Help! Weird Inconsistant Lines/Waves Along Sides of Print

[Hoogen]

Hello all,

I just did my first large print and it has some inconsistent lines along the surfaces.

The lines are only on the 2 sides of the print, and it was printed diagonally on the print bed due to the size.

And idea what is causing this issue?

Printer is an Anet A8.

Thanks!

[wirlybird]

I would look at the Z lead screws to see if they are bent or binding somehow. Just my first thought.

[chanman]

Check your X and Y belts, could be loose.

[MrDoggss]

Given the spacing and shape of the lines, I would agree with Wirlybird. It looks like Z wobble to me as well. Lead screws, or maybe a coupler/motor out of alignment with the lead screw nuts.