I have printed this off what I designed and seem to be getting ringing around some spots of it not sure why. 30mm/s 2 walls 25% infill 0.3mm nozzle 0.11mm layers
That's not ringing it is too regular and not fading away, it looks like a vibration. This can be due to a belt out of alignment such that it is catching on the edge of a pulley or a part of the frame. It could also be due to a belt being too tight.
