non smooth XY resolution

[bullfrog64]

I'm extremely new to 3D printing and i was printing some gears i found off of thingaverse. The only problem i had was there are spaces on the X and Y plane and i cant figure out what is wrong with the printer I tried tweaking all the settings. the layer height, the infill, the shell amount, and the feed rate.

Can someone please try to explain to me? I'm really confused and just want to be able to print smoother objects

This is the object I was printing http://www.thingiverse.com/thing:40410

And this is the printer I'm using http://www.amazon.com/G-Star-Extrude.../dp/B00JQQF8RY

Software - Replicator G and python