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Top thickness not the same as bottom thickness

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Hi there,


I have searched the forums but not found specifically what I am looking for.


I am having trouble with my UM2 not printing the same top thickness the same as the bottom thickness.


I have the settings with PLA set as follows:


-Layer height =0.1

-Shell thickness = 1.2

-Bottom/top thickness = 0.6

-Fill density = 20


It only seems to do one 0.1mm run for the top surface leaving a poor surface finish on top.


I am very new to this so please excuse me if there is any obvious issues.



Any help would be much appreciated.




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So the layer view only shows the top 4 or so internal layers so you have to slide down on that layer view control. I sliced your part and got the same 144 layers but when I slide the layer view down all the top surfaces seem to have 6 layers (I had to check many "top" surfaces.

Once you click on the layer slider once you can also use Shift+Up arrow or down arrow.


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Ok so maybe I should look at increasing my bottom top thickness? Maybe because of the curve being rather horizontal in the lower stages and the 0.6 thickness is only measured in the Z direction it's leaving little layer height as it moves across/up the curve - if that makes sense?


I have added some pics of the print!


IMG 20140830 155722


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This is called "pillowing". You can read about it here. Your fans probably aren't at full power. Go back to cura settings and make sure the fan is at 100% well before this somewhat level area - possibly 1mm? 5mm is the default I believe:

Look at first picture - top left here:



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