# What causes this vertical line?

**URL:** <https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484>\
**Category:** Need Help\
**Created:** [January 30, 2023, 6:21pm UTC](https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484 "2023-01-30T18:21:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ThR4z0r](https://avatars.discourse-cdn.com/v4/letter/t/ed655f/32.png) [@ThR4z0r](https://forum.sovol3d.com/u/ThR4z0r)\
**Post date:** [January 30, 2023, 6:21pm UTC](https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484/1 "2023-01-30T18:21:54Z")

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![Imagen de WhatsApp 2023-01-30 a las 13.18.39](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/1X/56fb90a75fa1f9b79cf75081d441fe80ddb9eef1.jpeg)  
Exactly as the title states, it’s a tube that intakes air, so no holes nor gaps are acceptable, I’ve printed the same model 3 times, and it makes the same line, but any other prints come out fine

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**Author:** ![Bjoern](https://avatars.discourse-cdn.com/v4/letter/b/46a35a/32.png) [@Bjoern](https://forum.sovol3d.com/u/Bjoern)\
**Post date:** [January 30, 2023, 6:55pm UTC](https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484/2 "2023-01-30T18:55:50Z")

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This seems to a result of the seam position setting in your slicer. Here it is shown how to hide it in Cura: [https://3dprinting.stackexchange.com/questions/20029/how-where-do-i-hide-the-seam](https://3dprinting.stackexchange.com/questions/20029/how-where-do-i-hide-the-seam)

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**Author:** ![Kgluong](https://avatars.discourse-cdn.com/v4/letter/k/6a8cbe/32.png) [@Kgluong](https://forum.sovol3d.com/u/Kgluong)\
**Post date:** [February 1, 2023, 3:04am UTC](https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484/3 "2023-02-01T03:04:07Z")

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That’s called z seam. It can be very hard to hide them in circular models.

> **[Z Seam (Cura): How to Hide It](https://all3dp.com/2/cura-z-seam-tutorial/)**
>
> A Z seam is a visible line of imperfections running down the side of a print. With Cura, Z seams can be no more! Read on to learn how.

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**Author:** ![Timpraetor](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/timpraetor/32/268_2.png) [@Timpraetor](https://forum.sovol3d.com/u/Timpraetor)\
**Post date:** [February 4, 2023, 6:37pm UTC](https://forum.sovol3d.com/t/what-causes-this-vertical-line/1484/4 "2023-02-04T18:37:12Z")

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As others have mentioned, that’s the Z seam - the point where the nozzle changes layers on your print. Other than it being ugly, it’s not an issue with the finished print that I’ve seen - and I print a lot of pipe-type shapes.

EDIT - with my SV06, I’ve seen a huge reduction in the Z seam by setting my Retraction amount to 1mm on PLA and .7mm on PETG and lowering the extruder temperature to between 2C and 5C from the manufacturer’s recommended minimum print settings.

Tim