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- Path: spacenns.space.honeywell.com!usenet
- From: bjheyboer@space.honeywell.com (Brian Heyboer)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Why 150RPM and not 270RPM?
- Date: 2 Feb 1996 17:05:06 GMT
- Organization: Honeywell Space Systems
- Distribution: world
- Message-ID: <4etg82$f1k@spacenns.space.honeywell.com>
- References: <pdNqgxg.lmcclure@delphi.com>
- NNTP-Posting-Host: bjheyboer.space.honeywell.com
-
- In article <pdNqgxg.lmcclure@delphi.com> Lonnie McClure <lmcclure@delphi.com>
- writes:
-
-
- >Also, no doubt cutting the RPM by a smaller amount would have made it
- >easier to modify standard HD floppy drives to rotate a stable speed at
- >the slower RPM, as it would be closer to their normal spec.
-
- I don't know what the max rate of Paula is, but I can tell you why halving was
- likely chosen. If you look at the schematics for floppy drives, they include a
- controller chip that has a pre-set rotation speed of 300 RPM. All that is
- necessary to halve the speed is to duplicate the set of sensors that input to
- the speed controller. Reducing by some odd amount would have required a major
- change in the electronics, though you are likely correct that it would have
- resulted in a more stable rotation.
-