Consistent ripples on prints
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On genuine duet board there are C shaped artifacts that you might not see in photos clearly, 2 at the very right side are more visible (red sample) on x axis photo (still it might be caused by minuscule upobservable differences in machines) .
Somehow i lean towards motor incompatibility to duet. Blind guess but those motors are not made equal. -
@agniusm said in Consistent ripples on prints:
On genuine duet board there are C shaped artifacts that you might not see in photos clearly, 2 at the very right side are more visible (red sample) on x axis photo (still it might be caused by minuscule upobservable differences in machines) .
Somehow i lean towards motor incompatibility to duet. Blind guess but those motors are not made equal.Yeah, were I in your position I might order a similar stepper that is "supposed" to be a bit better quality and try it. It won't break the bank.
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I have ordered couole of these motors: https://www.omc-stepperonline.com/nema-17-stepper-motor/nema-17-bipolar-09deg-44ncm-623ozin-168a-28v-42x42x47mm-4-wires-17hm19-1684s.html?mfp=149-step-angle[0.9]
Are they OK? Just to remind, for 24V system -
I have been contacted by a member with the same issue on completly stock unit. I can strike out extruder now without even bothering testing it.
Motors shoukd be next week but i am off with kids to rehabilitation center so next weekend maybe. -
@agniusm Hi,
Any update on this ?
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@hussainsail2002 Yes, i have swapped for 0.9 degree stepper motors and the problem is gone to a minimum. The ripples do not feel physically anymore
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I think this is somehow a weakness of the cartesian / 'i3' design. I go back to fighting it now and then, but don't see it on my delta or the one print I've done on my new-to-me corexy.
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@robm It must be. On other designs both x and y are more or less weight balanced and the print stays put.
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@agniusm Thanks I had the rippling on my MKS board , when I changed to duet it got eliminated.
Any Idea what the reason behind this could be ?
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@agniusm Did the spacing change (assuming you can still see a lesser effect)?
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@nophead Its very hard to see, basically impossible. i will see if i have old sample to get you photo comparison
P.S. Black with 1.8 motor, clear with 0.9 motor if you can spot the difference
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Black shiny plastic is always the worst for showing defects in my experience, so comparing it with clear is always going to be difficult and anything clear or white is hard to photograph with detail.
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@nophead yes bit the ripples were visible on clear too. Now they are gone.
