What is the best location for a Leveler?
Misconception: It was once common practice for manufacturers to locate the Leveler after the Shear. However, today most manufacturers position the Leveler before the Shear. What is the reason for doing so and how does Leveler location affect the finished parts?
Clarification: When Levelers first came into widespread use several decades ago, it was typically located after the Shear. While this position offers the simplest integration into the line, it also imposed certain limitations.
Because parts were measured and cut-to-length prior to being leveled, shape irregularities could affect part tolerances. The leveling process could also change the parts dimensionally.
As a result, as part tolerances became more critical, manufacturers began locating the Leveler before the Shear. This allowed the Leveler to operate continuously while permitting the strip to be leveled prior to being measured and cut‑to‑length.
Locating the Leveler before the Shear also eliminates the tendency of the entry Leveler rolls to mark the leading edge of each sheet.
Summary: To simplify installation, the practice of installing the Leveler after the Shear is still used today occasionally when adding a Leveler to an existing line. However, because of the benefits, most new systems manufactured today place the Leveler before the Shear.
Conclusion: Although most misconceptions are based on assumptions and misinterpreted information, they are often perceived as being fact. However, by reviewing the surrounding information more closely, most can be explained.