Detector improves productivity

5 January 2006


Maxson has developed a 'low roll diameter' detection feature that automatically slows a sheeter to a stop when a pre-set roll diameter is reached at the rollstand. This allows the operator to monitor other aspects of the sheeting process, yet still allows the line to stop before a roll completely expires. It protects the sheeter from damage caused by a flailing tail running through the cutter and the consequent downtime of re-threading a sheeter rather than splicing the leading edge of the new roll to the end of the old web.

The automatic tension system uses a proportional control design. A sensor fixed on the rollstand's brake mounting plate monitors the number of rotations. Using these inputs, the controller calculates the diameter of the roll, lessening brake pressure automatically as the circumference reduces.

The 'low roll' diameter is the size of the roll at which time a signal is sent to the sheeter drive to slow line speed to a minimum. The operator can set this parameter from the maximum roll diameter to the core diameter. The 'stop diameter' is the parameter at which the controller sends a signal to stop the sheeter from the minimum line speed it has been running since the low roll diameter was achieved. The diameter can be set within the range of core diameter and low roll diameter.

  

Contact

Maxson Tel: +1 401 596 0162




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