Old Industrial Ceiling Fans - Guess what? The name of this article is just out and out misleading. The sole actual "minus" as it pertains to a ceiling fan is what it will take to get one correctly installed. Ceiling fans can be hard to install for the inexperienced do it yourselfer. In some cases, where the ceiling fan will be installed, you'll need to run an electric line to the region. Hiring a capable, bonded and licensed electrician will most likely save you a lot of grief in the long run, unless you're skillful at achieving this sort of thing.
There's also the minor "disadvantage" that entails the problem of periodic care. Properly installed, a ceiling fan will give you many, many years of nice cooling and cost-savings on your own heat bill (assuming there is a fan which allows you to reverse the blade direction). Granted, you should wipe the blades down in a while but everyone has household cleaning chores to take care of from time to time.
On occasion, ceiling fans get out of balance and need minor adjustments. The most common offenders are loose screws that attach the blades to the motor housing, blades that aren't at precisely the same angle (pitch) as the remaining blades and also a blade or blades that weigh slightly more than the others. Make sure that all the screws are tight, without going into great detail. When they truly aren't tightening the ones that have come loose and run the fan. In the event the wobbling has quit, your issue has been solved.
Otherwise, use a yardstick or other straight piece of wood and place it (together with the fan stopped) vertically at the outer edge of among the blades. Rotate the blades by hand to ensure that the stick is touched by every blade. Turn the fan on again and see if you have solved the difficulty.