Pathfinder Crop "artifact"

[LambdaEnt]

I have several rectangular shaped bands that I want cropped by a perfect circle. Yet it is not cropping exactly.

Easier to explain by the screen shots:

1. White circle, behind blue gradient circle with, white band on top

2. White bands with a circle of exact same size and position on top

3. After Pathfinder Crop

4. Unhide #1

5. "Artifact" up close

[LambdaEnt]

Screen shots didn't line up very well lets try again:

1. White circle, behind blue gradient circle with, white band on top

2. White bands with a circle of exact same size and position on top

3. After Pathfinder Crop

4. Unhide #1

5. "Artifact" up close

 

[Ton Frederiks]

I think it is caused by anti-aliasing. 

If you turn Anti-aliased  Artwork off in the Preferences and view it using CPU Preview it will probably go away.

[LambdaEnt]

No, it's not just the display. It shows up in exported JPG or PNG. But thanks for replying.

[Ton Frederiks]

And if you check Art Optimized (instead of the default Type Optimized) for anti-aliasing during export, is it still visible?

[LambdaEnt]

There shouldn't be any blue underneath. I don't think it's the problem. 

[LambdaEnt]

But I will check in the morning. 

[Jacob Bugge]

Ent,

Probably far too far out, but what happens if you change the (Pathfinder Options) Precision to a very low value?

[LambdaEnt]

I set it to the lowest: 0.001

No change

[Monika Gause]

What does the outline view show?

[LambdaEnt]

[Monika Gause]

Is there anything that prevents you from uniting the horizontal lines and the ring? If not, I would just do that.

[LambdaEnt]

I just cropped the white lines out of the blue circle, then let the white background show through!

[LambdaEnt]

Your suggestions inspired it! Thank you.