There are tutorials online explaining how to do it but you have to know to look them up.
Very basically you run the fan at its lowest speed and watch to see where it wobbles and you put the weight on the opposite side of the pointer which it wobbles. Usually about 25% of the way along the length but you have to do a bit of trial and error to work out exactly how far along it needs to be.
But it’s better to watch the videos because they’re clearer and it’s easier to understand when you have a visual reference
There are tutorials online explaining how to do it but you have to know to look them up.
Very basically you run the fan at its lowest speed and watch to see where it wobbles and you put the weight on the opposite side of the pointer which it wobbles. Usually about 25% of the way along the length but you have to do a bit of trial and error to work out exactly how far along it needs to be.
But it’s better to watch the videos because they’re clearer and it’s easier to understand when you have a visual reference
This is also how tire balancing works for cars. Except they have a machine that does the calculations for position and weight.