Oval Circles, distorted part, but only sometimes

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@Hurla

Some of my prints are coming out distorted. But here’s the confusing part: If I go back to the printer and just reprint the file from history, it comes out perfect. This has, so far, worked every single time.

Did you look through this (long) post? It’s a multi-month discussion of distortion of circles.

Why Ovals and not circles

I am trying to print, some Voron 2.4 parts on the X1 Carbon. these contain holes in the vertical and horizontal axis. When printing the vertical holes are fine. But the horizontal holes keep printing an oval, instead of the circular ones that are needed. I have loosened the x y belts, by undoing the four screws on the back of the printer. Then moving the toolhead all the way to the front and back of the printer as suggested in Bambu’s wiki. But this is not having any affect. Still getting the o…

That said I’m a little puzzled by the “works on a reprint” part.