Re: [Avid-L2] Re: HDCAM tape lifespan...

I think it would require much more precise tolerances, tooling, and QC for
every tape manufacturer. Instead, they build a failsafe into the machines,
charge a couple grand more, and you can throw any manufacturer's tape in
and expect it not to ruin your deck. I think magnetic tape manufacturing is
quite precise as is, but you can't figure that every manufacturer is going
to cut width to the strictest tolerance. The machine does the final cut, so
to speak, and even then, only if necessary.


On Fri, Apr 26, 2013 at 10:07 AM, John Beck <jb30343@windstream.net> wrote:

> **
>
>
> Why wouldn't they just do this as part of the tape manufacturing
> process? --J.B.
>
>
> Mark Spano wrote:
> > The slivers get collected by (if I remember correctly) a tape path pad.
> > We're talking about microns here, so it's more like fine hairs. I believe
> > there is a sensor that is also fine enough to detect a previously cut
> > tape's width. The tape path pad starts out white, and in routine
> > maintenance is the first thing to get replaced. The last Sony tech I
> worked
> > along side explained that the ruby cutter is many thousands of dollars,
> and
> > the tape path pad is a few bucks, and that few bucks replacement saves
> > potentially years of life on replacing other parts down the path.
> >
> > If you're familiar enough with the sounds of these decks, you can hear
> when
> > the tape path pad comes in contact with the guides, as it makes a
> repeating
> > click-and-whirr when it's engaged. I believe it's also connected to a
> head
> > pad which lightly cleans the back side of the rotating drum, so you'll
> hear
> > this click-and-whirr sound repeatedly when there are a lot of tape
> errors.
> >
> > This is all information I gleaned from techs years ago, so it may be
> > slightly off from 100% accuracy. But the concepts are solid.
> >
> >
> >
>
>
>


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