Safeline Signature, Operating And Instruction Manual

Page: 65 / 168

OPERATING INSTRUCTIONS
4618-021 49
Notes On Passing Product Through the
Detector
NOTE
The product should be continually moving, the
detector will not operate with standing/stationary
product in the aperture.
To ensure that the detector is set up correctly and will
operate satisfactorily during normal production, we
recommend that the product used for automatic set up
is passed through the detector in the worst case
position and orientation which would occur during
normal production.
The worst case product effect condition is when the
greatest disturbance of the coil system/largest product
signal is experienced. This occurs when the coil
system condition changes from no product to
maximum product.
With individual or boxed/cartoned product the worst
case product effect condition occurs as the product
enters and leaves the detector. If the product is
rectangular the product effect signal will generally be
more severe if the product enters the detector
aperture long edge leading, as opposed to short edge
leading. The gaps between the products will create
the worst case product effect condition. If successive
products are touching a reduced product signal will
result.
For the majority of product types the worst case
condition occurs the closer the product is to the faces
of the detector aperture.
The technique of setting up to the worst case product
effect condition will ensure that no false product
rejections occur during normal running conditions.