Curling Corners on Upper Layers

Hi All,

I am having an odd problem printer the 20mm calibration cube. Everything adheres to my heated bed OK and I get no curling on the lower layers. However as the build goes higher the corners start curling up a little. This becomes more exaggerated as more height is added.

Can anyone give me a clue as to what would cause this and how to counter it? I will state again that this is not the 'typical' curling issue of lower layers, but curling of upper layers as the build progresses.

Thanks

Andy

you could try printing slower ( allowing cool) or using a fan

good luck

ABS is it?

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Waitaki 3D Printer

Sorry - didn't clarify - PLA at 180 Degrees.

Printing with a fan is the goal, but of course I need to be able to print the fan duct first. I will try printing slower until I have a fan installed.