Description - UBI EasyCoder 501 Service Manual

UBI EasyCoder 501 – Service Manual
11. LABEL-TAKEN SENSOR
11.1

Description

Label-Taken Sensor
The point of detection of the LTS is
situated 10 mm (0.39") outside the inner
edge of the paper web and 22 mm (0.87")
in front of the dot line on the printhead
(present type of LTS).
In the old type of LTS (distinguished by
the absence of any semicircular slot in
the bracket), the point of detection is
situated 24 mm (0.95") in front of the dot
line, whereas the lateral position is the
same.
Vertical detection range is adjustable
from 5 mm (0.2") above the edge of the
tear-off/dispenser edge to max. 50 mm
(2") below the edge (with strap fitted on
P-607).
The Label-Taken Sensor (LTS) is an optional device for the
EasyCoder 501 E and EasyCoder 501 SA, which enables the
printer's software to detect if the latest printed label, ticket, tag etc.
has been removed before printing another copy.
The label-taken sensor is usually factory-fitted, but it is also
available as a kit for upgrading of existing printers. It cannot be
fitted in combination with a paper cutter.
The label-taken sensor consists of a photoelectric sensor with a
bracket and a connection cable. The sensor is fitted inside the front
hatch, see illustration below.
The photoelectric sensor emits a narrow beam of light, which will
be reflected back to the sensor by any label, ticket, tag, piece of strip
or backing paper, that has not been removed from the outfeed area.
A prerequisite is that the web is fed out along the inner wall of the
printer.
The LTS is connected to P-606 on the CPU board. The sensitivity
of the receiver can be adjusted by means of the potentiometer WR-
602 and the intensity of the emitter by a strap on P-607 on the CPU
board.
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