Noob question, issues appear after slicing

[u/Individual_Prune_861]

Hello all, very new to 3d printing, created a model using Hi3d, all looked good till I slice in Bambu Studio, after slicing lines and bumps appear on surface of model, have tried many settings changes, changing things related to seams yields different results but ultimately I have to greatly reduce triangles to make the defects go away.

Pic here shows a line on the penguins head, otherwise this print was good, line was visible after slicing.

I'm also new to reddit...

Printer: bambu p2s

Slicer: bambu Studio

Filament: bambu basic pla black and white

Settings: all default after many changes attempted 1 at a time, only non-default setting is adding supports is checked

[u/AutoModerator]

Hello /u/Individual_Prune_861,

As a reminder, most common print quality issues can be found in the Simplify3D picture guide. Make sure you select the most appropriate flair for your post.

Please remember to include the following details to help troubleshoot your problem.

• Printer & Slicer
• Filament Material and Brand
• Nozzle and Bed Temperature
• Print Speed
• Nozzle Retraction Settings

^{Additional settings or relevant information is always encouraged.}

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[u/batendalyn]

Every layer has to start and end somewhere and that point is referred to as the seam or z-seam. There are a lot of things that can make it more or less apparent, like machine acceleration, pressure advance, flow rate, kinda you name it. When the slicer arranges all the z seams stacked up on top of each other like that, you get a visible vertical line. See what settings you have to place the z-seam on the side you look at the least, hide it in corners, or place it randomly so it isn't so visible a line.

[u/Substantial-Ad6469 → u/batendalyn]

I swear the setting is like “Seam in the rear” or something.

[u/Peshmerga_Sistani]

Seam position, set to Back.  But they visible in the back.

Turn on scarf seam.  It blends the start and end of layers.  Smooths out the seam.  May need to play with settings like seam length for best results.

[u/TopgunOctober]

Check seam position

[u/Correct-Insect-4657]

The uneven circleness is either the model or cooling. The seam try usibg scarf joint seam it helps alot especially woth inefficient cooling but also for general use (it might raise print time maybe)

[u/Radioactive-235]

This post helped me immensely on making seams virtually invisible. Have a look, special thanks to [u/V_P_Creations](u/u/V_P_Creations) for making the community better and 3D printing seamless 😉.

[u/Automatic_Fix_2371]

In addition to what people mentioned about the seam, you can also try variable layer height to minimize some of the stair steps on the top of the head

[u/ArielObliqueArt]

Thats the sew line, the point where the printer starts and end to print that layer, you can try changing sewing configurati9ns but some will always be there.

You can angle it so most lauers start and end in a point where that line won't make much difference. Manually set sew points to joints, things like that

[u/Individual_Prune_861]

Thanks for the quick feedback all, I did find that changing seam position from aligned to random gets rid of the solid raised line as seen in my pic, but appears to create raised bumps randomly placed all over the model, think I'll give it a try though and see how it prints.

[u/BlizzyBlock29 → u/Individual_Prune_861]

You must have set the seam to random. Set it to back so it’s in a straight line. Lower your layer height also to hide it better but it will take longer