I think it goes back a lot farther than that. This baby certainly had
flex cables on the heads. With the right access pattern the heavy,
hydraulically actuated read/write heads were prone to setting up a
sympathetic side-to-side vibration that could cause the machine to try
to walk across the floor. I've seen one break its 400 volt power cable
when it started to walk before I could stop it. But I don't think it
broke flex cables on the heads. I operated one for a year in 1965/66.
It was part of a manufacturing control system which operated pretty much
24/7. I don't recall any other failures beyond the stretched power
cable and a burned circuit board caused by contaminated water from the
A/C system on the floor above dripping through a crack in the floor and
into the machine. The cat's meow. 25-28 million characters (not bytes)
storage capacity and it only cost $2,100/month on lease. Woo hoo!
<http://www-03.ibm.com/ibm/history/exhibits/storage/storage_1301.html>
Chuck Norcutt
Mark Dapoz wrote:
> On Tue, 8 Apr 2008, Winsor Crosby wrote:
>> Sorry I was not more clear. I have puzzled over how to get the data
>> off a sensor that is moving around. It seems like the usual flexible
>> cable connected to the analog to digital converter and image
>> processing chip would eventually have flex failure problems. Just
>> wondering how they get around that. Or is the movement so small
>> fatigue is not a factor?
>
> I doubt the flex cable is a problem. How many times have you seen a
> CD/DVD rom fail due to a bad flex cable? That technology is quite old
> and is likely very mature by now.
> -mark
>
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