I manage to reach about 2000rpm and then the rotor just dies, what's wrong?
Reason: Poor wrist rotation / starting technique
Solution: Follow the correct technique as outlined below
Detailed Explanation: (Note: from time to time we
will receive a correspondence from a new customer who has purchased a
Powerball but is unable to successfully activate the rotor. In these
cases, the first reaction is to suspect that you have purchased a
faulty unit! We are here to reassure you that in absolutely every such
case that we have seen in the past, the cause of this has been either
as a result of using an incorrect technique (99%) or, as a result of
the plastic starter cord tip (or other such foreign object) entering
the inner cavity and jamming the mechanism (1%)... removing the foreign
body is covered in another FAQ here - while learning the correct
technique is covered in the following information).
Once you have initially jump started the rotor with the cord (please
click on the following video for a visual solution or review the
written instructions here) it is important that you quickly synchronise
your wrist rotation speed so that it fully aligns with the rotor speed
in the ball.
From experience, you will see that a good, sharp pull on the cord will leave the rotor spinning at around 2500/3000rpm.
From that point, unless you begin to �agitate� the rotor by rotating
your wrist in a correct fashion, the rotor will begin to decelerate and
the speed will effectively die (natural laws of physics! :o)
You therefore must begin rotating your wrist at a slow, steady pace
so that it manages to sync perfectly with the spinning rotor in the
sphere and help to both sustain and build its speed.
This is easier to do than it sounds;
If you are a beginner with Powerball, we recommend wide, lazy wrist
turns, such as if you were stirring a pot, whisking eggs or waxing a
car - about 5/6� in diameter, about 1 or 2 turns each second.
It is all about �feel� - you will immediately know that you are at
the correct speed as you will begin to feel a resistance to your wrist
rotation efforts (when you are out of sync, there will be no
resistance, the rotor may "slap" around noisily inside the sphere and
it will feel as if you are just turning your hand around the wrist
joint - when in sync however, there will be a pleasant, soothing
resistance to your efforts and the Powerball will suddenly feel much
heavier in your hand!)
Once you feel this resistance (otherwise known as Gyroscopic
Inertia), slowly begin to increase the speed of your wrist rotation
(NOTE: it is important that only the wrist rotates - your arm must
remain steady and in the one position) - this will serve to increase
the actual speed at which the rotor is spinning which, in turn, will
increase the resistance being inflicted on your hand/wrist/arm.
Once again, if you are trying to turn your wrist too fast while at
these slow starting speeds or, if your turning circles are too small,
you will hear (and feel!) the rotor slapping noisily inside the sphere
- if this happens, simply slow the speed of your turns or increase the
diameter of the turn (dimensionally)... this will immediately help to
bring you back in sync with the spinning rotor and the speed will build
proportionally once again.
So remember, if it hits 2000rpm from the pull start and then dies, you are doing it wrong! :o)
For a useful reference, please click here to load a video clip which will clearly demonstrate the
required action.