1 Topic by mrbi11

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Topic: 3d print curling up at edges

New at this. Pictures are of a print that should have flat tabs to use for attaching with screws to flat surface.
This is try #2, with speed slowed down, extra sticky and so on.
ABS at 245C and bed at 60C (first layer at 70C)

The print was started very well, with quite a few layers, perfectly flat.
Apparently, no matter what i do, the tabs will peel themselves up at some point.
I think the large ring they are attached to is shrinking due to cooling, more than the bottom most layer,
and hence it pulls up the tabs.

Is this a well known problem?
Are there workarounds with design change or temperature settings or such?
Thanks for viewing.

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2 Reply by Tomek (edited by Tomek 2013-11-18 00:54:08)

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Re: 3d print curling up at edges

(1) Bed temp should be higher. Strive for 90-80 celsius if possible.
(2) Clarify;what kind of software are you using? With slic3r or cura you want to enable what they call a "brim"
(3) Use hairspray


This is called curl, please read around for more information. It is common but on a short print like yours even though it's prone to curling in some ways, it should be easily resolvable with a combination of a brim, hairspray, and a higher bed temp.

Also (4) Why did you choose 245Celsius for your printing temperature? Is this recommended for your filament?

Many other filaments are better suited to a lower temp, except basically the afinia/up! premium brand, which is great (though perhaps not worth the cost.) Or, if your particular print reports higher temps than actual temps.

3 Reply by mrbi11

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Re: 3d print curling up at edges

Thanks! That helps.

Will add brim, using slic3r.

temps picked from ranges talked about in my Rostock kit.
Filament says 220-260.
I take it you would go lower? 230? 220?

I can set my bed to whatever temp, but i may have to update the limits programmed in.
I can go to 90/80.

I did use hairspray.

I think I will modify the print a bit. Have to think about how.

Its basically an inch high hollow cylinder with tabs. I had it set for about 2 mm thick walls.

Are thicker walls better or worse? I have seen both suggestions elsewhere (thinner and thicker) yea!

4 Reply by Tomek (edited by Tomek 2013-11-18 01:41:33)

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Re: 3d print curling up at edges

Ok! Well give it a shot with a generous brim and higher bed temp, that should help. I would try maybe 235 for your filament. Depends on a lot of factors, I don't know what exactly yours is but a slightly lower will theoretically have less deltaT for contraction.