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I have recently purchased an Anycubic Kobra, and the first two prints worked out fine. On the third print, the Y-axis belt snapped, so I contacted Anycubic support and they gave me a replacement one. I did a few test owl prints, but there was major Y-axis shifting on the prints.

Images of two failed owl prints

After I replaced the belt, I made sure that they were as tight as possible, but there was some slack, but I couldn't tighten them further. There is only shifting in the Y-axis, but it mostly only shifts in one direction (towards front).

What other reasons would cause a Y-axis shift like this? Is this due to incorrect belt replacement, as there was no shifting prior to the belt snap?

Greenonline
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Lithanium
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1 Answers1

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I found a solution to this layer shifting. Even though the belt was too loose, I managed to use a rubber band to tighten the belt slightly. Now to prints go off without a hitch. Thanks for your help.

Lithanium
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    Glad you solved the problem! But, a rubber band sounds like a temporary fix, you might want to look into a [belt tensioner](https://a.aliexpress.com/_Ev0fQ57). – 0scar Jan 20 '23 at 08:24
  • The printer came with a belt tensioner, however even with the knob at the tightest, there is still a lot of slack and the belt skips steps. When printing PLA, the bed (60) won't melt the rubber band, right? hanks for your suggestion. – Lithanium Jan 22 '23 at 02:14
  • Did you crimp on one of the brass end clamps yourself or was the belt completely assembled. I think the belt is just a tad too long. Rubber bands have a short (or at least a way shorter) life expectancy than the belt. – 0scar Jan 22 '23 at 07:36
  • All the belt tensioners were already pre-assembled. Maybe Anycubic Support accidentally sent me a slightly longer belt, as if was fine before the belt snapped. – Lithanium Jan 23 '23 at 04:10
  • Okay, clear! If I were you I'd shorten the belt using a new brass clamp or repurpose the existing one. But, what works for you you should use! Happy printing! – 0scar Jan 23 '23 at 14:05