| Using Current
Sensing for: Improved Part Counting, Counting Motor Starts, and as an Hour Meter Interface Traditionally, proximity sensors and limit switches are used for part counting. These both have positional limitations that are responsible for part count errors. If a part is constructed with one continuous twisting, stamping, boring, or punching motion, a review of the current used by the drive motor will reveal a distinctive pattern of current peaks. Using a TCS Series selected for overcurrent sensing and an electronic counter can produce a very accurate count of the parts being manufactured. The TCS’s trip point is selected so that each operation of the drive motor is viewed as an overcurrent event. The solid state output of the TCS closes causing the counter to advance one count. This same concept can be used to count the number of starts of an electric motor, compressor, or pump so that regular maintenance can be performed. If the counter is replaced with an hour meter, the system will indicate the number of hours in operation. |
 PLC=Programmable Logic Controller AI=Analog Input Module AO=Analog Output Module |
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