Lines in Calibration Cube

Hi all,

I printed some test cubes, to calibrate my printer (Ender 3V2). But I keep seeing lines. Especially one through the middle of the ‘X’, at the same place every time. As you can see on the picture.

PXL_20241009_151445978_MP.thumb.jpg.2c6e79996a0bbc380dd63aa1a1131111.jpg

I thought it was Z-binding. So I watched some tutorials, and followed the advices. But the problem still remains…20 test cubes later.

This is what I tried:

  • Made the X-asis level
  • Check if the frame is square
  • updating firmware
  • loosening the little screws through the nut, on both sides of the Z-axis
  • Cleaning the Z-axis
  • Replacing the nozzle
  • Calibrate E-steps
  • Installing a filament guide
  • Adjust the extruder tension. But it got so tight, the filament got shaved
  • PID-tune for hotend and bad
  • adjusting eccentric nuts of the x-axis
  • checking if the wheels could rotate freely
  • placing the coupler (between z-axis and stepper motor) a bit higher
  • replacing the motor mounts of the z-axis stepper motor
  • placing an oldham coupler

Does anyone know what the problem is? Or what I missed?

Thanks in advance!