Cutting circle issues

What would cause my circles to be oblong. Side to side it is right on, top to bottom off 1/4”

Unfortunately, there are a lot of possible causes. The short answer is the accuracy of your frame build and calibration.

I haven’t tilted at this particular windmill in a few months as my current projects only need precision with reasonable accuracy. However, search for posts by @Dustcloud that discuss his quest to eliminate oblong circles. These threads allowed me to find and correct my oblong circle problem when I needed better accuracy out of my Maslow.