Creality 7 is deleting parts of my stl when I try to slice

Software Creality Print V5 and Beyond
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See below. Happens in three different builds of C7 that I have tried. Still using C6 unless/until I can find a way to fix C7 so this does not happen.

Creality 6.0.3.1591

C6
C6370Ă—360 22.7 KB

Creality 7.1.0.4414

c7
c7377Ă—364 27.4 KB

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Hey Ljones

When Creality transitioned from the older V6 architecture over to the modern V7 branch (which is heavily based on the modern OrcaSlicer/PrusaSlicer open-source engines), they completely changed how the slicer handles narrow lines, thin walls, and fine text. What you are seeing isn’t actually “deleting” the mesh—the slicing engine is deciding that those fine script lines and delicate flower petals are “too thin” for your current nozzle and line width settings to physically print, so it drops them entirely.

Here are the most common culprits in Creality Print 7 and how to fix them to get your details back:

1. Toggle the Perimeter Generator to Arachne

Creality 7 uses a variable-line-width engine called Arachne by default, but its minimum feature size thresholds can be aggressive right out of the box. If it’s set to Classic, it will ignore anything thinner than your nozzle width.

  • The Fix: Go to your Quality or Strength settings and look for Perimeter Generator.

  • If it is currently on Classic, change it to Arachne.

  • If it is already on Arachne, look directly below it for a setting called Minimum feature size (or Minimum wall thickness) and drop that value down (try 0.1 mm or 15%). This forces the slicer to try and squeeze a thinner bead of plastic into those tight script letters instead of giving up.

2. Enable “Detect Thin Walls”

If your profile is still using the Classic perimeter generator, it will blindly ignore any part of the STL that falls below your default line width (usually 0.42 mm or 0.45 mm).

  • The Fix: Search your settings for Detect Thin Walls and make sure it is checked On. This tells the engine to dynamically drop its extrusion width to capture those single-pass details.

3. Check for Non-Manifold Mesh Errors (The Invisible Culprit)

The newer geometry engine in Creality 7 is far less forgiving of model errors than V6 was. If the STL has “open edges” or tiny microscopic gaps where the text meets the base disk, V7 will often fail to process those specific shells during slicing.

  • The Fix: Right-click your model on the build plate in Creality 7. If you see an option for Fix Model or a small warning icon in the bottom right corner of the screen, click it to let Windows or the internal algorithm repair the mesh topology before you hit slice.

4. Slice Gap Closing Radius

Sometimes the slicer sees the tiny gap between the script letters and the background as something to be ignored.

  • The Fix: Look for Slice gap closing radius in the Advanced/Quality settings. If it is set too high, it will merge or delete fine details. Try lowering it to 0.01 mm.

If you toggle Arachne on and lower the Minimum Feature Size and the text still doesn’t appear in the preview, it means the script font on that STL is simply physically smaller than what a 0.4 mm nozzle can resolve. You may need to scale the model up slightly on the Z/XY plane, or temporarily lower your Line Width setting in the slicer to 0.35 mm to trick the preview into rendering it.

let me know how you make out

Mac486

3 Likes
3

… enlarge the text to make it thicker so it can be printed easily… else change nozzle from 0.4 to 0.2 so you can print very thin lines…

1 Like
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Mac,

Changed to Arachne and 15% wall width, changed the slice gap from .45 to .2, the file is looking good in the slicer now. Will get a chance to run a test print over the weekend. Thanks!

BTW, may I ask where is the source for your information? I do hate to take up forum space for something readily available on the net. As you may know the online documentation for Creality V6 and V7 leaves something to be desired….

LJ

1 Like
5

Thank you!

6

I use a couple of sorces and my own knoweldge. The sources are just genral online (google, creality, reddit, ect). And don’t worry at all about taking up forum space! That’s exactly what this community is here for, and since Creality’s documentation can be a bit sparse, threads like this end up helping the next person who runs into the exact same issue.

Keep me posted on how the print goes!

1 Like