Thoughts Suggestions appreciated! :D issues i'm currently having with only certain prints...

3D Printing
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Thoughts Suggestions appreciated! :smiley: #trinus3d issues i’m currently having with only certain prints… #3dprinting #pla #3d #thingiverse #printing

Originally shared by David Clunie

http://www.dbclunie.com - So I have a couple of prints that I was doing I derived from http://www.thingiverse.com/thing:961176 . I printed the initial hive file (or a remix actually that just added windows to the back to snake your cable through) and with the initial print I kept getting this terrible banding along the z-axis which I thought might be z-wobble but it seems a bit too “wide” to be so, so I’m not sure exactly what this is or how to fix it or what causes it.

1st & 2nd images

If you run your finger along the walls you can feel the bumps so its not just within the print. could this be a result of some kind of weird infill (which i think i had set to 20% but as you can tell the walls are thin enough where it doesn’t do any infil.

I think created a completely separate file and model (just a single hex pillar and then was going just glue them together in any config I wanted) but was still seeing the banding despite not using any bit of the other file as you can see here…

3rd & 4th Images

then just to check to see if there is an issue with the printer I did a benchy after printing out the single hex pillar and the benchy came out practically perfect. So again i’m not sure what those bands are…

5th and 6th Images (tugboats done right after single hex pillar)

I think the only diff in settings is that the banding hive/pillar is 300 microns vs 150 microns of the benchy or whatever pangos initial slicing is…

any ideas, suggestions, or if others have seen this behavior, any info would be helpful. The hive cable storage is still very much useable and the banding doesn’t really effect the projects i’m currently doing just don’t want it effect the quality of project later that might rely on perfect finishes and or accuracy…

thanks in advance!
-dbclunie
#3dprinting #trinus3dprinter #trinus #trinus3d #3d #printing #thingiverse #cableorganizer #geek #nerd #pla

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The only thing that I can think of, is that a single layer of the boat is going to be much larger than a single layer of the hex tubing. Uneven cooling due to constant new material on top leading to a “lumpy” strata effect maybe? Anyway, all I can think of off the cuff. If so, try putting an active cooler blowing just over your print bed.

3

I get banding similar to what you have pictured here when I crank the print speed up too much. it is usually more pronounced on large straight areas with sharp corners.

4

This happened to me when i had my steppers configured with a stepsize 157.5 someone told me that the firmware makes rounding errors so layers aren’t consistent. Try a slightly different step size and see if it changes.

5

not sure that is easy to do on the trinus

6

i just did a single pillar and no steps. hmmm i did check smart infill will investigate further and update blog… :slight_smile: