Prusa Research PRUSA PRO HT90 Handbook
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Prusa Research PRUSA PRO HT90 Handbook

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ENG
3D PRINTING
HANDBOOK
FOR THE PRUSA PRO HT90 3D PRINTER

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Peter Kelly
March 6, 2025

Hi, my name is Peter Kelly. I have recently purchased from Prusa (Chec.) One HT 90 and one XL 5 head Enclosed. I **** about to try them both for the first time. My question is "how do I set them both up on ethernet"? I also have two tower machines, one with the current AMD Chip and 192 Gb ram and the latest Nvidia graphics card, the other with a much earlier Nvidia graphics card. I also have two laptops, both to be connected by WiFi, one is a new MSI with latest Nvidia card, the other is an Asus with no graphics card. So, after all that yabber, 'how do I connect the two tower machines to the XL and the HT90? ' then all to WiFi ? I **** connected to starlink and I have a spare (good quality) Asus modem. Thanks in anticipation, Gratefully, Peter kelly

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1 comments:
Mr. Anderson
March 6, 2025

To set up the Prusa Research PRUSA PRO HT90 and XL 5 head Enclosed on Ethernet and connect them to two tower machines and WiFi, follow these steps:

1. Ethernet Connection:
- Connect an Ethernet (RJ45) cable to the printer's Ethernet port.
- Ensure the printer and the two tower machines are on the same local network.
- Configure the printer's network settings as required.

2. Wi-Fi Connection:
- Install the Wi-Fi module (included in the package).
- Choose a connection mode:
- Local network management (connects only within the local network).
- Full remote management (requires PrusaSlicer for internet-based control).
- Follow the LCD menu instructions to connect to a Wi-Fi network.

3. Connecting to Two Tower Machines:
- Ensure both machines can communicate with the printer over Ethernet or Wi-Fi.
- Install PrusaSlicer or other compatible software on the machines for remote management.
- Configure network settings on each machine to recognize the printer.

This setup allows local control via Ethernet and wireless control via Wi-Fi, depending on your chosen mode.

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Summary of Contents for Prusa Research PRUSA PRO HT90

  • Page 1 3D PRINTING HANDBOOK FOR THE PRUSA PRO HT90 3D PRINTER...
  • Page 2 Prusa PRO HT90 Official Handbook v1.00 - June 15th, 2024 Safety Information Before any operation or handling of the Prusa Pro HT90 printer, please thoroughly read this manual. If you have any questions or concerns, contact technical support. Follow the safety instructions provided in this guide.

  • Page 3: About Prusa Pro And Prusa Research

    Prusa Research, founded by Josef Prusa in 2012, is a renowned Czech company specializing in 3D printing technology. The company grew from a small one-man startup project into one of the most important companies in the additive manufacturing industry, garnering a global reputation for its high-quality, reliable, and user-friendly 3D printers.

  • Page 4: Table Of Contents

    Table of contents 1. About Prusa PRO and Prusa Research ....................... 2. Prusa Pro HT90: Product Information ......................3. Prusa Pro HT90: Warranty information ..................... 4. Safety Information ..............................4.1. Electrical safety: ............................4.2. Mechanical risk ............................4.3. Burn Risk ................................
  • Page 5 11.3. PrusaSlicer Interface ..........................11.4. Initial Setup and General Procedures .................... 11.5. Using Supports ............................11.6. Infill ................................11.7. Brim ................................11.8. Printing Objects Larger than the Print Volume ................. 11.9. Slicing and Exporting ..........................12. Material Guide ..............................12.1. PLA ................................

  • Page 7: Prusa Pro Ht90: Product Information

    3. Prusa Pro HT90: Warranty information The Prusa Pro HT90 3D printer is covered by a 24-month warranty for end customers in the EU, a 12-month warranty for end customers in the rest of the world and a 12-month warranty for all business customers.
  • Page 8 Safety Symbols Caution: strong magnetic fields. Do not place objects sensitive to magnetic fields on the marked areas, as they could be irreversibly damaged. Attention: approaching mechanical parts. Take care not to injure your hands if you are in close proximity to equipment with mechanical parts. Information on function, operation and service can be found in this manual or online at help.prusa3d.com.

  • Page 9: Safety Information

    4. Safety Information Please, read the following information thoroughly. Ensure that anyone who operates the Prusa PRO HT90 knows these information. 4.1. Electrical safety: The printer can only be powered through a standard 230 VAC, 50 Hz power outlet. Never use alternative power cords, they may cause problems or even damage the printer.

  • Page 10: Safety Instructions And Disclaimer

    4.4. Safety Instructions and Disclaimer Acting contrary to the information provided in the manual may lead to injury, poor print results, or damage to the 3D printer. Ensure everyone working with the printer is familiar with the manual and understands the instructions. Since we cannot control the conditions under which the 3D printer is used, we do not accept any liability and explicitly disclaim any responsibility for losses, injuries, damages, or expenses arising from or related to the assembly, handling, storage, use, or disposal of the product.

  • Page 11: Prusa Pro Ht90 Package Contents

    5. Prusa Pro HT90 Package Contents IEC 320 C19 Power Cable (plug is automatically selected based on the country of destination) Wi-Fi adapter - manufacturer: TP-Link, type: TL-WN821N USB flash drive A spool of Prusament filament Textured Printpad Alcohol-soaked pad...

  • Page 12: Prusa Pro Ht90: Parts Description

    6. Prusa Pro HT90: Parts Description Surveillance camera (inside the chamber) Sliding door Print head Heated bed with a print sheet Power on/off button Touch control display with USB port (for USB drive with print projects) Status indicator light Door handle with lock - press to unlock...

  • Page 13: Unpacking And Setting Up The Printer

    7. Unpacking and Setting Up the Printer The printer must be placed in a location with sufficient load-bearing capacity (at least 50 kg) and space around it, especially upwards, where the doors slide open. The bottom of the printer has cutouts for transport straps.

  • Page 14: Spoolholder

    8.2. Spoolholder Next, prepare the adjustable spoolholder. It can only be inserted in one correct direction, as shown below - the narrow part goes into the gap first. To adjust the required width for a wider spool, turn the end of the holder. Turning counterclockwise increases the width.

  • Page 15: Network Connection

    After adjusting the width, the spool holder is ready. Place a spool of filament on the holder. If you have the official DryBox accessory, do not place the spool on the spoolholder yet. The DryBox setup is described in the following chapters. 8.3.

  • Page 16: Wireless Connection

    8.3.2. Wireless Connection If you cannot use a cable, you will find a Wi-Fi adapter in the package. Insert it into one of the two USB ports on the back of the printer. Do not insert the Wi-Fi module into the USB port intended for the flash drive with print data on the side of the display! To connect, you need to enter login details in the Settings.

  • Page 17: Power On The Printer

    Please keep in mind that we are not able to control the conditions in which your printer connects to your network. The HT90 is equipped to handle all standard network conditions, however, if your corporate network requires a specific configuration, please contact your IT administrator for specific instructions.

  • Page 18: Your First Print

    9. Your First Print To use the printer correctly, pay attention to the information in the following chapters. 9.1. Basic Operation Emergency Stop If needed, there is an Emergency Stop right above the display that will immediately stop all printer activities. Pressing it will display an information screen (see below).

  • Page 19: Status Led

    Red indicates an error has been detected. 9.3. Sliding Door The Prusa Pro HT90 printer has a sliding door and a safety sensor. Use the green handle to operate it. First, press the handle, then pull the door to the desired height.

  • Page 20: Print Sheets

    9.4. Print Sheets The Prusa Pro HT90 can use two types of print sheets - standard (for printing all materials) and special (for printing filaments based on polyamides, such as PA and Nylon). When you unpack the printer for the first time, the print sheet should be already installed on the heated bed.

  • Page 21: Placing The Print Sheets

    9.4.1. Placing the Print Sheets The print sheet contains a special surface that makes removing printed objects fast and easy. It's important to keep it grease-free (try not to touch the print area with your fingers). Place the print sheet on the bed by first aligning the rear cutout with the locking screws on the back of the heated bed.

  • Page 22: Loading Filament

    9.5. Loading Filament First, prepare a filament spool - we strongly recommend using the ASA filament included in the printer package. Take the spool and ensure the filament end is properly secured. You have two options where to place the filament spool. Either you can use the side spoolholder, or you can use an optional accessory - an external filament dryer.

  • Page 23: Filament Spool Placed On The Side Spoolholder

    9.5.1. Filament Spool Placed on the Side Spoolholder Start by trimming (cutting) the filament end to a sharp point. On the printer's display, select LOAD FILAMENT. Choose the correct type of filament The print head will start heating to the required temperature. Once the required temperature is reached, insert the filament fully into the print head and press CONTINUE.

  • Page 24: Loading Filament From An External Drybox (Official Accessory)

    9.5.2. Loading Filament from an External DryBox (Official Accessory) The second option where to place a filament spool is an external box that serves as a filament dryer. Some materials are hygroscopic, meaning it is necessary to dry them before printing and keep them in an environment with as low humidity as possible during printing.
  • Page 25 Open the dryer by unlocking the two hinges on the top. Place the spool with the filament on the holder in the center and release the filament end. Thread the filament completely through the white PTFE tube and close the dryer by snapping both hinges shut.

  • Page 26: Unloading Filament

    9.6. Unloading Filament On the display, select UNLOAD FILAMENT. The printer will ask if the filament type matches the one it remembers. If yes, the print head will start heating. If not, select the correct material type. The printer will heat the nozzle as needed. The extruder will push out some material and then completely remove it from the nozzle.

  • Page 27: Filament Sensor

    9.7. Filament Sensor The printer is equipped with a filament sensor that detects when the filament on the spool runs out. If this happens and the filament end passes through the sensor, the printer will pause the print and remove the filament from the nozzle. You can then pull it out from the filament insertion point by hand.

  • Page 28: Starting The First Print

    For the first print, we recommend using one of the sample models uploaded in the printer's storage. These objects have been prepared by Prusa Research and they have been fully tested. Please note that each model may require a different material. Never print with an incompatible material - e.g., an object that requires PLA filament must not be printed with PCCF filament.

  • Page 29: Printing From A Usb Flash Drive

    9.8.2. Printing from a USB Flash Drive If the print file is on a USB flash drive, insert it into the USB connector on the side of the display. In the Print menu, select USB and choose the desired print file. The rest of the process is the same as for printing a file from the internal memory.

  • Page 30: Options During Printing

    9.8.3. Options During Printing During the print job, several options are available. You can pause the print (Pause), completely stop it (Cancel), adjust print parameters (Tuning), and modify additional settings (Settings). Pausing the Print If necessary, you can pause the print by pressing the Pause button. The print head will move away from the printed object, and the printer will wait for the next command.
  • Page 31 Tuning During printing, you can adjust several print parameters by pressing the Tuning button. The first parameter is the first layer height. We strongly recommend monitoring the first layer print through the cutout under the handle. The first layer is crucial for a successful print. If the first layer needs adjustment, use the Z- and Z+ buttons.

  • Page 32: Settings (During A Running Print)

    9.8.4. Settings (during a running print) During printing, you can access additional printer settings. Available options include: Turning the light on/off Change filament (during printing) - displays a confirmation screen, the printer then guides you through the filament change Adjust temperature (nozzle, bed, chamber) System - checks for updates.
  • Page 33 If the print does not come off, remove the print sheet and gently bend it on both sides. Then rotate it 90° and repeat the bending. Be careful not to bend the print sheet too much. The last method is to use a spatula. If using a metal spatula, as shown in the picture, use it as parallel to the bed as possible to avoid damaging (scratching) the bed.

  • Page 34: Sample Models

    Prusa Pro HT90 3D printer. If a print fails, but the sample files from Prusa Research print correctly, it likely indicates an issue with how your files are sliced. Try preparing them again with the default PrusaSlicer settings and...

  • Page 35: Advanced Guides

    10. Advanced Guides This part of the manual covers everything you need to know once you successfully print your first sample object. Network connection, printing your own models, slicing - all this and more are described in the following pages. Prusa Academy Courses Become an expert in 3D printing! Prusa Academy offers comprehensive online courses on various 3D printing topics.

  • Page 36: Network Connection

    10.1. Network Connection The Prusa Pro HT90 3D printer has a built-in Ethernet (RJ45) interface and can be expanded with a Wi-Fi module for wireless network connection. The Wi-Fi module is included in the package. There are three modes available:...

  • Page 37: Web Interface (Local)

    10.2. Web Interface (Local) Open a web browser of your choice and enter the printer's IP address into the address field. See the previous chapter on how to obtain the printer's IP address. Once you confirm the address, you will be presented with the web interface with a complete overview of the printer. We recommend using Google Chrome.
  • Page 38 Let's take a detailed look. The first block on the left provides a visualization of the printed file, options to pause (orange button), restart/resume (green button), or stop (red button) the print, file name, and current print speed (Speed), material flow (Flow), used filament (Filament), layer (Layer), estimated time to completion by the printer (Estimate), calculated slicer time (Slicer), total time (Total), and task completion time (ETA).
  • Page 39 The middle section (Temperatures) provides an overview of the nozzle temperature (Extruder), Heatbed, and Heated Chamber. The State column shows the current heater power value, the Current column shows the current temperature and the Target column shows the desired value. At the bottom, there is a temperature graph showing the last 20 minutes.
  • Page 40 In the last section, Webcam, you can access the camera image. Also, two actions for loading (Load) and unloading (Unload) filament are available when a print job is not running. Webcam Tab This tab displays the top-down camera image. If you need an additional view, connect an external webcam via the USB port and restart the printer.
  • Page 41 G-code Files Tab This card manages print files, providing an overview of all folders and files in the printer memory. A total of 11.5 GB of internal memory is available. At the top of this card is a quick search bar. Enter text to automatically search for all matching folders and files.
  • Page 42 After a successful upload, a confirmation will appear. To start printing, click on the file and confirm by clicking Print. For other actions, right-click on the file to display more options. The Print Start option in the context menu sends the file to be printed, Add to Queue adds the file to the print queue, Add Batch to Queue adds the selected files to the print queue, Preheat starts preheating the printer according to the specifications in the file.

  • Page 43: Prusa Connect

    Prusa Account (free account, required). Then click Add Printer, select Prusa Pro HT90 from the list, and enter the code found in the printer menu in Settings - Network - Prusa Connect - Add Printer to Connect.

  • Page 44: Printing Your Models

    11. Printing Your Models Your Prusa Pro HT90 3D printer should now have its first print successfully completed. Now you want to print your own models. Let's go through the necessary steps briefly - everything is explained on the following pages. If you need help with slicing, check out our knowledge base at help.prusa3d.com...

  • Page 45: Prusaslicer

    Research which is based on the open-source project Slic3r. PrusaSlicer is open-source, packed with useful features, and frequently updated, so it includes everything you need to export perfect print files (not only) for Prusa Pro HT90. PrusaSlicer boasts features like: Clear and simple user interface...

  • Page 46: Prusaslicer Interface

    11.3. PrusaSlicer Interface Tabs with detailed print, filament, and printer settings Add button - import a 3D model into the scene. Delete and Delete all buttons - remove model(s) from PrusaSlicer Simple, Advanced, and Expert modes toggle Print quality and speed settings Material selection Printer selection Quick settings for Infill density, Supports, and Brim...

  • Page 47: Initial Setup And General Procedures

    In the main PrusaSlicer window, look for the Printer drop-down menu on the right (no. 7 in the illustration above). Make sure Prusa PRO HT90 is selected. Then select Print Quality from the top drop-down menu (Print Settings - no. 5 in the illustration above).

  • Page 48: Using Supports

    11.5. 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 (or design) objects that can be printed without supports - just place them in the right orientation on the bed, slice them and you can print.

  • Page 49: Infill

    You have three options to choose from when selecting support generation: Support on Build Plate Only - generates supports only in the space between the object and the print bed. For Support Enforcers Only - generates supports only where enforced by placed modifiers. Everywhere - generates supports everywhere.

  • Page 50: Brim

    11.8. Printing Objects Larger than the Print Volume The Prusa Pro HT90 has a print area of Ø 300 mm and maximum Z-height of 400 mm. If this is not enough for your project, you can use PrusaSlicer's built-in tools to find a solution.

  • Page 51: Slicing And Exporting

    11.9. Slicing and Exporting One of the most important phases of the slicing process is the final check of the sliced object in the Preview. Once your object is scaled, rotated, and supported, the infill is set and the correct material is selected in the menu, you can press the Slice button so that PrusaSlicer can process the 3D model.

  • Page 52: Material Guide

    Complete material table available online! Due to the limited space in this guide, we can only provide a brief overview of popular materials. Visit help.prusa3d.com/materials for a detailed overview of a wide range of printing materials. The Prusa Pro HT90 is compatible with almost all available filaments.

  • Page 53: Pla

    12.1. PLA PLA is the most commonly used material for 3D printing. It is easy to print with and prints from PLA are very hard. It is the perfect choice for printing large objects due to its low thermal expansion (prints do not warp on the print bed) and for printing detailed small models. Advantages Easy to print, suitable for beginners Printing small, detailed models...

  • Page 54: Petg

    12.2. PETG PETG is one of the most popular materials for 3D printing. It is a great choice for parts that will be subjected to mechanical stress. Compared to PLA, it has higher thermal resistance, is more flexible and less brittle. Due to its low thermal expansion, it adheres well to the print bed and does not deform.

  • Page 55: Asa (Abs)

    12.3. ASA (ABS) ASA and ABS are very similar materials. ASA is better than ABS in many ways. ASA is UV stable and shrinks less during printing compared to ABS. In terms of post-processing, both materials are similar. We will discuss ASA, but the same applies to ABS. ASA is a strong and versatile material.

  • Page 56: Pc (Polycarbonate) And Pc Blend

    12.4. PC (Polycarbonate) and PC Blend Polycarbonate (PC) is a technical material with excellent toughness, tensile strength, and high- temperature resistance. However, it is very challenging to print, suitable mainly for advanced users. This does not apply to our Prusament PC Blend, which is much easier to print compared to other polycarbonates.

  • Page 57: Pvb

    12.5. PVB Polyvinyl butyral (PVB) is a material that can be easily smoothed using isopropyl alcohol (IPA). When properly set, prints are translucent, making PVB suitable for printing vases, lampshades, and other decorative models. Print settings are similar to PLA, but PVB has slightly better mechanical properties.

  • Page 58: Flexible Materials

    Higher cost Absorbs moisture - must be stored in a dry environment For the Prusa Pro HT90 3D printer, we recommend using Semiflex or Flexfill 98A filaments, Filatech FilaFlex40, or any filament for which we have tuned profiles in PrusaSlicer.

  • Page 59: Pa (Polyamide) / Pa11Cf

    12.7. PA (Polyamide) / PA11CF Polyamide (known as Nylon) is a versatile material known for its durability and is commonly used for 3D printing special models despite high print difficulty (does not apply to PA11CF) and higher costs. There are several types of polyamide that differ in properties such as temperature resistance, water absorption, and adhesion to different types of surfaces.

  • Page 60: Pei (Polyetherimide) / Ultem

    12.8. PEI (Polyetherimide) / ULTEM Ultem, also known as PEI (Polyetherimide), is a high-performance thermoplastic material ideal for 3D printing. Its extreme resistance to heat and chemicals makes it a great choice for demanding applications. With a temperature range from -70°C to over 200°C, Ultem offers high stability and strength in a wide range of environments.

  • Page 61: Pps (Polyphenylene Sulfide)

    12.9. PPS (Polyphenylene sulfide) PPS or Polyphenylene sulfide is a technical thermoplastic material suitable for 3D printing characterized by high resistance to heat and chemicals. With thermal stability from -100°C to over 200°C, PPS is an ideal choice for applications requiring resistance in extreme temperature conditions.

  • Page 62: Ppsu (Polyphenylsulfone)

    12.10. PPSU (Polyphenylsulfone) PPSU, Polyphenylsulfone is a technical thermoplastic material with excellent resistance to heat and chemicals, ideal for applications requiring extreme stability and durability. Its properties include high mechanical strength, toughness, and wear resistance. With a temperature range from -100°C to over 200°C, PPSU is suitable for applications where extreme temperature resistance is needed.

  • Page 63: Pes (Polyethersulfone)

    12.11. PES (Polyethersulfone) PES, short for Polyethersulfone, is a technical thermoplastic material whose excellent combination of properties makes it an ideal choice for a variety of applications, including 3D printing. Its high resistance to heat, chemicals, and mechanical stress guarantees reliability and performance in all conditions.

  • Page 64: Psu (Polysulfone)

    12.12. PSU (Polysulfone) PSU, or Polysulfone, is a technical thermoplastic material with an excellent combination of properties that make it suitable for a variety of applications including 3D printing. Its high resistance to temperature, chemicals, and mechanical stresses ensures reliability and performance in demanding conditions.

  • Page 65: Pekk-Cf (Polyetherketoneketone)

    12.13. PEKK-CF (Polyetherketoneketone) PEKK-CF is an advanced thermoplastic filament that combines excellent mechanical properties with high-temperature resistance and chemical stability. This material is based on polyetherketoneketone (PEKK) with added carbon fibers, improving its strength and toughness. PEKK-CF filament offers excellent resistance to temperature, chemicals, and wear, making it an ideal choice for applications requiring high performance and reliability.

  • Page 66: Peek-Cf (Polyetheretherketone)

    12.14. PEEK-CF (Polyetheretherketone) PEEK-CF is an advanced thermoplastic filament with excellent mechanical properties and high- temperature resistance. This material is based on polyetheretherketone (PEEK) with added carbon fibers, improving its strength, toughness, and thermal resistance. PEEK-CF filament is known for its high resistance to temperature, chemicals, and wear, making it an ideal choice for applications requiring extreme operating conditions.

  • Page 67: Regular Maintenance

    13. Regular Maintenance Prusa Pro HT90 was engineered for maximum efficiency and reliability. However, it is still a mechanical device with components that require regular maintenance. Please see the information below to learn how to keep your HT90 in the optimal shape.

  • Page 68: Changing The Print Head

    13.2. Changing the Print Head The Prusa Pro HT90 printer is available with two print head configurations. By default, the printer comes with a head capable of printing materials up to 300°C (ASA, PETG, PC, PA). For printing industrial materials such as PEI, PEKK, and PEAK, a different type of print head with a temperature limit of 500°C is required (High-Temp Print Head, marked with a red stripe)

  • Page 69: Nozzle Replacement

    13.3. Nozzle Replacement The Prusa PRO HT90 uses quick-swap REV nozzles. To change a nozzle, use the Wizard in the LCD Menu. From the Home screen, select More, then Nozzle change. If the nozzle is too hot at this point, you will be presented with a warning. Select Cooldown and wait until the nozzle's temperature reaches safe levels.
  • Page 70 Once the nozzle is out, select Continue on the screen. You will be presented with a menu where you can select which type of nozzle you wish to install. The standard type is the HF (High Flow) nozzle. The ObXidian is ideal for composite materials (e.g., containing carbon fiber) and the HT-A is designed for high-temperature abrasive materials, such as PEI CF, PEKK CF, and similar.

  • Page 71: Filter Replacement

    13.4. Filter Replacement The top part of the printer's chamber contains a housing with a HEPA filter. This filter needs to be replaced or cleaned regularly. First, allow the printer to cool down to room temperature to avoid the risk of burns from hot surfaces.

  • Page 72: Advanced Hardware Troubleshooting

    Due to the length of the articles, it is not possible to include detailed troubleshooting guides in this handbook. If the Prusa Pro HT90 encounters a problem, an error screen with a brief recommendation on how to proceed will be displayed. Detailed guides for troubleshooting component replacements and advanced hardware issues can be found online at help.prusa3d.com, or you can contact our technical support.

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