Upgrading an Anycubic Kobra for 290°C Nozzle Temperature:

Key Considerations:

• Stock Limitations: The Anycubic Kobra's stock hotend and electronics might have limitations for consistent 290°C operation.
• Material Compatibility: 290°C opens up high-temperature materials like PEEK, PEI, and some specialty nylons. Ensure your desired materials can be consistently printed at this temperature.
• Safety: High temperatures increase the risk of burns and fires.
  ¹ Proper ventilation and safety precautions are crucial.  
  1. Managing Explosion and Fire Hazards in 3D Printing Applications | Casting Source

  

  www.castingsource.com

Potential Upgrade Paths:

1. Hotend Upgrade (Most Significant):

   • All-Metal Hotend:
     • Benefits: Better heat transfer, improved temperature stability, and often higher temperature limits.
     • Options: E3D V6, Micro Swiss, Bondtech, etc.  ($50 $16 min includes thermistor and heater core 24v)
       
     • Considerations: Requires careful assembly and potential modifications to the printer's mounting system.

2. Heater Cartridge Upgrade:

   • Higher Wattage: A more powerful heater cartridge can help reach and maintain 290°C.
   • Compatibility: Ensure the new cartridge fits within the existing hotend design and has the correct voltage and resistance.

3. Thermistor Upgrade:

   • High-Temperature Thermistor: A thermistor rated for higher temperatures is essential for accurate temperature readings.
   • Compatibility: Choose a thermistor with the correct resistance and connector type.

4. Electronics Check:

   • Power Supply: Ensure your power supply can handle the increased power demands of a higher temperature setup.
   • Mainboard: Verify that the mainboard's MOSFETs and other components are rated for the higher currents involved.

5. Cooling:

   • Part Cooling Fan: A more powerful part cooling fan can help dissipate heat from the print and reduce warping.

Important Notes:

• Firmware Updates: You may need to adjust firmware settings (PID tuning, temperature limits) for optimal performance with the upgraded components.
• Testing: Thoroughly test the printer after upgrades to ensure proper functionality and prevent safety hazards.
• Consider a Budget: Upgrading to 290°C can involve significant costs, depending on the chosen components.

Disclaimer:

• This information is for general guidance only.
• Modify your 3D printer at your own risk.
• Always consult the manufacturer's documentation and seek assistance from experienced users when making modifications.

Recommendation:

• Start with thorough research: Explore online forums, communities, and documentation for specific recommendations and potential pitfalls related to upgrading your Anycubic Kobra.
• Consider a simpler approach first: If you primarily want to print occasional high-temperature materials, you might be able to achieve acceptable results with minor upgrades or by adjusting print settings.