In the first article of this series (January 2004), we described the capabilities of various types of straighteners and lev-elers. In the second (April 2004), we said that you could set more consistent results from your equipment by using programmed entry- and exit-roll gaps, mathematically derived for each machine, material and range of yield strengths. In the third article (August 2004), we discussed dimensional variations, shape compensation and trapped stresses. This month's topic: The limits of shape-control equipment, and how operators can avoid exceeding those limits.
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