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Help on this warping

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today I printed a part but got some warping. See here:


As you can see the upper warping is completeley inside the part.

Normally I would expect that edges lift up like the warping in the bottom left corner. The material is PLA Innofil pearl white.

I printed at 230 degree, bed temp. 60 degree. Layer height 0.2 mm, speed 25mm, infill 24%.

The bottom of my part has a thickness of 1mm, the walls 1.6 mm.

So the main part is hollow.

If I use a brim may it helps against the warping at the corner.

But how to get rid of the 'inner' warping?

Should I increase bed temp?

Thanks for any help...


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Maybe you want to check if:

- The glass of the heated bed is clean (clean it with a dish washer agent or similar...)

- the glass really lies on the heating pcb/aluminium as many heated beds (UM2 or HBK) suffer from sink bores not deep enough resulting in the glass laying on the screw heads only instead on the aluminium plate

- a reduction of the fan speed improves the situation


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If you still get it after your bed is cleaned then reorient it to another position on the print bed, print again and check the result. It also would be worth you watching the 1st layer go down and see if you notice anything amiss during layer 1


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thanks for reply, the bed is clean and the aluminium is flat under the glass, I checked.

I measured also the temeperature on several points of the glass bed it is almost 58-60 degrees.

I printed again and watched the first layer, but everything fine.

Would it help to increase the bed temperature? Or maybe start manually with a higher bed temperature for the first layer and reduce it after the first layer with the 'tune' function on the UM2?

Or ist it better vice versa means start with lower bed temperature and increasing after first layer?

Or maybee change my model? The bottom is 1 mm thick, infill 24%.

Would it help to increase the thickness or infill? Or vice versa decrease thickness / infill?

I just want to know what factors will influence the lifting / warping so I can improve next print.

Any ideas are welcome,



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