I have a Geeetech Prusa I3 "Pro" C (dual extruder), and have been having a print issue with both heads, which leads me to believe the issue may not be with the heads.

This first picture demonstrates the "rippling" on the side. I had tried to show the artefacts on underhangs by putting undercuts in the 20mm cube, but my slicer added moderately decent support material and actually had less artefacts than normal.

testboxprint.jpg

This next picture shows what the ripples do to an organic, and also really show the underhang artefacts:

testbeastprint.jpg

I have tried slowing down the printing speed without changing the extrusion speed, but nogo.

1.75mm PLA, printed at 195c and bed at 60c

So what's causing the rippling, and how do I fix it? Worse yet, what's causing the underhang artefacts, and how do I fix that? Is there a common cause I can fix?

And most importantly, what information should I post to get the best reply? As I said at the beginning of the post, I am a total newbie, but I am willing to learn.