Description - Intermec EasyCoder 601 XP Service Manual

12. Ribbon Low Sensor

12.1 Description

Ribbon Low Sensor
Code Disc
Intermec EasyCoder 601 XP – Service Manual Ed. 3
As an option, the EasyCoder 601 XP can be fitted with a sensor, that
detect the rotation of the ribbon unwind spool and updates a counter.
By means of custom-made application program, the counter can be
read and used to detect ribbon-low conditions (as opposed to out-
of-ribbon conditions, which are supported by the standard error
handling).
On the ribbon unwind spool, there is a code disc with 41 gaps. When
the spool rotates, the photoelectric sensor detects when the light is
interrupted and decrements a counter. The counter is set at power-
up to a random value of approximately 65,000 and can be read using
SYSVAR(13), see the Intermec Fingerprint 7.xx Reference Manual.
The sensor requires no regular cleaning. However, should any
malfunction be detected, blow the sensor clear from dust or paper
residue before deciding to replace it.
The sensitivity of this sensor cannot be adjusted.
Chapter 12
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