Ripples - replace Z screws?

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Ripples - replace Z screws?

Postby butterfingers » Thu Apr 10, 2014 4:02 am

Although generally quite happy with the print quality that I'm getting, I do get annoying ripple type artifacts in vertical surfaces.

Is this a function of the Z axis screws? Better to replace with Acme ones from TechPaladin or something?

Example below (apologies for the filthy camera sensor):

Image

Thanks!
butterfingers
 
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Re: Ripples - replace Z screws?

Postby orcinus » Thu Apr 10, 2014 12:39 pm

If it's solely due to threaded rods, then they aren't wobbly, but damaged, as the ripples aren't very regular.

Try tightening your X and Y belts first.
Maybe slightly increase the current to the steppers too.

It looks like a superposition of backlash and wobble to me, the previous suggestion should eliminate the former and make the wobble clearer.
orcinus
 
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Re: Ripples - replace Z screws?

Postby cvoinescu » Thu Apr 10, 2014 12:40 pm

Some but not all the irregularity looks like Z wobble. Instead of replacing the screw, why not try the Z wobble mod? And what Orcinus said.
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