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Below is a sample design to of a baffle plate that could be used for with sensors
mounted at standoff differences of ½” – 2”
Figure 6.1 – Baffle Plate
Note!
When mounting baffle plates, be aware that there may be two types of plates to handle
the ½” side to side stagger between heads. Make sure that the slots in the baffle plate
match up with the position of the lasers for each sensor and adjust the baffle plates so
that no lasers are hitting them.
6.2.3 Photocells
If you are designing a system that requires exact width measurements then consider
using photocells in conjunction with the sensor data. The sensors are intended for range
measurement and wane detection. Photocells can give better width accuracy especially
for ‘square’ material.
6.2.4 Scanner Frame
To protect the cabling from damage, run the cabling for the sensors inside the frame
support beam to one end of the frame where power supplies and conduits to computer
room are located.
Having a design which incorporates a positive air pressure blower/purge system built
into the frame helps in keeping the bottom sensors clear of debris. On installations
without air purge, if the bottom sensors are cleaned every 2 to 4 hours things still run
fine. However, performance can be degraded if the heads are running dirty. When
installing an air purge using mill air, make sure to filter the air to remove oil and water.