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Prusa Research CORE ONE Handbook

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ENG
3D PRINTING
HANDBOOK
FOR THE PRUSA CORE ONE 3D PRINTER

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Summary of Contents for Prusa Research CORE ONE

  • Page 1 3D PRINTING HANDBOOK FOR THE PRUSA CORE ONE 3D PRINTER...
  • Page 2 Research a.s. under license from Prusa Development a.s. | JOSEF PRUSA, 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,...

  • Page 3: About The Author

    About the Author Josef Průša (*23. 2. 1990) became interested in 3D printing when he began studying at the University of Economics in 2009 - it started off as a hobby, a new technology open to modifications and improvements. The hobby quickly became his passion, and Josef became one of the main developers of the international open-source (all works are freely available for any use) RepRap project by Adrian Bowyer.

  • Page 4: Table Of Contents

    3.2. Connecting the LCD - Schematics ....................3.3. Reversing the Door Orientation ......................3.4. Connecting and Disconnecting the Power Cable ..............4. Prusa CORE One Overview and Glossary ....................5. Your First Print ..............................5.1. Basic controls .............................. 5.2. Preparing Flexible Print Sheets ......................
  • Page 5 9.1.6. Printing Objects Larger than the Print Volume .............. 9.1.7. Printing Multicolored Objects (without MMU3) ............. 9.1.8. Slicing and Exporting ......................... 10. Material Guide ..............................11. Regular Maintenance ............................11.1. Flexible Print Sheets ..........................11.1.1. Double-Sided TEXTURED Print Sheet ................11.1.2.

  • Page 6: Product Information

    The serial number of the Prusa CORE One product is printed on the nameplate located on the printer frame and also on the packaging. The Prusa CORE One is a device intended for use only in indoor environments, where it is protected from external influences.
  • Page 7 Prusa CORE One Warranty Information Prusa CORE One Assembled 3D printers are covered by a 24-month warranty for end customers in the EU, and a 12-month warranty for business customers and end customers in the rest of the world. Consumables and parts subject to wear and tear are excluded from this warranty.
  • Page 8 Since we cannot control the conditions in which you assemble the Prusa CORE One printer, we do not accept responsibility for any losses, injuries, damages, or expenses arising from or associated with the assembly, handling, storage, use, or disposal of the product. Information in this manual is provided without any express or implied warranty.
  • Page 9 Mechanical Risk Moving mechanical parts of the printer can cause injury. Never interfere with the internal components of the printer when it is connected to power or in operation—risk of injury from mechanical parts or electric shock. Prevent unauthorized persons, including children, from handling the printer, even when it is not printing. Burn Risk Do not touch heated parts of the printer –...

  • Page 10: Introduction

    Blog at blog.prusa3d.com! The Prusa CORE One is our first fully enclosed CoreXY 3D printer. Despite its compact size, it offers a large print volume and features exceptional strength and robustness, thanks to its smart exoskeleton frame design.

  • Page 11: Unpacking And Package Contents

    If you purchased an assembled printer, remove it from the box using the handles on the paper packaging, and place the printer on a suitable surface. When moving the Prusa CORE One printer, use the handles on each side. Never lift it by any cables, filament holder, or doors.

  • Page 12: Contents Of The Package And Accessories

    2.1. Contents of the Package and Accessories Your Prusa CORE One printer package includes: Documentation Display (requires manual installation) USB drive with sample prints (G-codes) CORE One Toolset Alcohol-saturated wipe (for initial calibration), acupuncture needle Double-sided Smooth PEI Print Sheet...

  • Page 13: Mounting The Display

    3.1. Mounting the display The printer is shipped with the display unmounted to reduce the risk of damage during transport. To mount the display, follow the image guide below. 1. Open the door and remove the front bezel from the printer by lifting the right side - it's held firmly in place by several magnets.

  • Page 14: Connecting The Lcd - Schematics

    3.2. Connecting the LCD - Schematics For a better overview of the correct connection of both cables, see the illustrations below.

  • Page 15: Reversing The Door Orientation

    3.3. Reversing the Door Orientation If needed, you can reverse the door orientation by swapping the positions of the hinges and magnets, allowing the door to open in the opposite direction. A full guide on how to do so is available at prusa.io/core-one-door-reversal.

  • Page 16: Prusa Core One Overview And Glossary

    Door Handle - used to open the door Spoolholder and Filament Spool - the Prusa CORE One is compatible with 1.75mm filaments Print sheet - easy to maintain; held in place with strong magnets embedded in the heatbed...
  • Page 17 Filament Insertion Point – As you insert the filament into the PTFE tube on the side of the printer (next to the spoolholder), this is the point where it feeds into the Nextruder. Idler lock (swivel) - flip upwards to unlock the idler door Idler - maintains pressure on the filament strand which is moved further into the extruder by the extruder gear Planetary gearbox and extruder motor...

  • Page 18: Your First Print

    Remove the print Door Sensor Information The Prusa CORE One is equipped with a door safety sensor that immediately stops the printer when the door is opened to prevent user injury. Keep the door closed while the printer is in operation.

  • Page 19: Preparing Flexible Print Sheets

    Then rotate it by 90° and repeat until the print separates from the sheet. Then, place the sheet back on the printer. The Prusa CORE One comes with a double-sided smooth PEI print sheet. Learn about all print sheet types in the Regular Maintenance chapter.

  • Page 20: Selftest (Calibration Wizard)

    The print sheet must be installed onto the heatbed before the calibration! When you first power on the Prusa CORE One, the Selftest (Calibration Wizard) will start. The wizard will guide you through the initial calibration and all necessary tests to start printing, providing text descriptions and illustrations.

  • Page 21: Running The Selftest

    5.4. Running the Selftest During the Printer Selftest, do not manipulate or touch the printer unless the calibration asks you to. If the printer is placed on an unstable surface or if there is another running 3D printer next to it, it may affect the accuracy of the calibration. The Selftest is a set of various tests that serve as a diagnostic tool.

  • Page 22: Inserting (Loading) Filament

    5.5. Inserting (Loading) filament Prepare a spool of filament (PLA is recommended), place it on the spoolholder on the side of the printer, and unhook the filament end carefully to avoid tangling. Cut the filament to a sharp point and push it through the PTFE tube all the way to the Nextruder.

  • Page 23: Unloading (Removing) Filament

    5.6. Unloading (Removing) Filament Select LCD Menu - Filament - Unload Filament The printer will preheat automatically. As soon as it reaches the right temperature, the filament will be unloaded from the extruder in a few seconds. Once the extruder stops unloading the filament, remove it by hand from the PTFE tube. The filament needs to be wound up on the spool and secured carefully so that it does not tangle Tangled filament? Let's fix it! If you accidentally let go of the filament end and it retracts onto the spool, it may tangle, posing...

  • Page 24: Starting The First Print

    When printing with materials such as PLA or PETG, slide open the ventilation grille on the top of the printer. The CORE One will then maintain internal airflow and the correct temperature in the chamber using fans, allowing you to print with these materials with the door closed.
  • Page 25 The nozzle will heat to the desired temperature, and the printing of the first object will start. Carefully observe the quality of the first layer. The Prusa CORE One is equipped with very accurate LoadCell technology, which measures the distance between the nozzle and the bed with perfect accuracy.

  • Page 26: Removing A Printed Object From The Print Sheet

    5.8. Removing a Printed Object from the Print Sheet Once the print job is finished, wait until the print sheet cools down. The print plate and heated bed may exceed 100 °C, depending on the settings - contact with unprotected skin can cause burns, so check the heatbed temperature in the footer of the LCD screen! Depending on the type of material, it may happen that the print will separate from the print sheet automatically by itself after cooling.

  • Page 27: Additional Advice And Tips

    By the time the nozzle moves to higher layers, the chamber will already be properly heated. 6.2. LED Light The CORE One features an internal LED light located on the inner side of the XY carriage frame. The LED intensity can be adjusted in the printer settings menu.

  • Page 28: Updating The Firmware

    6.3. Updating the Firmware The Prusa CORE One is ready to print once assembled and powered on. To make sure you have the most up-to-date version of the firmware with the latest features and settings, we recommend checking prusa3d.com/drivers. You can perform the firmware update after you complete the initial Selftest.

  • Page 29: Sample Models

    6.4. Sample Models The USB drive that came with your Prusa CORE One 3D printer contains a number of sample files (G-codes). We recommend keeping them on the flash drive. These files have been prepared (sliced) and thoroughly tested by us. If you encounter issues with print quality at any time, try loading and printing one of the sample files - especially the Prusa Logo Keychain.

  • Page 30: Advanced User Guide

    7. Advanced User Guide This part of the handbook covers everything you need to know once you manage to successfully print your first sample object. Network connection, printing your own models, slicing - all this (and more) is covered on the following pages. 7.1.

  • Page 31: Network Connection

    7.2. Network Connection Prusa CORE One has an onboard Ethernet (RJ45) interface and a detachable Wi-Fi module for connecting to the network. 7.2.1. Wi-Fi Connection To connect your printer to the wireless network, choose one of four options: Entering credentials using the touchscreen: You can manually enter the Wi-Fi SSID and password via the touchscreen.

  • Page 32: Prusa Account

    Prusa Account, you can access the mobile app using the same credentials as for Prusa Connect. 7.2.3. PrusaLink & Prusa Connect You can use two options to access your Prusa CORE One over the network: PrusaLink: A lightweight web interface with limited functionality, accessible within your local network via the printer's IP address.

  • Page 33: Cancel Object

    Mode option in Settings -> Stealth Mode. 7.5. Multi-Material Upgrade 3 The CORE One is fully compatible with the latest generation of our Multi-Material Upgrade 3 add-on, or MMU3 for short. The MMU3 vastly expands your 3D printing possibilities by giving you the option to print with up to 5 colors at the same time.

  • Page 34: Using Nozzles With Various Diameters

    7.7. Using Nozzles with Various Diameters The Prusa CORE One comes equipped with a CHT 0.4mm nozzle by default. This nozzle offers a good quality-speed ratio. However, for some projects, a nozzle of a different diameter might be more suitable.

  • Page 35: Flashing An Unofficial (Unsigned) Firmware

    Breaking the seal is recommended only for very experienced users. Breaking the seal on the mainboard of the Prusa CORE One is IRREVERSIBLE. While this will not void the warranty on electronic parts of the printer, if you break the seal, we disclaim any...

  • Page 36: Printing Your Own Models

    8. Printing Your Own Models Your Prusa CORE One should be now fully calibrated and the first print was a success. And now, you want to print your own model. 3D models can't be printed directly—they need to be prepared using a process called "slicing".

  • Page 37: What Is A G-Code File

    8.2. What is a G-code File? 3D models you have created or downloaded from the internet need to be converted from their original format (.stl, .obj, .3mf, etc.) into a file containing specific instructions for the printer - the G-code. This is the format that 3D printers can understand. This file contains instructions about the movement of the nozzle, temperature settings and more.
  • Page 38 2. Import the 3D model into PrusaSlicer - if you don't have it yet, download it from www.prusaslicer.com. You can either drag and drop it into the PrusaSlicer window, click the Add button on the top menu bar, or use the File - Import menu. If the pop-up window appears, select the Import 3D models only option.
  • Page 39 6. Now, let's adjust the style of supports to a more suitable type: Navigate to the Print Settings menu in the top bar, select Support Material from the left menu, and change the Style option to Organic. 7. Click the Slice now button. Once sliced, you can inspect the Nefertiti model with its generated supports, and view each layer using the slider next to the model preview.

  • Page 40: Prusaslicer

    (not only) your Prusa CORE One. Thanks to the strong community and a dedicated team of developers in Prusa Research, PrusaSlicer is constantly evolving with new features and improvements based on community feedback.

  • Page 41: Prusaslicer Interface Explained

    9.1. PrusaSlicer Interface Explained Opens detailed Print, Filament and Printer settings The Add button is used to import a 3D model into the scene The Delete and Delete All buttons remove the model(s) from PrusaSlicer Switching between Simple, Advanced and Expert modes Logged-in Prusa Account - you can send sliced models directly to the printer.

  • Page 42: Initial Setup And General Workflow

    9.1.1. Initial Setup and General Workflow Upon launching PrusaSlicer, select Prusa CORE One from the Printer drop-down menu on the right (No. 6 in the PrusaSlicer overview on the previous page). If you don't see the Prusa CORE One in the list, you need to add it either by using Add Printer-Add Presets menu item (in the same menu), or by using Configuration - Configuration Wizard from the top menu bar.

  • Page 43: Using Supports

    9.1.2. Using Supports Supports are printed structures resembling scaffolding. They are used for printing complex objects. After printing, they can be easily separated from the output. You can find a large number of objects that can be printed without supports - just place them in the right orientation on the bed, slice them and you can print.

  • Page 44: Speed Vs Print Quality

    The default support pattern usually works correctly, but if you need to modify the places where the supports will be generated, just go to the Print Settings tab and select Support Material. Check the Generate Support Material box. The Overhang Threshold allows you to set the minimum angle for printing the support material.

  • Page 45: Infill

    9.1.4. Infill Another parameter that affects the properties of the printed object is Infill. It affects the printing speed, strength and appearance of the object. Objects printed with the FFF/FDM method usually do not have 100% density. Instead, they contain a certain geometric structure inside. It can take various forms, from simple square grids or hexagons to more complex patterns.

  • Page 46: Printing Objects Larger Than The Print Volume

    9.1.6. Printing Objects Larger than the Print Volume The Prusa CORE One printer has a print volume of 250 × 210 × 220 mm. If this is not enough for your project, you can use PrusaSlicer's built-in tools to find a solution.

  • Page 47: Printing Multicolored Objects (Without Mmu3)

    9.1.7. Printing Multicolored Objects (without MMU3) If you want to have a print with layers in different colors, it can be easily set up directly in PrusaSlicer - follow the instructions below. Switch to the layer view (Preview) using the button in the left bottom corner. Use the slider on the right to select the layer in which you want to change the color.

  • Page 48: Slicing And Exporting

    9.1.8. Slicing and Exporting One of the most important phases of the slicing process is the final check of the sliced object in the Preview. Using the slider on the right, you can review all the print layers of the object one by one.

  • Page 49: Material Guide

    The Prusa CORE One 3D printer is compatible with almost all filaments available. Individual materials may differ not only in color but also in mechanical and optical properties, or even in printing difficulty.

  • Page 50: Regular Maintenance

    11. Regular Maintenance The Prusa CORE One was designed from the beginning as a true print "workhorse". Despite its high reliability, it is still a device with mechanical components that require more or less regular maintenance. Follow the instructions below to keep your printer in perfect condition for as long as possible.
  • Page 51 Consumable materials such as print sheets are not covered by our warranty unless they arrive damaged or incorrectly manufactured. Print sheets are consumables and the warranty only applies to defects that appear immediately after unpacking. All original print sheets made in Prusa Research are double-sided.

  • Page 52: Double-Sided Textured Print Sheet

    11.1.1. Double-Sided TEXTURED Print Sheet Surface resistant to damage and scratches The texture on the surface of the sheet is transferred to the bottom side of the printed object Simpler Z-axis calibration FLEX does not require glue (Kores / PVA gluestick) application to the print bed After the print sheet cools down, the print usually detaches itself PLA prints with a small contact area may require a brim Large PLA prints may warp...

  • Page 53: Double-Sided Satin Print Sheet

    11.1.3. Double-Sided SATIN Print Sheet Suitable for PLA and PETG Soft texture on the bottom part of the print Only use quality isopropyl alcohol (90+ %) to clean FLEX requires the use of a glue separation layer (Kores / PVA glue stick) on the print sheet Wide range of supported materials, including advanced materials such as PC Blend and more Easy maintenance and good adhesion Do not use acetone! Acetone will damage the surface of the print sheet!

  • Page 54: Fans

    Control - Axis) and continue. Warning: Never, under any circumstances, open the gearbox itself unless you have the gearbox alignment tool that comes with the CORE One assembly kit. There is no need to open the gearbox cover. 11.6. Electronics It is a good practice to check and optionally reconnect the electrical connectors on the xBuddy board and electronics board in the Nextruder every 600-800 hours of printing.

  • Page 55: Cleaning The Nozzle

    11.8. Cleaning the Nozzle Do not touch the nozzle during this procedure - it is hot and there is a risk of burning yourself! To better access the extruder during cleaning, raise the extruder to the top of the Z-axis in the LCD menu - Control - Movement - Z Axis.

  • Page 56: Faq - Frequently Asked Questions And Basic Troubleshooting

    12.3. First Print Troubleshooting The calibration and pre-print setup of the Prusa CORE One are fully automated - the filament is automatically inserted, axes checked and the first layer precisely measured. If a printing issue...

  • Page 57: Loadcell Calibration Fails

    12.3.1. LoadCell calibration fails Solution: This usually happens when you tap the nozzle too briefly or with insufficient force. Repeat the calibration and push the nozzle a bit harder. 12.3.2. First layer peeling off from the bed Solution: The most common cause is grease on the bed or an unsuitable combination of material and print surface (e.g.

  • Page 58: The Nozzle Does Not Start Extruding, Even After Multiple Attempts

    12.3.5. The nozzle does not start extruding, even after multiple attempts Solution: Make sure that the filament can reach the extruder gear inside the Nextruder and that the nozzle is not clogged. First of all, load the filament exactly as described in the Loading the Filament chapter. Once the loading procedure is completed, unlock the idler door on the extruder by lifting the small clamp, then flip the door open and see if the filament strand reached the large extruder gear.

  • Page 59: Mesh Bed Leveling Fails

    12.4. Mesh Bed Leveling Fails In case the automatic first layer calibration (Mesh Bed Leveling) fails, the cause is likely to be either the Load cell sensor or a misaligned X/Z axis. Run the Auto Home and Z-axis calibration from the Control menu and see if the issue goes away. Make sure the print sheet is correctly placed and re-run the Load cell calibration again.

  • Page 60: Homing Failed

    USB drive formatted with the FAT32 system. Insert the drive into the printer, press the restart button and once the Prusa CORE One logo appears on the screen, press and hold the knob. This will activate the firmware update screen. Select “Flash” to reinstall the current firmware with the version from the USB drive.

  • Page 61: Advanced Hardware Troubleshooting

    Due to the length of the articles, it is not possible to include detailed troubleshooting guides in this handbook. However, the Prusa CORE One will display an error screen with a short recommendation on how to proceed further if it runs into a problem. This screen will also contain a link to a detailed article in our Knowledge Base at help.prusa3d.com.
  • Page 62 PRINT AND SHARE! JOIN OUR COMMUNITY! Download 3D models for free printables.com and participate in design contests! Follow us for tips, guides, inspiring videos and amazing 3D prints!

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