Help with Shugart SA801 8" floppy with 230v 50 cycle motor...

John C. Ellingboe john at guntersville.net
Mon Nov 24 14:39:51 CST 2008


I just got off of the phone with Small Parts "AGAIN" and was informed 
that after messing around and dragging their feet for 6 months they 
finally decided to refund my money and were not going to be handling the 
items I ordered.  You may not want to trust them with your money, I know 
that I can't...


Chuck Guzis wrote:
> On 24 Nov 2008 at 10:26, ROBO5.8 wrote:
> 
> 
>>I scoped out the index pulse to verify and it was running about 1.2x faster
>>than it should (420 rpm versus the expected 360 rpm).
>>
>>Is there anything I can do to get this drive operational other than to sell
>>it another who has a 230v/50 cycle environment.
> 
> 
> I have a Qume 842 8" drive with a 50 Hz motor that I modified to work 
> on 60 Hz.  I replaced the motor pulley with one that was slightly 
> smaller and the drive has worked fine for the last 20 years or so.
> 
> Where to find an appropriate pulley might be an issue if you don't 
> have machining facilities.  In my case, it was dumb luck--I found 
> what I needed in one of Halted's hellboxes.  It wasn't a smooth, 
> crowned pulley like the original, but rather a flanged timing belt 
> model.  It was close enough that it worked (and is still working)--
> the small teeth in the pulley surface didn't seem to transmit any 
> "noise" to the spindle, probably because of the large mass of the 
> spindle pulley.
> 
> You might want to have a look at http://www.smallparts.com if you 
> don't want to "roll your own".
> 
> Cheers,
> Chuck
> 
> 
> .
> 



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