I am getting pretty good at troubleshooting and solving problems but my latest print has an issue I can't wrap my head around. The print is a 6mm high plaque with a 45 degree chamfer starting halfway up.
For some reason there is a bulge all the way around the side when the chamfer starts. I haven't seen this before and small tweaks to speed, temp etc don't seem to make a difference. One or two of the corners have very minor curling (1 layer high maybe) that I would expect would cause something like this but the ridge goes all the way around the perimeter of the print.
The only thing I see in layer view in Cura is that at the start of the chamfer, the printer starts doing a thin zig-zag fill inside the wall to support the next layer (see photo). I am not sure why that movement would cause such a large bulge though.
I am using Ultimaker Silver PLA at 205-210 degrees (60 deg. bed) at .15 layer height and 45-55 mm/s print speed.
Any ideas?