SYSTEM ZUR UEBERWACHUNG VON BELASTUNGSZUSTAENDEN BEI EINER PRESSE ODER STANZE

摘要

A load monitoring system for indicating and controlling loads intermittently applied to force carrying members, such as pitmans, columns, tie rods, and toggle mechanisms of production presses. The system includes a monitor that has a main circuit board and a plurality of removable and replaceable electronic modules, each module having a base with rows of closely spaced depending pins that are insertable into connectors in the main circuit board to positively secure the module in place and electrically couple its components to the circuit board. The illustrated monitor includes a signal conditioning module which may be calibrated for the press on which the monitor is to be used, after which time it may be used in replacement or modified monitors without the necessity for their recalibration. The system further includes means for manually resetting the overload control contact means following an overload and for automatically overriding this reset after a short period so as to again render operative the load control means even though the reset means is inadvertently or intentionally maintained in its reset position. An overload counter also is provided for counting the overloads and is driven from a DC power supply with a minimum of power consumption.