Issue with not getting round parts

[98Dragonova]

Cant seem to get pure round parts to print and
happen or dial it in also not the right

Need help done thee step mm to get 20x20x20 block smack on but that all it

Any help be great

Sam

[asusdk]

it could be that one of your belts is not tight enough, try to tighten your belts, should fix the problem