I spent hours trying to dial in the circle test.
At first the circle was shifted towards the front of the printer by about 1/8".
I downloaded the cross gcode and adjusted the x and y galvo to center that on the paper.
After that I adjusted and adjusted the pots and got it as close as I can, but it will not make a perfect circle no matter what. I can hit the top, bottom, right and left dead on, but then the top left and bottom right are sucked inside the circle. If I try to adjust it out there, then it just pushes outside somewhere else.
Is there a such thing as perfectly following the line?
How far can it be off, or do I need to do something else?
I am afraid this is not going to make very accurate parts.