Raise3D Pro 2 Nozzle Thermistor Replacement Guide

Raise3D Pro 2 Nozzle Thermistor Replacement Guide

Are you facing issues with the nozzle thermistor on your Raise3D Pro 2 3D printer? Understanding how to replace it effectively is crucial for maintaining optimal printing performance. In this guide, we will walk you through the detailed steps required to replace the nozzle thermistor correctly, ensuring that your printer functions flawlessly.

Let’s dive into the process and equip you with the knowledge you need to tackle this task successfully.

Nozzle Thermistor Replacement for Raise3D Pro2 3D Printer

Replacing the nozzle thermistor on your Raise3D Pro2 3D printer is a straightforward process. Here are the steps you need to follow:

  1. Check the Hot End:

    • First, verify if the hot end is covered with a silicone sleeve. If it is, remove the silicone sleeve from the hot end.
    • Use an 8mm socket wrench to remove the old nozzle from the heating block. Be gentle and avoid exerting force on the throat tube to prevent damage to the components.
  2. Clear the Throat Tube:

    • Insert a cleaning rod completely through the hot end to ensure the tube is entirely clear of any blockages.
  3. Install the New Nozzle:

    • Screw the new nozzle into the heating block, but do not tighten it completely. Leave a visible gap between the nozzle and the heating block.
    • Hold onto the heating block and tighten the throat tube by rotating the heat sink. Rotate it until the nozzle “catches” on the tube (meaning it will begin to spin). It’s normal if the heat sink appears askew; we’ll adjust it in the next step.
    • If the heat sink is loose on the throat tube, secure the fixing screw before tightening the throat tube.
    • Finally, hold the heating block with an Allen key and fully tighten the nozzle using an 8mm socket wrench. Ensure that a gap between the nozzle and the heating block is maintained.
  4. Reattach the Silicone Sleeve:

    • Reattach the silicone sleeve to the hot end.
    • Loosen the fixing screw on the heat sink.
    • Lay the hot end assembly on a flat surface, rotating the heat sink so that the fixing screw faces outward.
    • Move the heat sink down so that it rests on the silicone sleeve and tighten it into place.
    • If you don’t have a silicone sock, adjust the heat sink so that it is flush with the bottom of the large cylinder.

For more detailed instructions, you can refer to the Raise3D Academy guide on nozzle replacement for the Pro2 series

Diagnosing Nozzle Thermistor Issues

Diagnosing nozzle thermistor issues in 3D printers is crucial for maintaining optimal performance. Let’s dive into the details:

  1. Use a Multimeter:

    • A multimeter can measure the resistance of your thermistor. Disconnect the thermistor from the printer, set your multimeter to resistance mode, and check the resistance across its terminals. Compare the reading with the expected value (usually specified by the manufacturer).

      If it deviates significantly, the thermistor may be faulty.

  2. Built-in Diagnostic Tests:

    • Some 3D printers have diagnostic tests that check the functionality of the thermistor. Consult your printer’s manual or interface to see if such a test is available. Follow the instructions to run the diagnostic and interpret the results.
  3. Observe Symptoms:

    • A bad thermistor can cause noticeable symptoms during printing:
      • Thermal Runaway: If the printer requires a higher temperature than the rated temperature to extrude materials, the thermistor might be faulty.
      • Higher Than Usual Print Temperatures: If you notice unusually high print temperatures, it could indicate a thermistor issue.
  4. Replacement and Attachment:

    • Thermistors are fragile, so handle them carefully.
    • Replacing the Thermistor on Your Hot End:
      • Locate the thermistor near the hot end (where the filament melts).
      • Disconnect the old thermistor and attach the new one according to your printer’s specifications.
    • Replacing the Thermistor on Your Print Bed:
      • The print bed thermistor monitors the heated bed temperature.
      • Follow similar steps to replace it if needed.
  5. Best Thermistor Replacements:

    • Consider these options:
      • HICTOP 100K ohm NTC 3950 Thermistors
      • Creality 3D Printer NTC Thermistor Temp Sensor.

Black temperature probe wire with connector.

IMG Source: botland.store

Essential Tools and Steps for Replacing Thermistor on Raise3D Pro 2

When replacing the thermistor on your Raise3D Pro 2, you’ll need a few essential tools. Here they are:

  1. 1.5mm hex wrench
  2. 2.5mm hex wrench
  3. Flat head screwdriver
  4. Flush cutter

Follow these steps to replace the thermistor:

  1. Lower the build plate:

    • In the “Utilities” tab, lower the Z-Axis platform by selecting the down arrow.
    • Lower the plate until you have enough space to comfortably maneuver tools within the area (recommended Z-axis value is 150-250mm).
  2. Unload the filament:

    • Verify that the temperature is set correctly for your filament (e.g., 215°C for Raise3D PLA).
    • Press the “Unload” button to unload the filament.
  3. Cool down the nozzle:

    • Set the nozzle temperature to “0°C” in the “Home” tab for both left and right nozzles.
    • Allow the nozzle to cool down completely.
  4. Remove the cooling fan:

    • Use a 2.5mm hex wrench to remove the two retaining screws of the cooling fan corresponding to the thermocouple you’ll replace.
  5. Remove the thermocouple from the hotend:

    • Loosen the retaining screws inside the heating block.
    • Loosen the screw on the collet to remove the hotend assembly.
    • Remove the thermocouple cable from the extruder connection board using a flat head screwdriver.
    • Use a 2.5mm wrench to remove the two screws on the extruder connecting board.
    • Loosen the two screws holding the wires for the thermocouple being replaced.
    • Remove the wire protection cover and cut the zip ties holding the wires.
    • Pull the thermocouple wire out from the extruder carrier.
  6. Install the new thermocouple:

    • Insert the cables of the thermocouple through the block at the back of the extruder into the terminal.
    • Reinstall the screws using a flat head screwdriver.
    • Ensure no exposed wires are in contact with the printer to prevent injury.
  7. Final step:

    • Bind the wires together with zip ties and re-install the cord cover.

For detailed instructions, you can refer to the official manual

Black temperature probe with a white connector on the end.

IMG Source: media-amazon.com

Steps for Replacing the Thermistor

Replacing the thermistor on your 3D printer is an essential task, especially if you encounter temperature-related issues. Let’s break down the steps for replacing the thermistor:

  1. Turn off the 3D Printer:

    • Begin by powering off your 3D printer to ensure safety during the replacement process.
  2. Remove the Fan Shroud:

    • Locate the fan shroud covering the hot end (where the nozzle is situated).
    • Carefully remove the fan shroud to access the components underneath.
  3. Unscrew the Nozzle:

    • Use the appropriate tools (such as a wrench or pliers) to unscrew the existing nozzle from the hot end.
    • Be gentle to avoid damaging any components.
  4. Install the New Nozzle:

    • Take the new nozzle and screw it into place where the old one was.
    • Ensure it’s securely tightened but not overly tight.
  5. Reattach the Fan Shroud:

    • Put the fan shroud back in its original position and secure it.
    • Double-check all connections and wires to make sure everything is properly reattached.

Remember that thermistors are delicate instruments, so handle them with care. They play a crucial role in maintaining accurate temperatures during printing. If you encounter any issues after replacing the thermistor, consider calibrating your 3D printer to ensure optimal performance

A close up of a 3D printer nozzle.

IMG Source: prusa3d.com

Troubleshooting Inaccurate Temperature Readings

Let’s address the issue of inaccurate temperature readings in your 3D printer after replacing the thermistor. Here are some steps you can take to diagnose and potentially fix the problem:

  1. Check Thermistor Connection:

    • Ensure that the thermistor is securely connected to its designated port on the printer’s control board. Loose connections can lead to inaccurate readings.
  2. Inspect Thermistor for Damage:

    • Examine the thermistor carefully. Look for any signs of physical damage, such as frayed wires or broken components. If damaged, consider replacing the thermistor.
  3. Resistance Measurement:

    • Use a multimeter to check the resistance of the thermistor. The resistance should match the expected value for the specific type of thermistor used in your printer. Refer to your printer’s documentation for the correct resistance range.
  4. Calibration:

    • Calibrate the thermistor if necessary. Incorrect calibration can result in inaccurate temperature readings. Follow your printer’s calibration procedure to ensure accurate measurements.
  5. Symptoms of a Faulty Thermistor:

    • A faulty thermistor can cause various issues, including:
      • Under extrusion: Filament not melting properly due to low temperature.
      • Clogging: Material not flowing smoothly through the nozzle.
      • Layer delamination: Poor adhesion between layers.
      • Warping: Especially with higher-temperature materials like ABS.
      • Heating errors: Printer halting due to incorrect temperature readings.
  6. Best Thermistor Replacement:

    • Consider using reliable thermistors such as:
      • HICTOP 100K ohm NTC 3950 Thermistors
      • Creality 3D Printer NTC Thermistor Temp Sensor.

A graph showing the actual and target temperatures during a 3D print.

IMG Source: redd.it

In conclusion, mastering the art of Raise3D Pro 2 nozzle thermistor replacement is essential for any 3D printing enthusiast. By following the systematic steps outlined in this guide, you can confidently troubleshoot and replace the thermistor, enabling your 3D printer to operate efficiently. Remember to handle the thermistor and related components with care, ensuring a secure and accurate replacement.

With the right tools and knowledge, you can conquer any nozzle thermistor issues that may arise, allowing your Raise3D Pro 2 to continue producing high-quality prints. Keep innovating and exploring the endless possibilities of 3D printing with a well-maintained and finely tuned machine.


    Leave a Reply

    Your email address will not be published. Required fields are marked *