Print/waves marks

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SrForum
Posts:2
Joined:Sat Nov 06, 2021 4:55 pm
Print/waves marks

Postby SrForum » Sat Nov 06, 2021 5:05 pm

Hello everybody.
My prints are showing these lines/waves on the surface, which are often difficult to remove in the casting. Is there any way to reduce these marks and make the resin piece smoother on the surface?
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2021-03-20 14.21.49.jpg
2021-03-20 14.21.43.jpg
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rkundla
Solus Master
Posts:309
Joined:Sat Jan 09, 2016 6:01 am

Re: Print/waves marks

Postby rkundla » Sat Nov 06, 2021 8:47 pm

The standard questions:

- What machine are you using?
- What resin are you using?
- What settings are you using on the machine for that resin?
- Are you printing for casting or modeling?

Have you tried changing the orientation of the print to minimize the layer lines? Orientation plays a big part in how the layer lines appear on the print. Curves that are in alignment with the Z-plane will show the most layer lines. You can also use a smaller layer thickness at the expense of a longer-running print job.

-Ron
SrForum
Posts:2
Joined:Sat Nov 06, 2021 4:55 pm

Re: Print/waves marks

Postby SrForum » Mon Nov 08, 2021 12:42 pm

Hello, rkundla.
I'm using a Solus and also another DLP DIY. The resin is B9 Emerald for casting and a modeling resin (the red one in the photo). The problem with the lines happens with both printers and with any resin. 0.30 layer, but the orientation did not understand. I am printing these pieces vertically.
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rkundla
Solus Master
Posts:309
Joined:Sat Jan 09, 2016 6:01 am

Re: Print/waves marks

Postby rkundla » Sun Nov 14, 2021 6:02 am

For simple prints, you can cure them per the resin directions, then use fine sandpaper to smooth out the layer lines.

Other options:
  • using a smaller Z-layer step size < 0.30 per your response
  • try to tilt the object to change Z-layer profile as it prints to see if you can minimize the layer lines
  • try different brands of resin that blend the layers better (resin with lower sharpness)
  • If anti-aliasing is available, sometimes that can help smooth layer lines
  • slightly defocus the projector to soften the hard edges (might have other negative effects)

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