Articles

          Blog

            Products

              Categories

                Suggested searches

                  Searching…
                  No results
                  Something went wrong.
                  ↑↓ Select↵ OpenEsc Close search
                  • English
                  • Čeština
                  • Deutsch
                  • Español
                  • Français
                  • Italiano
                  • Polski
                  • 日本語
                  • Orders
                  • Address
                  • In-stock Alerts
                  • My Courses
                  • Subscription
                  • Edit Account
                  • 3D printers9+▾

                    3D printersnew

                    newPrusa CORE One L+Learn more
                    newPrusa CORE One+ (Gen 2)Learn more
                    newPrusa CORE One L+ INDX 8-ToolnewPrusa CORE One+ (Gen 2) INDX 8-ToolPrusa CORE One L+: Critical InfrastructureOriginal Prusa MK4SnewOriginal Prusa XL+Original Prusa XL+: Critical Infrastructure

                    Printer upgrades

                    newINDX Conversion KitsnewPrusa CORE One L to CORE One L+ upgradenewPrusa CORE One+ to Prusa CORE One+ (Gen 2)newPrusa XL to Prusa XL+ Upgrade
                    Prusa Reward ProgramLove your Prusa printer? Share your experience and earn $30 Prusa e-shop vouchers.
                    How to Choose a 3D Printer?We’ll walk you through the basics to find the exact machine for your space, budget, and ideas.
                    Free E-bookDownload a free e-book Basics of 3D Printing with Josef Prusa and make your first steps in 3D printing world
                    Original Prusa Printable PartsCollections of printable spare parts for Original Prusa 3D printers and upgrades.
                    Shipping informationRegularly updated info about the current manufacturing capacity and delivery times of our printers.
                    Custom 3D PrintingProfessional custom 3D printing from various materials according to your requirements.
                  • Materials▾

                    Filaments

                    PrusamentPLAPETGASA / ABSPC (Polycarbonate)PA (Nylon)FlexCompositesSpecialMaterials clearance sale

                    Resin

                    Prusament ResinResin Cleaner
                    Filament GuideCheck my Prusament Spool
                    Prusament.com
                  • Parts & Accessories▾

                    Accessories

                    EnclosuresNozzlesPrint SheetsEssential AccessoriesCameras & AddonsTools & CraftingAdhesives

                    Spare parts

                    Merchandise

                    Spare parts - All PrintersCORE OneMK4/S & MK3.9/SMK3/S/+XL
                    Merch
                  • For Business▾
                    Prusa Pro HT90Prusa Pro SLXPrusa Pro AFSPrusa Pro Medical OneOriginal Prusa XL+Original Prusa XL: Critical Infrastructure
                    Prusa CORE One+ (Gen 2)Learn more
                    Prusa CORE One L+Learn more
                    Prusa CORE One L: Critical Infrastructure Edition

                    3D Printing for

                    Manufacturing and R&DAutomotive IndustryHealthcareEducation and Academic ResearchArchitects and DesignersFilm IndustryCritical Infrastructure

                    3D Printing Stories

                    • How 3D printing started: About Rep-rap and open-source with Adrian Bowyer
                    • Teaching mathematics redefined with 3D printing at JKU Linz
                    • The story behind the LTT screwdriver
                    • Victoria Hand Project: Changing Prosthetic Care with 3D Printing
                    Official Prusa Resellers
                    Sustainability
                    Prusa Education
                    Contact and Inquiry
                    Custom 3D Printing
                    ISO Certified
                  • Software▾
                    PrusaSlicer

                    PrusaSlicerPrusaSlicer

                    PrusaSlicer is an open-source, feature-rich, frequently updated tool that contains everything you need to export the perfect print files for your 3D printer.

                    WindowsMacOSLinux
                    Prusa Connect

                    Prusa Connect

                    Prusa Connect is a cloud service enabling remote control and monitoring of your 3D printers, offering secure data handling, easy setup, and support for managing multiple printers from anywhere.

                    Log in to Connect
                    Prusa.app

                    Prusa.app

                    Control your printer/s remotely from anywhere using the Prusa Connect technology behind. Prusa.app brings a new level of Prusa printer experience to Android and iOS phones.

                    Try it now!
                    Drivers & FirmwareDownload the latest firmware and drivers for your 3D printer.
                    PrusaSlicer Support
                    Prusa Connect Support
                  • 3D Models▾
                    3D PrintersArt & DesignHobby & MakersHouseholdTabletop MiniaturesToys & GamesPrintables Store

                    Popular 3D models

                    • SQUATCHEE-SPIN
                    • The Over-engineered Backpack Wall Mount V2
                    • Black Hole Lamp
                    • Strong garden hose holder
                    • Prusa Spool Bot
                    • Build Tray — Modular Organizer for Assembly, Disassembly and Maintenance

                    Design Contests

                    • Framework Laptop 12 Mainboard Re-Use9/1/2026 – 9/30/2026
                    • 🏆 Designer Challenge: Magic tricks!9/1/2026 – 9/22/2026
                    • Makeup Organizers9/4/2026 – 9/20/2026
                  • Community▾

                    Upcoming Events

                    • 3D Printopia 20269/26/2026 – 9/27/2026 · Pennsylvania, United States · Prusa Team
                    • Maker Faire Bay Area9/25/2026 – 9/27/2026 · Kalifornie, United States · Prusa Team
                    • Hobby Messe10/2/2026 – 10/4/2026 · Sachsen, Germany · Prusa Team
                    • Mezinárodní strojírenský veletrh10/6/2026 – 10/9/2026 · Jihomoravský kraj, Czechia · Prusa Team

                    Prusa Forum

                    • nextruder stepper motor clicking and ticking, even without gearbox
                    • Sagging bondtech extruder cable
                    • Print quality issues suddenly
                    Prusa World MapPrusa World MapFind local 3D printing users and explore the community around you.
                  • Help▾
                    Guides & TutorialsPrusaSlicerPrusa ConnectMaterials

                    Printer Model

                    CORE One INDXCORE One LCORE One+CORE One

                    Hardware Troubleshooting

                    • Selftest failed (CORE One/+)
                    • Clogged nozzle (CORE One, CORE One L, XL, MK4/S, MK3.9/S)
                    • Adjusting belt tension (CORE One/+, CORE One INDX, CORE One L/+)
                    • Prusa Connect and PrusaLink explained

                    Drivers & Firmware

                    INDX familyCORE One familyMK4 familyXL familyMMU familyPRO family
                  • Courses▾

                    Become an expert in 3D printing

                    Prusa Academy offers online courses on various 3D printing related topics. Each course features:

                    • easy-to-read text with many pictures and short videos
                    • links for inspiration and further study
                    • quizzes for testing your knowledge along the way
                    • certificate of completion
                    Browse all coursesMy courses library
                    • 3D Modeling in Autodesk Fusion
                    • PrusaSlicer Masterclass – Beginner to Advanced
                    • Complete Guide to 3D Print Postprocessing, Painting, and Detailing
                    • Beginner's Guide to Blender for 3D Printing: Edit and Remix STLs
                  • Blog▾
                    • Prusament PLA ColorMix: Print 45 color shades using just five filament spools (and more)
                    • Back-to-School 2026 Deals Are Here!
                    • PrusaSlicer 3.0 Preview – Built for the Future of 3D Printing
                    E-Book: Basics of 3D Printing
                  • Company▾

                    About Prusa Research

                    We are the largest maker of 3D printers in Europe and the United States.

                    Founded as a one-man startup in 2012 by Josef Prusa, a Czech hobbyist, maker, and inventor. In just 15 years, we've grown into a company of more than 1,200 people. Every month, we design, build, and ship over 10,000 innovative and secure 3D printers from our headquarters in Prague, Czech Republic, and Delaware, USA, to users in more than 160 countries.

                    Watch a video and find out how Prusa Research was born and what we achieved within only 10 years!

                    About UsTimelineSustainabilityOpen-source
                    About Us
                    Contact Us
                    Logo and Photos
                    ISO Certified
                  3. Support
                  5. Printer troubleshooting
                  7. Uneven bed #31111 (CORE One) #35111 (CORE One L) #36111 (CORE One INDX)
                   

                  Contents

                  • What happened?
                  • How to fix it?

                  Blog

                  • Prusament PLA ColorMix: Print 45 color shades using just five filament spools (and more)
                  • Back-to-School 2026 Deals Are Here!
                  • PrusaSlicer 3.0 Preview – Built for the Future of 3D Printing

                  Newsletter

                  Signup and get our monthly squeeze on updates, blog, printables and much more.

                  By clicking, you agree to receive our newsletter.

                  This site is protected by reCAPTCHA Enterprise and the Google Privacy Policy and Terms of Service apply.

                  SQUATCHEE-SPIN
                  E-shop
                  • 3D Printers
                  • Printer Upgrades
                  • Filaments
                  • Accessories
                  • Prusa Merchandise

                  © Prusa Research a.s.

                  Printables
                  • 3D Models
                  • Store
                  • Clubs
                  • 3D Design Contests
                  • Brands
                  Community
                  • World Map
                  • Forum
                  • User Groups
                  • Events
                  Help
                  • Prusa Help
                  • Prusa Academy
                  • 3D Printing Calculators
                  Software
                  • PrusaSlicer
                  • Prusa.app
                  • Prusa Connect
                  • Drivers and Software
                  Company
                  • About Us
                  • Blog
                  • Official Prusa Resellers
                  • Contact Us
                  • Certified for ISO 9001, ISO 14001, ISO 45001
                  • General Terms and Conditions
                  • General Terms and Conditions of Use of the PRUSA Websites
                  • Privacy Policy
                  • Information about cookies
                  • Customer Complaints Policy
                  • Status Page
                  • Do Not Sell or Share My Personal Information
                  • Supplemental Statements
                  • General Terms and Conditions
                  • General Terms and Conditions of Use of the PRUSA Websites
                  • Privacy Policy
                  • Information about cookies
                  • Customer Complaints Policy
                  • Status Page
                  • Do Not Sell or Share My Personal Information
                  • Supplemental Statements

                  © Prusa Research a.s.

                  JOSEF PRUSA®, PRUSA RESEARCH®, PRUSA POLYMERS®, PRUSA ORANGE®, PRUSA 3D ® AND PRUSAMENT® are registered trademarks of Prusa Development a.s. used by Prusa Research a.s. under licence from Prusa Development a.s.

                  Uneven bed

                  #31111 (CORE One) #35111 (CORE One L) #36111 (CORE One INDX)

                  Relevant for

                  CORE One
                  CORE One L
                  CORE One+
                  CORE One INDX
                  CORE One L+
                  22 comments
                  Article is also available in following languages
                  English
                  Čeština
                  Polski
                  Deutsch
                  Français
                  Español
                  Italiano
                  日本語

                  What happened?

                  The printer is showing the message "The bed doesn't seem to be aligned properly. Run Z alignment procedure?" before printing.

                  Error name: Uneven bed

                  Error code: #31111 (CORE One) #35111 (CORE One L) #36111 (CORE One INDX)

                  This message is shown when different parts of the print surface are not aligned with each other.

                  How to fix it?

                  Go to the printer menu to Control -> Calibrations & tests -> Z alignment calibration. After the calibration, the printer will ask if you wish to finish the tests, click on Quit.

                  If the issue persists, move the bed down, open the trapezoid nuts, and check if they can move freely along the threaded rods.

                  It is also possible to lubricate the Z-axis lead screws as instructed in the printer's regular maintenance guide under "Axes check - Z-axis leadscrews"

                  • CORE One maintenance
                  • CORE One L maintenance
                  Rear motorFront left motorFront right motor
                  Was this article helpful?
                  This action is available only to registered users. Please log-in.

                  Topics

                  • Troubleshooting
                    • Printer troubleshooting
                      • Multimeter usage
                      • Toolchanger error #17135 (XL) #36135 (CORE One INDX)
                      • Bed thermal runaway #31203 (CORE One) #35203 (CORE One L) #36203 (CORE One INDX) #26203 (MK4S) #13203 (MK4) #27203 (MK3.9S) #21203 (MK3.9) #28203 (MK3.5S) #23203 (MK3.5) 
                      • Hotend thermal runaway #31204 (CORE One) #35204 (CORE One L) #26204 (MK4S) #13204 (MK4) #27204 (MK3.9S) #21204 (MK3.9)
                      • Bed mintemp error #31207 (CORE One) #35207 (CORE One L) #36207 (CORE One INDX) #26207 (MK4S) #13207 (MK4) #27207 (MK3.9S) #21207 (MK3.9) #28207 (MK3.5S) #23207 (MK3.5)
                      • Bed maxtemp error #31205 (CORE One) #35205 (CORE One L) #36205 (CORE One INDX) #26205 (MK4S) #13205 (MK4) #27201 (MK3.9S) #21201 (MK3.9) #28201 (MK3.5S) #23201 (MK3.5)
                      • Homing error Y #31305 (CORE One) #35305 (CORE One L) #36305 (CORE One INDX) #17305 (XL)
                      • Heatbed Port Overcurrent #31309 (CORE One) #35309 (CORE One L) #26309 (MK4S) #13309 (MK4) #27309 (MK3.9S) #21309 (MK3.9) #28309 (MK3.5S) #23309 (MK3.5) #12309 (MINI) #36309 (INDX)
                      • MMU Overcurrent #31310 (CORE One) #35310 (CORE One L) #26310 (MK4S) #13310 (MK4) #27310 (MK3.9S) #21310 (MK3.9) #28310 (MK3.5S) #23310 (MK3.5)
                      • I2C Send failed #31311 (CORE One) #35311 (CORE One L) #36311 (CORE One INDX) #26311 (MK4S) #13311 (MK4) #27311 (MK3.9S) #21311 (MK3.9) #28311 (MK3.5S) #23311 (MK3.5) #12311 (MINI/+)
                      • Loadcell Bad Configuration #31527 (CORE One) #35527 (CORE One L) #36527 (CORE One INDX) #26527 (MK4S) #13527 (MK4) #27527 (MK3.9S) #21527 (MK3.9)
                      • Loadcell Timeout #31528 (CORE One) #35528 (CORE One L) #26528 (MK4S) #36528 (CORE One INDX) #13528 (MK4) #27528 (MK3.9S) #21528 (MK3.9)
                      • Heatbreak MINTEMP Error #31211 (CORE One) #35211 (CORE One L) #26211 (MK4S) #13211 (MK4) #27211 (MK3.9S) #21211 (MK3.9)
                      • Nextruder filament sensor (CORE One, CORE One L, MK4/S, MK3.9/S, XL/+)
                      • Blue Screen of Death (BSOD) #31538 (CORE One) #35538 (CORE One L) #36538 (CORE One INDX) #26538 (MK4S) #13538 (MK4) #27538 (MK3.9S) #17538 (XL) #21538 (MK3.9) #28538 (MK3.5S) #23538 (MK3.5) #12538 (MINI)
                      • Stuck filament detection #31101 (CORE One) #35101 (CORE One L) #26101 (MK4S) #13101 (MK4) #27101 (MK3.9S) #21101 (MK3.9) #17108 (XL)
                      • Heatbed temp not matching #31209 (CORE One) #35209 (CORE One L) #26209 (MK4S) #13209 (MK4) #27209 (MK3.9S) #21209 (MK3.9) #28209 (MK3.5S) #23209 (MK3.5)
                      • Under-extrusion (Nextruder printers)
                      • Nozzle Timeout #31819 (CORE One) #35819 (CORE One L) #36819 (CORE One INDX) #26819 (MK4S) #13819 (MK4) #27819 (MK3.9S) #21819 (MK3.9) #28819 (MK3.5S) #23819 (MK3.5) #17819 (XL) #12819 (MINI)
                      • Uneven bed #31111 (CORE One) #35111 (CORE One L) #36111 (CORE One INDX)
                      • Filament sensor stuck #31113 (CORE One) #35113 (CORE One L) #36113 (CORE One INDX) #17113 (XL) #26113 (MK4S) #13113 (MK4) #27113 (MK3.9S) #21113 (MK3.9) #28113 (MK3.5S) #23113 (MK3.5) #12113 (MINI/+)
                      • Chamber MAXTEMP error #31214 (CORE One) #35214 (CORE One L) #36214 (CORE One INDX)
                      • Homing error X #31304 (CORE One) #35304 (CORE One L) #36304 (CORE One INDX) #17304 (XL)
                      • Puppy error #31511 (CORE One) #35511 (CORE One L) #36511 (CORE One INDX)
                      • Puppy error #31513 (CORE One) #35513 (CORE One L) #36513 (CORE One INDX)
                      • Fil. sensor troubleshooting #31114 (CORE One) #26114 (MK4S) #13114 (MK4) #27114 (MK3.9S) #21114 (MK3.9) #28114 (MK3.5S) #23114 (MK3.5)
                      • Chamber Mintemp error #31215 (CORE One) #35215 (CORE One L) #36215 (CORE One INDX)
                      • MCU in Buddy is overheated #31825 (CORE One) #35825 (CORE One L) #26825 (MK4S) #27825 (MK3.9S) #28825 (MK3.5S) #13825 (MK4) #21825 (MK3.9) #23825 (MK3.5) #17825 (XL) #12825 (MINI)
                      • The heatbed cooled down during the power outage #31808 (CORE One) #35808 (CORE One L) #26808 (MK4S) #27808 (MK3.9S) #28808 (MK3.5S) #13808 (MK4) #21808 (MK3.9) #23808 (MK3.5) #17808 (XL) 
                      • The G-code isn't fully compatible #31803 (CORE One) #26803 (MK4S) #27803 (MK3.9S) #28803 (MK3.5S) #13803 (MK4) #21803 (MK3.9) #23803 (MK3.5) #17803 (XL) #12803 (MINI)
                      • Filament not detected #31804 (CORE One) #35804 (CORE One L) #26804 (MK4S) #27804 (MK3.9S) #28804 (MK3.5S) #13804 (MK4) #21804 (MK3.9) #23804 (MK3.5) #17804 (XL) #12804 (MINI)
                      • Print preview unfinished selftest #31801 (CORE One) #35801 (CORE One L) #26801 (MK4S) #27801 (MK3.9S) #28801 (MK3.5S) #13801 (MK4) #21801 (MK3.9) #23801 (MK3.5) #17801 (XL) #12801 (MINI)
                      • Crash recovery axis long #31809 (CORE One) #35809 (CORE One L) #26809 (MK4S) #13809 (MK4) #27809 (MK3.9S) #21809 (MK3.9) #28809 (MK3.5S) #23809 (MK3.5) #17809 (XL) #12809 (MINI)
                      • Crash recovery repeated crash #31811 (CORE One) #35811 (CORE One L) #26811 (MK4S) #13811 (MK4) #27811 (MK3.9S) #21811 (MK3.9) #28811 (MK3.5S) #23811 (MK3.5) #17811 (XL) #12811 (MINI)
                      • Crash recovery axis short #31810 (CORE One) #35810 (CORE One L) #26810 (MK4S) #13810 (MK4) #27810 (MK3.9S) #21810 (MK3.9) #28810 (MK3.5S) #23810 (MK3.5) #17810 (XL) #12810 (MINI)
                      • Crash recovery home fail #31812 (CORE One) #35812 (CORE One L) #26812 (MK4S) #13812 (MK4) #27812 (MK3.9S) #21812 (MK3.9) #28812 (MK3.5S) #23812 (MK3.5) #17812 (XL) #12812 (MINI)
                      • Loading obstruction #31119 (CORE One) #35119 (CORE One L) #17119 (XL)
                      • Homing calibration needed #31118 (CORE One) #35118 (CORE One L) #36118 (CORE One INDX)#17118 (XL)
                      • Calibrate homing from menu #31120 (CORE One) #35120 (CORE One L) #36120 (CORE One INDX) #17120 (XL)
                      • MCU overheat #35270
                      • PCB overheat #35271
                      • Data Timeout #35330
                      • AC Controller Fault #35273
                      • AC controller fault #35333 (CORE One L)
                      • AC controller fault #35335 (CORE One L)
                      • AC controller fault #35336 (CORE One L)
                      • Selftest failed (CORE One L/+)
                      • Bed fan is not spinning #35849 (CORE One L)
                      • PSU fan is not spinning #35850 (CORE One L)
                      • Nozzle tool remains attached to the print head (CORE One INDX)
                      • Selftest failed (CORE One/+)
                      • Clogged nozzle (CORE One, CORE One L, XL, MK4/S, MK3.9/S)
                      • Adjusting belt tension (CORE One/+, CORE One INDX, CORE One L/+)
                    • Diagnostics
                    • Print Quality Troubleshooting
                    • QR Error codes
                    • Print Error Messages

                  9 comments

                  Log in  to post a comment
                  daftcashew
                  •
                  I followed the link to the CORE One maintenance page, but there is no section labeled "Axes check - Z-axis leadscrews" to be found there.
                  Reply
                  Felipe
                  •
                  Same. I get errors about the bed being uneven and needing to run Z alignment procedures every couple prints and I would love to actually follow all the troubleshooting steps but they don't exist.
                  Reply
                  Deere112
                  •
                  My printer is randomly believes the bed is out of level also. It does look like the heater whip hits the z stop up top on very large prints. I have zero issues with smaller parts. It is VERY annoying. I think the top Z stop needs more clearance for the cable.
                  Reply
                  Nate
                  •
                  Did you assemble the printer yourself? When I assembled my CORE One+, I routed the cable bundle from the Heatbed above the metal Heatbed Carriage, and this caused it to hit the Z stop in the back, causing the Z-Axis to stop moving up in the back but not in the front, so the bed would be unlevel. This is an easy fix as it only required moving the axis down and removing a few of the screws from the back panel on the bottom from the inside of the printer, and then just pushing the cable bundle below the carriage.
                  Reply
                  Lu i
                  •
                  My problem is that the back of the bed is hanging to low, because it does not properly seat itself in the bed-stop-rear. I am currently trying to fix it, but it is weird
                  Reply
                  Junk3rs
                  •
                  I just received my Core One L and went through all of the setup and first calibrations with everything passing until the first print and end up with bed leveling failed every time and this is my same problem with no luck fixing and support isnt helping. not quite sure what do as it doesnt give any error codes... i thought this was supposed to print right out of the box? i built my Xl from a million pieces and didnt even have these kinds of problems. and support is also no help...
                  Reply
                  Jan Kratochvíl
                  •
                  Hello. Please be more specified what you tried. I remember one case that has the same problem by having the heatbed cable in front of the rear Z axis instead of behind it.
                  Reply
                  Udp53
                  •
                  First thing to check: look under the bed for stray objects. A spare nozzle I'd left under there was my entire problem.
                  Reply
                  Albert Lozano
                  •
                  One possible cause of Core One print bed misalignment is wear in one or more POM trapezoidal nuts, which prevents correct Z calibration. This can occur when a MK4S-to-Core One upgrade kit is installed and the two trapezoidal nuts from the MK4S are reused, as they may already have some prior wear.
                  Reply