Calibration Cube Corners Rounded - Used To Be Sharp!

[mitchfx]

I'm noticing that recent prints of my calibration cube for filament multiplier have become somewhat chamfered or rounded at the corners. These edges used to be very sharp on the same printer using the same filament, and I'm wondering if this could be a sign of slop in my belts or elsewhere.

[mitchfx]

Looks like my plastic cooling fan died. That might explain this and many other problems that started a day ago

[JoeJ]

Yup, a broken cooling fan would definitely cause this!