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Corners eh, tricky. The only thing I know will help is to slow the speed down. I also suspect that a thinner layer depth may help, as maybe slamming on the fans after layer one. Knowing that close up photography tends to make it look worse than it is then another solution is to get a high quality file (e.g. from a jewellery parts store) and smooth the end result, followed by some baby oil to bring the lustre back.

It would be helpful to know your print settings.

A pic of the short side with two holes would be useful. There seems to be some "interference" between the two holes; slowing down will certainly help reduce that.


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1) I think you are seeing inner slicer issues showing through to the outside. It should help quite a bit to use a thicker shell. Try setting shell to .8 (two passes) or 1.2 (3 passes). Always use a multiple of your nozzle which is .4mm. Never use a shell of say .5mm.

2) Alternatively this could be overextrusion caused because the printer slowed down on the corners but pressure was still high in the nozzle. That would be fixed by slowing down the print speed. I consider 30mm/sec very slow and 100mm/sec to be fast. But sometimes I even go down to 20mm/sec.


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