Double sheet detection involves ultrasonic thru-beam sensors, consisting of an ultrasonic emitter and receiver with integrated evaluation algorithms optimized especially for these applications:
- Misfeed detection
- Label counting
- Splice detection
Printing books and magazines is a complex process involving a lot of paper handling and high-end electronic controls. In order to effectively print in volume and at high speeds, you need sensors that can identify any problems in the printing process fast and with high accuracy. You wouldn’t want to be surprised when finding out that you need to reprint 1,000 or more copies because a single blank sheet of paper made its way through to the middle of the books.
Double sheet control can detect three different states:
- No sheet
- Single sheet
- Double sheet
The double sheet sensor visually indicates its status by changing its LED color, depending upon the detected paper feed. When the sensor detects a single sheet of paper, the LED light turns green. The LED turns yellow when no sheet is detected. If the sensor, by any chance, detects that two sheets of paper simultaneously pass, it is indicated with a red LED light.
The double sheet sensor has an emitter/receiver separation of 20 mm – 60 mm, with the optimal gap being 45 mm. Its housing is made of nickel plated brass.
You may also need these accessories to mount and install your double sheet sensor:
- Mounting bracket for double sheet monitor
- 1 m length emitter-receiver extension cable
- 2 m length emitter-receiver extension