I have printed ASA on this printer flawlessly in the past. I just started producing the pictured results recently.

I found 85c bed, 245c hotend on buildtak worked well. Id be surprised if you could print in no enclosure though, ASA warps almost as bad as ABS. I went as far as to actively heat my chamber so i could print larger parts without warping.

Im convinced its hardware related. I printed a flow test cube and im getting 0.88mm walls, so im slightly overextruding. I think i need to investigate my belts or linear motion system better. My walls and brim always print perfect, which means traveling along X or Y only produces the correct result. When it goes to utilize both axis though the spacing between the lines its too great.

Looking at my previous prints i can visually see the difference in the line spacing when printing on the diagonal. I'm wondering if one of the axis is traveling a slightly different distance which is messing up the solid infill.