Bambu ABS Warping Issue

[JonRaymond]

Still looks like there is room for improvement. @Barryg41 encountered something similar I think.

Horrible z lines. What could it be?

Hi I have posted this scenario before. I had z bands after I did a monthly maintenance. The reason I do this monthly is I use ABS only and it can cause problems. So I eventually went back and re did the belt tensioning procedure. I made sure to loosen the four screws on the back but just loosen a little. Then I made patterns with the x gantry in corner to corner movements and then front to back at least 10 times. This helps to let the springs find the right tension for the belts. After I did …