CDC 9766 Drive and packs

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Feb 1 17:23:12 1999

I wrote:
> so don't get the idea that you can
> run it in your house or garage.

John Lawson <jpl15_at_netcom.com> replied:
> Ayyy! Sez 'oo?
[...]
> But it is a trivial matter to run any three-pahse motor from
> single phase... one uses capacitors to shift the phases of the
> windings in proper relationship. It takes a knowledge of R/C
> networks and a good AC ammeter to finely balance the currents in the
> leads, but it can be done for the price of the caps. If one has
> access to a large surplus or appliance salvage yard, so much the
> better. I have run several machines this way.

Have you actually run a 9766 or another comparable drive that way?
Everybody talks about doing it, but I've never yet heard any documented
case of it being done for a removable-pack disk drive using an AC
synchronous spindle motor.

I'll believe it when there's a documented case of it being done, and
working successfully. Until then, I'll stand by my claim.

Cheers,
Eric
Received on Mon Feb 01 1999 - 17:23:12 GMT