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Hello everybody 1. when do we need

Hello everybody 1. when do we need

(OP)
Hello everybody
1. when do we need high speed balance exactly in industry?
2. is it possible a balanced rotor in 40000 rpm (above second critical speed), show unbalance in 3000 rpm balance machine؟

RE: Hello everybody 1. when do we need

2 you can't reliably balance for high speed operation (defined as more than 1/2 the first critical, for the sake of argument) in a low speed machine. The reason is that a low speed machine assumes that the shaft is rigid, which of course it won't be above 2nd critical.

Cheers

Greg Locock


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