Engraver and engraving method for detecting and measuring run-out associated with a cylinder
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United States of America Patent
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Jul 13, 1999
Issued Date -
N/A
app pub date -
Jun 26, 1997
filing date -
Oct 9, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for automatically measuring a cylinder characteristic, such as a cylinder diameter or a cylinder run-out and then automatically adjusting the engraver in response to the measurement and subsequently engraving the cylinder to account for such characteristic. The engraver includes a run-out detector for detecting a cylinder characteristic of the cylinder on the engraver and the run-out detector includes an LVDT sensor and a run-out circuit for generating a signal generally corresponding to a shape of the cylinder surface. The run-out circuit is capable of generating a measured run-out using the signal generated by the LVDT sensor. The method and apparatus also provides a method and apparatus for automatically adjusting for the cylinder characteristic using manual, mechanical and/or electronic features of the method and apparatus.
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