Microsonic LCA-2 - Manual (Page 38)

Page 38 of 51 Parameter change in the Label-/Splice Sensors esp-4 and esf-1
T
EACH
-
IN
-M
ETHODS
The esf-1 can reliably detect high-transparency, reflective materials as well as metallised labels and labels
of any colour. The measurement cycle time automatically self-adjusts to the sound power required. For
thin labels and backing materials, the esf-1 can work at its maximum speed, with a response time of < 300
µs.
To be able to detect special labels, for example labels with punches or perforations, there are three
different teach-in methods available.
A) L EARN BOTH BACKING MA TERIAL AND LABEL DYN AMICALLY
During the teach-in process, the backing material and its labels are guided through the fork at a constant
speed.
The esf-1 sensor automatically learns the signal level for the labels and for the gaps between the labels.
This is the standard teach-in for labels.
B) S EPARATE TEACH - IN FOR BACKING MATER IAL AND LABELS
The signal level difference for the backing material and labels might be very slight. In order to still scan
labels with very little difference in signals, teach-in for the signal levels is done separately: teach-in is
firstly done for the backing material and then for the label on it. The switching threshold then lies between
these two signal levels.
C) L EARN W EB MATERIAL ON LY
Web material is generally processed from a roll. The splice to be detected is hidden somewhere in the roll.
There is a separate teach-in method available for this purpose, in which only the web material is learned.
The esf-1 detects the level difference at the splice and sets its output.
E ASY T EACH
With EasyTeach, you have a simplified Teach-in process that you have to activate once before initial
commissioning.
To use EasyTeach, you have to decide whether the sensor will act as a label or a splice detector.
Once EasyTeach is activated, you can't switch between NCC/NOC any more.
The EasyTeach functionality is available for sensors with lot numbers > 12xxxxx.
Insert the web material into the fork and carry out one of the three standard Teach-in methods or
EasyTeach.