50Hz vs 60Hz fixed drive speed ?

From: Dwight K. Elvey <dwight.elvey_at_amd.com>
Date: Thu Feb 19 18:05:50 2004

>From: "Don Maslin" <donm_at_cts.com>
>
>
>On Thu, 19 Feb 2004, Tony Duell wrote:
>
>> >
>> > Hard drives are almost always driven by a DC motor (off the +12v line).
>>
>> Perhaps you could tell that to my RK05s, RK07s, RL01s, RL02s, SA4000s,
>> etc, etc, etc.
>
>And the Quantum 8" fixed drives which used an AC motor and
>required different motor pulleys for 50 and 60 cps power.
>
> - don
>

Hi
 I remember when I worked for Intel ( late 70's ). We bought
a number of things like printers and disk drives that were
for 220VAC/50Hz. On the disk drives, we used a file and some
fine sandpaper to reduce the pully size on the motor to work
with 60Hz. The voltage problem was solve by a transformer
the was to be used on the uScope product. They made nice
auto-transformers. The printer I modified just needed the
transformer and the change of a cogged belt pully. I bought
the pully from a place called Motion Industries. Now if it
was 24VAC/400Hz, that is a different conversion problem.
 For those doing the auto-tranformer method, you need to
know that only half the power goes through the transformer
for a 110/220 or 220/110 change.
Dwight
Received on Thu Feb 19 2004 - 18:05:50 GMT