RE: [CAD_CAM_EDM_DRO] Re: spindles powered by REGULAR AC induction motor

Peter -

I regularly take my Bridgeport 1720-rpm motor to 150%, but I have
no idea what the limit is. I'm also tempted to take a smaller
motor and crank it slowly up to 600% speed to see what happens.
(I'll take Jon E's approach and hide under the bench, of course)

Carlos Guillermo
VERVE Engineering & Design

-----Original Message-----
From: ptengin@... [mailto:ptengin@...]
Sent: Tuesday, December 12, 2000 1:07 PM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: [CAD_CAM_EDM_DRO] Re: spindles powered by REGULAR AC
induction motor

In a message dated 12/11/2000 8:32:11 PM Hawaiian Standard Time,
ballendo@... writes:

<< Ballendo

P.S. Just in case the humor above is misplaced. I don't want to
confuse you. You just need a REGULAR AC induction motor.

>>

Ballendo,

I don't recall this point being covered. How much over speed
would you feel
comfortable with in regards to a REGULAR AC induction motor? I got
a couple
of 3hps and a 5hp. All are TEFC motors, 1725 RPM I believe. I
really don't
like going over 90 Hz. Suppose I could try 120+hz with a scatter
shield over
them or something :)

Peter
THRD, Inc.