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4279Re: troubleshooting

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  • Gerald Lange
    Jun 3, 2005
    • 0 Attachment
      Jessica

      94FLs are a tad softer than other plates, don't know if this is the culprit or not. I'd recommend a hardness rating of 65-70 Shore D minimum. You might also think about switching to a higher grade plate brand.

      Gerald

      --- In PPLetterpress@yahoogroups.com, Jessica Spring <springtide@i...>
      wrote:
      > Tom & Gerald--
      > The plates are 94FL. I do have the steel bar at the bottom, so I can try
      > taking that off, and for comparison I can try a steel-backed plate.
      The last
      > bit of the mystery: my vacuum has a simple on-off switch and half
      the time
      > the button won't stay on. I've replaced the button itself, but the
      problem
      > remains, which Jet attributes to humidity. Hmmmm. I have to let it
      sort of
      > warm up, then it stays on. As Charles suggested, I think the vacuum is a
      > stinker (AKA "wildly out of whack") and this plate happens to reveal
      that in
      > a way I hadn't seen consistently with type.
      >
      > Jessica
      >
      > > From: "Gerald Lange" <bieler@w...>
      > > Reply-To: PPLetterpress@yahoogroups.com
      > > Date: Fri, 03 Jun 2005 06:02:55 -0000
      > > To: PPLetterpress@yahoogroups.com
      > > Subject: [PPLetterpress] Re: troubleshooting
      > >
      > > Tom
      > >
      > > Interesting speculation but I doubt the vacuum is such, in any of
      > > these machines, to be able to pull a polyester-backed plate into the
      > > vacuum line. That would sort of be a major engineering flaw. I process
      > > both steel-backed and polyester-backed plates in my machine and I
      > > can't imagine this to be the case. While polyester-backed plates are
      > > certainly flexible (and a bit unnerving to those accustomed to
      > > steel-backs), they are not flexible enough to be drawn down into that
      > > thinly etched vacuum line, unless there is something wildly out of
      > > wack with Jessica's vacuum pump!
      > >
      > > Gerald
      > >
      > >
      > > --- In PPLetterpress@yahoogroups.com, typetom@a... wrote:
      > >>
      > >>
      > >> In PPLetterpress@yahoogroups.com, Jessica Spring wrote:
      > >>> there is now a subtle but visible "plaid" where the vacuum lines
      > > produced
      > >> more suction.
      > >>
      > >>
      > >> I'm guessing you are using polyester-backed plates and the vacuum
      > > is sucking
      > >> hard enough to distort the contact between the plate and the
      > > negative, by
      > >> pulling the polyester material into the vacuum lines. I use
      > > steel-backed
      > >> plates. Never seen any such effect. I wonder if a thin support
      > > layer beneath the
      > >> plate material might solve the problem?
      > >>
      > >> Pure speculation! but I'd guess it's such a subtle effect that it
      > > wouldn't
      > >> show on normal text or image areas. You wouldn't notice the plaid if
      > > the lines
      > >> had other irregular variations already! A solid pattern with thin
      > > rules
      > >> would test the limits of the system just about every way possible!
      > >>
      > >>
      > >> Best wishes. Let us know what you discover....
      > >> Tom
      > >>
      > >> Tom Parson
      > >> Now It's Up To You Publications
      > >> 157 S. Logan, Denver CO 80209
      > >> (303) 777-8951
      > >> http://members.aol.com/typetom
      > >>
      > >>
      > >> [Non-text portions of this message have been removed]
      > >
      > >
      > >
      > >
      > >
      > >
      > >
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      > >
      > >
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