3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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I recently replaced my aging but well dialled in FLSun Q5 with an Elegoo CC2.
I am very pleased at being able to print much larger things, but I get this effect at height. This is an egregious example but even cleaner prints still have obvious layer shifts.
I had a problem at an exact height every time and it was a tiny bit of dirt on the z screw. I couldn't see it because it was a white wisp of filament in the threads but after a cleaning and lube the problem went away.