# Small lines on 3d Carve
**URL:** https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355
**Category:** Original/PRO Series (Buildbotics) (Gen 1)
**Created:** [September 10, 2023, 11:13pm UTC](https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355 "2023-09-10T23:13:33Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@80GibsonWoodworking](https://forum.onefinitycnc.com/u/80GibsonWoodworking)
#### Post date: [September 10, 2023, 11:13pm UTC](https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355/1 "2023-09-10T23:13:33Z")
I have several small lines where it looks like the z isn’t quite what its supposed to be. Nothing I cant sand out just wondering why this is happening? Anyone have any idea? I’m using a skinny Jenny at 8% stepover, 80IPM and 50 plunge (although I think this is overridden when in 3d finishing mode…).
Any help appreciated,
Ray.
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### Author:  [@Oldockman](https://forum.onefinitycnc.com/u/Oldockman)
#### Post date: [September 11, 2023, 11:35pm UTC](https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355/2 "2023-09-11T23:35:19Z")
Just a thought. Many times throughout a carve, you don’t realize it, but your releasing stresses in the wood. What you thought was still perfectly flat/ attached to the spoilboard now has a slight cup upward. If the marks shown weren’t meant to be milled, maybe increase the retract value of the bit, a bit higher. I’m by no means an expert, but have come to realize how much wood can change during milling. I also understand how setting a bare minimum retract value for the bit saves a ton of time on a carve. I play safe to hopefully account for wood movement vs time/results.
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### Author:  [@SurfinGump](https://forum.onefinitycnc.com/u/SurfinGump)
#### Post date: [September 12, 2023, 12:00pm UTC](https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355/3 "2023-09-12T12:00:14Z")
Just throwing in my 1.5 cents worth; this does kind of look more like a material and/or splintering issue. Other possibilities may be:
- Reducing the step over to 5 or 6 percent
- Adjust feed rate up or down
- Use a different bit, including a sharper one or maybe a ball nose
- Reduce depth-per-cut
- Change cut direction from climb to conventional
- Test on different type of wood
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### Author:  [@Hermsen.BJ](https://forum.onefinitycnc.com/u/Hermsen.BJ)
#### Post date: [September 12, 2023, 2:18pm UTC](https://forum.onefinitycnc.com/t/small-lines-on-3d-carve/22355/4 "2023-09-12T14:18:35Z")
I found myself setting my hand on my wasteboard while checking on carves to cause this