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:


Thanks, 

--
Jason Perkins

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