Poor Surface Finish Due to Mechanical Constraint or Buckling

Inspect the extruder tension and path alignment to confirm if the TPU is buckling before entering the hotend. Check for signs of the filament being flattened or deformed by the extruder gears, indicating improper tension settings. Verify that the Recreus 2.2 mm nozzle and hotend assembly are securely seated without any play or gaps in the thermal path.