Industrial Barn Ceiling Fans - Guess what? The name of the informative article is simply out-and-out misleading. The sole actual "minus" as it pertains to some ceiling fan is what it will take to get one properly installed. Ceiling fans might be hard to install for the inexperienced do-it-yourselfer. In some cases, you'll need to run an electric line to the location where the ceiling fan is to be set up. Hiring a capable, bonded and licensed electrician will most likely save you a lot of grief in the long term unless you're skillful at achieving this sort of thing.
There is also the minor "con" that involves the issue of periodic care. Correctly installed, a ceiling fan will give you many, many years of nice cooling and cost-savings on your heating bill (assuming there is a fan which allows you to reverse the blade direction). Granted, you have to wipe the blades down once in a while but everyone has household cleaning chores to take good care of of from time to time.
On occasion, ceiling fans get out of balance and need minor alterations. Without going into great detail, ensure that every one of the screws are tight. When they're not tightening the ones that run the fan and have come loose. If the wobbling has stopped, your issue has been solved.
Otherwise, utilize a yardstick or other straight part of wood and place it (with the fan stopped) vertically in the outer edge of one of the blades. Rotate the blades by hand to be certain that the stick is touched by each blade. If one or more do not, just (and gradually) bend the blade(s) so that their pitch matches the others and repeat the process until you're satisfied that each blade has the same pitch. Turn the fan on again and see if you've solved the difficulty.