What causes the radial 'banding' on many high res resin prints

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Newbie01
Posts: 12
Joined: Tue Jan 19, 2016 7:49 pm

What causes the radial 'banding' on many high res resin prints

Postby Newbie01 » Wed Feb 03, 2016 8:33 am

I have noticed with my top down printer and many others that there is a very subtle kind of banding that can be seen on larger high resolution prints. These look like the effect you would get from layering, but are usually on vertical surfaces, especially on round points.

They seem to occur on every high res print I have come across and at the moment it is the only thing preventing my prints from being what I would call layerless, but I don't know how to fix them. I was wondering whether this may be a software thing such as how an STL file is made, I'm not sure.

Can anyone offer some insight. I've included an example below. The banding is a bit hard to see on this one, but you get the idea.

Image

tom-res
Posts: 19
Joined: Sun Feb 09, 2014 9:55 pm

Re: What causes the radial 'banding' on many high res resin prints

Postby tom-res » Wed Feb 03, 2016 11:59 am

Pixels from the projector you're using

Hugues
Posts: 82
Joined: Thu Oct 02, 2014 3:20 pm

Re: What causes the radial 'banding' on many high res resin prints

Postby Hugues » Wed Feb 03, 2016 2:19 pm

have you tried turning on anti-aliasing when slicing ? CW has this option. It helped me to improve surface smoothness.

Newbie01
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Joined: Tue Jan 19, 2016 7:49 pm

Re: What causes the radial 'banding' on many high res resin prints

Postby Newbie01 » Thu Feb 04, 2016 12:05 am

I have been using Gizmetor from Gizmo 3D. I believe it has the option to switch anti-aliasing on or off, but I don't understand why anti alisasing would cause these patterns.

Hughes when you turned it on, did you see it reduce the banding pattern, or just overall smoothness?

Hugues
Posts: 82
Joined: Thu Oct 02, 2014 3:20 pm

Re: What causes the radial 'banding' on many high res resin prints

Postby Hugues » Thu Feb 04, 2016 7:26 am

Newbie01 wrote:..
Hughes when you turned it on, did you see it reduce the banding pattern, or just overall smoothness?


the banding was reduced for me, although i cannot zoom in on your picture so i'm not sure we have the same defect. i had these "irregularities" especially on curved surface.

Worth a try.

Newbie01
Posts: 12
Joined: Tue Jan 19, 2016 7:49 pm

Re: What causes the radial 'banding' on many high res resin prints

Postby Newbie01 » Thu Feb 04, 2016 11:08 am

Yeah it looks as if the object was actually printed on its side, with the round points being the layering. I'll see if I can find a better example. We are getting it on both our continuous and standard dip prints. I can only think it has something to do with the STL files because it seems it's not just our machines that do it.

seasicksinbad
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Re: What causes the radial 'banding' on many high res resin prints

Postby seasicksinbad » Sat Feb 06, 2016 1:59 pm

For me, the solution to reduce this effect is to match the layer thickness with the pixel width.
Time flies like an arrow, fruit flies like a banana.

Aminacoit
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Joined: Sat Dec 20, 2014 6:07 pm

What causes the radial banding on many high res resin prints

Postby Aminacoit » Wed Aug 29, 2018 8:28 pm

What are the advantages of High Voltage servos for a club racer like myself?

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