Presence Sensors And Encoders; Presence Sensors Mounting; Normal Package Detecting; Small Package Detecting - Datalogic SC6000 Installation Manual

2.5 PRESENCE SENSORS AND ENCODERS

2.5.1 Presence Sensors mounting

Both photocells must give to the controllers the same information at the same time, so some
precautions must be taken:
The photocells must detect the same number of objects.
The photocells must detect the same length of the object.
If it is possible, avoid to mount the photocells at the beginning of the conveyor belt
because the packages should jump passing from one belt to the other.
There are two possibility to connect the two photocells.

2.5.2 Normal package detecting

The first possibility is to put the two photocells one above the other as show in the picture above.
This is the easiest and preferred way because the PS Line parameters and the Pack/Track origin
XYZ=0 are equal for both SC6000. In this case it is not possible to detect lower packs with both
photocells because they are at different height, one over the other.

2.5.3 Small package detecting

If lower packages must be detect, it is possible to mount the two photocells side by side as show in
the picture above.
In this way it is possible to detect lower packs with both photocells because they are at the same
height, but there is a different position along the Y coordinate between the two SC6000. In this
case the Scanners Pack/Track Calibration must be taken from the Working photocell, see the
coordinate origin XYZ=0 on the picture above, and the following parameters must be set:
SC6000 Working
SC6000 Protecting
XYZ=0
PS Working
Operating Modes
Operating Modes
PS Line (mm)
PS Protecting
PS Line (mm) = 0
PS Line (mm) = negative value