Great news, the gear set printed, without a hitch! Bad news, I must be doing something wrong with my own design files. Back to the books I went and I learned lots of things. Different plastics melt at different temperatures. You can define this when you "slice" the file before printing it. There are about a hundred other parameters you can define when you slice the file.
So what is slicing? That is the process of translating a three dimensional CAD file (usually in .stl format) into commands that the printer controller can understand. The file that the printer controller reads is called a gcode.
Airwolf3d recommended I use an open source slicer program called Slic3r. Looking at all of the things you can control there was a bit overwhelming, but I eventually learned where to fine and set the basic parameters such as temperature, speed, and slice thickness. Airwolf3d also provided me with some prebuilt slicer configuration files that worked with my 5.5 printer. These configurations were the basis of my work, and I just tweaked them here and there as I learned how to use the features.