Baumer BA Scatec10 15 - Manual (Page 15)

User manual Scatec-10 / -15 15 / 44 Baumer Electric AG
Version 2011-03 www.baumer.com Frauenfeld, Switzerland
A helpful rule of thumb is:
Output pulse length p in milliseconds must be shorter than 1.2 million divided by the
intended production rate given in copies per hour
Example: production rate: 130,000 copies/hour
resulting maximum output pulse length: 1,200,000 / 130,000 = 9.2
This relation is represented by the solid line in the diagram above. The theoretical
value (dashed line) represents the case where the interval between copies becomes
equal to the length of an output pulse. Exceeding the recommended value of the
output pulse length increases the risk of missing edges due to irregular intervals
between copies. Very often the reason for missed copies is not a flaw of the sensor
but such fluctuations of the interval in combination with too long an output pulse
length.
C1:
Running direction [RunDirection]
Input values: 0 = lead leading
1 = trail trailing
Function: to define the direction in which the copies are transported.
Comments: A front edge (i.e. an edge facing the laser beam) is detected independently of the
running direction. However, for certain false pulse suppression modes to operate
properly, the running direction must be set correctly.
The terms leading and trailing are used according to the following sketch:
Running direction of
copies
leading
trailing
Front edge
(detectable)
Tail edge
(non-detectable)
Scatec-1x
trailing
Tail edge
(non-detectable)
Scatec-1x
Front edge
(detectable)
leading
Running direction of
copies
mounted above conveyor:
mounted below conveyor:
conveyor
conveyor