Description - Intermec EasyCoder 501 XP Service Manual

Chapter 12
12. Ribbon Low Sensor

12.1 Description

Ribbon Low Sensor
104
As an option, the EasyCoder 501 XP and 601 XP can be fi tted
with a sensor, that detect the rotation of the ribbon supply hub and
updates a counter. By means of a custom-made application pro-
gram, the counter can be read and used to detect ribbon-low condi-
tions (as opposed to out-of-ribbon conditions, which are supported
by the standard error handling).
On the ribbon supply hub is a code disc with 41 gaps. When the
hub rotates, the photoelectric sensor detects when the light is inter-
rupted and decrements a counter. At startup, the counter is set to
a random value of approximately 65,000 and can be read using
SYSVAR(13), see Intermec Fingerprint v7.61, Programmer's Ref-
erence Manual.
The sensor requires no regular cleaning. However, should any mal-
function be detected, blow the sensor clear from dust or media
residue before deciding to replace it.
The sensitivity of this sensor cannot be adjusted.
Code Disc
Intermec EasyCoder 501 XP & 601 XP – Service Manual