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Re: [PPLetterpress] Windmill Registration Problem

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  • Fritz Klinke
    The register pins are called lay pins or guides, and come in 5 different lengths. They are still made by Heidelberg and we stock them. Fritz ... From:
    Message 1 of 11 , Oct 4, 2004
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      The register pins are called lay pins or guides, and come in 5 different
      lengths. They are still made by Heidelberg and we stock them.

      Fritz

      ----- Original Message -----
      From: <RoyVM@...>
      To: <PPLetterpress@yahoogroups.com>
      Sent: Monday, October 04, 2004 11:06 PM
      Subject: Re: [PPLetterpress] Windmill Registration Problem


      >
      > Check the rubber inside the gripper, be sure its clean. If it has been
      > replaced
      > with vinyl tape (electrical or bookbinding) which can be and is often done,
      > make sure it is
      > not sticky.
      >
      > Make sure the gripper is properly holding the stock. Bring a sheet into the
      > gripper,
      > stop it as the gripper enters the press and pull on each side of the sheet to
      > make
      > sure the bite is even and adequate. . The gripper pressure can also be
      > adjusted on each
      > individual arm.
      >
      > If you are not using register pins on the guides, I suggest you do. The
      > guides with
      > the flat lip do not always catch the sheet when it is dropped.
      >
      > Decurl the stock. If the curl is up it can fall over the guide specially at
      > the tail of the
      > sheet. Use a longer pin at the rear of the sheet if possible. It also might
      > be necessary
      > to slightly bend the register pins open so the sheet will not override them.
      >
      > Check the bite on each gripper arm. Bring a sheet up with the suckers until
      > the gripper
      > closes on it. I then draw a line along the gripper edge. Do it to each arm.
      > If the bite is
      > considerably different between arms, it may be necessary to force them into
      > alignment.
      > I would not attempt this yourself, but a Heidleberg serviceman with windmill
      > experience
      > usually has a long bar to accomplish this.
      >
      > You may be running the press too slow for the momentem of the sheet to reach
      > the
      > sheet stop. I have found also that is is often necessary to move the stack
      > side guide
      > about 1/8" to 1/4" further to the right than the adjustment for the brass
      > guide stop.
      >
      > I have also found that too much speed with certain types of stock, will cause
      > the stock
      > to bounce back from the front guide, after it is released.
      >
      > I currently have three 10 x 15 windmills and they are all different. No two
      > run exactly the
      > same.
      >
      > Good luck,
      >
      > Royvm
      >
      >
      > [Non-text portions of this message have been removed]
      >
      >
      >
      >
      >
      > Yahoo! Groups Links
      >
      >
      >
      >
      >
      >
      >
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