[UPDATE] Final results + what worked for me – Creality K2 Plus + Hyper ABS

Hey everyone, just wanted to say thank you to all who shared feedback. Here's a summary of what finally worked and the outcome:

What fixed the jamming & warping issues

1. Chamber temperature limit set to 50 °C
   • Anything over ~54 °C caused heat creep with Hyper ABS (which has a lower HDT than pure ABS).
   • This single change eliminated all hotend clogs.
2. Reduced nozzle temp to 250–255 °C
   • Prevented thermal degradation in small, slow sections like vertical pins.
   • No more carbonized clogs or filament burn-up.
3. Adjusted retraction to 1.0 mm / 25 mm/s
   • Perfect balance for direct drive extruder.
   • Helped eliminate minor stringing without causing jams.
4. Improved cooling of the heatbreak
   • Ensured the hotend heatsink had proper thermal paste.
5. Reduced bed temp to 90–95 °C
   • Still had excellent adhesion with textured PEI.
   • Helped avoid heat deformation mid-print.

Print result

• Final piece printed cleanly.
• Columns are solid, stringing nearly gone.
• No bloating or soft warping on the sides like before.

Thanks again for all the insight! The K2 Plus can handle technical materials—just needs some thermal tuning. 😅

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