Ripples and waves on the sides of round parts.

boxsterjohn
Posts: 19
Joined: 23 Nov 2014, 12:10

Ripples and waves on the sides of round parts.

Post by boxsterjohn »

I have been having problems with this Ripples and waves on the sides of round parts. No matter what filament i use (ABS, PLA, PETG, etc...) the ripple is always there.(see attached) I don't have this issue straight wall parts. Any help would be appreciated.
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Ripples
Ripples
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pjr
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Joined: 05 May 2015, 10:27
Location: Kamnik, Slovenia

Re: Ripples and waves on the sides of round parts.

Post by pjr »

I seem to recall reading somewhere that reducing acceleration settings can cure this problem.

May well be incorrect, but may be worth a try.

Peter
boxsterjohn
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Joined: 23 Nov 2014, 12:10

Re: Ripples and waves on the sides of round parts.

Post by boxsterjohn »

Hi Peter,
Where can I adjust the acceleration settings?

John
Giovanni V.
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Joined: 18 Nov 2014, 09:34

Re: Ripples and waves on the sides of round parts.

Post by Giovanni V. »

boxsterjohn wrote:Hi Peter,
Where can I adjust the acceleration settings?

John
With the Cubex you can't set the acceleration.

Are you still printing with the same settings ? before the parts were OK and now you have the ripples ?

If yes, check the belts tensions.

If the belts are OK, try to reduce the perimeter speed.
boxsterjohn
Posts: 19
Joined: 23 Nov 2014, 12:10

Re: Ripples and waves on the sides of round parts.

Post by boxsterjohn »

I only get these ripples and waves when I am printing round parts with slight overhang. As you can see in the photo the part is printing very well until it starts to flare out at the top. That's when the ripples start.
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20170623_074304.jpg
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lonesock
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Re: Ripples and waves on the sides of round parts.

Post by lonesock »

What layer thickness and extrusion width are you using for those prints? I start getting surfaces that look like that when each perimeter isn't supported enough by the perimeter below it. You could do a quick test with thinner layers, or wider extrusion width, or slower / more cooled perimeters.

thanks,
Jonathan

P.S. When the new beta to arrives, it has some features that will be useful [8^)
boxsterjohn
Posts: 19
Joined: 23 Nov 2014, 12:10

Re: Ripples and waves on the sides of round parts.

Post by boxsterjohn »

Jonathan,
You were right. I have a 0.4 tip and my extrusion width was 0.3. With a little bit of experimentation, setting the extrusion width to 0.5 reduced the ripples.

Thank you for your advice,

John
boxsterjohn
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Joined: 23 Nov 2014, 12:10

Re: Ripples and waves on the sides of round parts.

Post by boxsterjohn »

Now I have another issue. For dual extrusion the keep warm setting is not working. While the other extruder is printing the other extruder cools completely down.
Giovanni V.
Posts: 241
Joined: 18 Nov 2014, 09:34

Re: Ripples and waves on the sides of round parts.

Post by Giovanni V. »

boxsterjohn wrote:Now I have another issue. For dual extrusion the keep warm setting is not working. While the other extruder is printing the other extruder cools completely down.
Check into "Printer G-Code"/"Cool and retire old ext" you must have this : M<EXT+1>04 S<TEMP>
boxsterjohn
Posts: 19
Joined: 23 Nov 2014, 12:10

Re: Ripples and waves on the sides of round parts.

Post by boxsterjohn »

Yes that gcode is there.
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