Re: Insides of a Widget disk

I was thinking about this more... What is the group's opinion of opening up a *working* disk to apply more glue to the graticule? I'd hate for it to fall off on my good drive and ruin it, or at least require it to be reformatted.

Makes me glad that for all the moving my machine has done (Indiana to Michigan, around in Michigan, then Michigan to Virginia) it hasn't been damaged!

-J

On Fri, Jan 31, 2014 at 10:12 PM, Tom Frikker <tom.frikker_at_email.domain.hidden> wrote:

> Very cool! Great pictures: I've never seen the inside of a Widget before,
> and this will be helpful for future repairs. Thanks for uploading!
> -Tom
>
>
> On Friday, January 31, 2014 1:30:36 PM UTC-5, compu_85 wrote:
>>
>> Figured this would be interesting to the group:
>>
>> Several years ago I picked up an "as is" Widget disk from eBay. I didn't
>> pay much, and wasn't upset when it made horrible grinding noises when
>> powered up.
>>
>> Last night I was fiddling with my Lisa again and recalled a post saying
>> there was a glass graticule inside the drive. I wanted to see how this was
>> arranged, so I opened up the dead disk:
>>
>> https://lh5.googleusercontent.com/-ozPp5nVpBZY/UuvnZSSwXfI/
>> AAAAAAAAD_k/-Ims8n5D5H4/s1024/P19189500.jpg
>>
>> You can see that the head arm is attached directly to the voice coil
>> actuator, and the graticule is mounted in the upper right. Here is a closer
>> picture:
>>
>> https://lh5.googleusercontent.com/-5y2pirtYJLI/UuvnaAIV9ZI/
>> AAAAAAAAD_I/wOEuZMGOmQs/s1024/P19189901.jpg
>>
>> If you look closely you will see a corner is chipped off of the glass. I
>> believe that is why this drive failed... glass chunks got under the lower
>> head and it scratched all the disk surface off. I had a peek with a
>> fibrescope and it wasn't pretty... entire sections of the platter were
>> ground off. In this picture you can see some of the shiny flakes spread
>> around inside the disk:
>>
>> https://lh5.googleusercontent.com/-3SsF9HMp14I/Uuvnb27KhMI/
>> AAAAAAAAD_U/tkSInzYJ4zQ/s1024/P19190503.jpg
>>
>> Thanks,
>>
>> --
>> Jason Perkins
>>
>> --
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-- 
Jason Perkins
313 355 0085

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