Baumer FLDK 110G1303/S14 User Manual - Page 18

Browse online or download pdf User Manual for Cash Counter Baumer FLDK 110G1303/S14. Baumer FLDK 110G1303/S14 35 pages. Laser copy counter

Print Page

9.2

False pulse suppression

It is generally recommended that the SCATEC-2 should be operated with the false pulse suppression

feature active. In this way, multiple pulses caused by thicker copies (newspapers, folded cardboard boxes

etc.) or by a small crease at the edge can be suppressed.

The false pulse suppression feature ensures that no further pulses can be issued when an output pulse

is active and during the dead time. Activating the false pulse suppression feature causes the sensor to

automatically initiate a dead time when each pulse is issued, whose duration is 18% of the average

overlap spacing. If an output pulse is followed by another in less than about 1/6 of the current average

overlap spacing time, this pulse is suppressed, as it lies within the dead time of the preceding pulse. The

average overlap spacing time is constantly recalculated automatically by the SCATEC-2. This ensures

that the dead time is adjusted if the conveying speed changes. In certain cases, one edge may be

suppressed if the conveying speed is very quickly accelerated, whereas one false impulse may not be

suppressed during very fast braking. However, gaps in the overlapping stream caused when individual

copies are removed or when the overlapping stream is briefly diverted have no effect. The false pulse

suppression feature has no effect on the maximum counting rate as the dead time is shortened as the

counting frequency rises and can even become shorter than the output pulse length. This occurs when

the average copy spacing time becomes less than 6 times of the output pulse length.

Ideally, the sensor would not issue further pulses after a valid output pulse for a specific length, as the

typical distance between two edges is often known regardless of the speed. Anything between these

would be false pulses. However, to allow the sensor to suppress pulses for a specific length and not for

a defined time, it must be synchronized to the conveying speed. This is possible with the Scatec-10 and

Scatec-15.



Always switch on false pulse suppression unless the overlap spacing is highly unregular.

Individual copies may be ignored during abrupt acceleration or if the overlap spacing suddenly

becomes smaller.

Manual SCATEC-2

Version 2021-09

www.baumer.com

Baumer Electric AG

Frauenfeld, Switzerland