Re: [CAD_CAM_EDM_DRO] crank as hell

I would use a larger motor, but one designed for starting under full load.
This has built in slip to minimize starting shock, but will still transmit
more rpm faster to the centrifuge.

I forget the type letter, but I seem to remember that they are type D.
They don't cost any more than full torque starting motors. I believe they
just have a bigger gap between the rotor and stator. You may be able to
get a used compressor motor.

This is not an off topic question.

GE may be able to give you some information on this problem and the actual
build up of speed under the load you are applying to help you size it.

Ted

>For a actually working centrifuge (High frequency induction for metal
>casting)
>I shall put a new motor on that starts up much faster.
>The 7 kg cross beam of 73 cm length needs with the original 250 watt
>(1/3 hp)
>normal single phase motor two turns to come on speed.
>Result: The castings come out defective.
>First I thought about to put a 1 or 2 hp three fase motor on it.
>Are there other motor types that still have a better cranking at the
>start up???