Pulley Driven Ceiling Fans - You know what? The name of this informative article is only out-and-out misleading. The sole real "disadvantage" in regards to some ceiling fan is what it will take to get one correctly installed. Ceiling fans may be difficult to install for the inexperienced do it yourselfer. In some instances, where the ceiling fan will be installed you will need to run an electrical line to the location. Unless you are adept at doing this kind of thing, hiring a capable, bonded and licensed electrician will more than likely save you much grief in the long term.
There's also the minor "disadvantage" that involves the problem of periodic maintenance. Properly installed, a ceiling fan will give you many, many years of pleasant cooling and cost-savings in your heating bill (assuming there is a fan which allows you to reverse the blade direction). Allowed, you have to wipe the blades down once in a while but then, everyone has household cleaning chores to take care of from time to time.
On occasion, ceiling fans require slight adjustments and get out of balance. The most typical culprits are loose screws that attach the blades to the motor housing, blades which are not at exactly the same angle (pitch) as the remaining blades and also a blade or blades that weigh somewhat more than the others. Without going into great detail, make sure that all the screws are tight. Whenever they aren't tightening the ones that run the fan and have come loose. Your problem was solved if the wobbling has ceased.
Otherwise, make use of a yardstick or another straight piece of wood and place it (together with the fan stopped) vertically in the outer edge of one of the blades. Rotate the blades by hand to be certain that each blade touches the stick. If one or more don't, merely (and gradually) bend the blade(s) so that their pitch matches the others and repeat the procedure until you are satisfied that each blade has the same pitch.