Eggbot is having some trouble drawing circles. I have included the image link below. The circle on the left is what I am trying to draw and the circles on the right are being drawn on the egg. Just to clarify, the examples were drawn by hand. It draws better when I plot the drawing closer to either egg cup. I have tried adjusting the potentiometer for the stepper motors and it has not solved the problem. What seems to be the problem?