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Cura creating bad/missing layer

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Posted · Cura creating bad/missing layer

I am fairly new to cura and 3d printing so I apologize if the problem is obvious. 


I have an stl file that when I slice it I get a layer in the middle (somewhere about 60 layers in) that is very thin, maybe empty but the model shows it solid.  I can see this bad layer in preview with cura.  My layer height is .3 but if I change the layer height to .301, the bad layer seems to clear up.


It looks like simply changing the first layer height to 0.301 will also fix it based on cur preview.


I have attached a zip file with the model stl, the gcode, exported config and photos of the bad print and a good one( still printing on the printer).





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Posted · Cura creating bad/missing layer

In reading some other posts on the forum someone said to save the project so all settings would be saved.  So I attached the project file showing the problem.  After slicing, open select preview and there will be a line around the perimeter.  Simply changing layer height or initial layer height for .30 to .301 or .299.  It does not seem that any other value other that .3 causes this problem.


Why is .3 such a problem?


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