PN 9001024
Rev. B Jan. 2000
Page 2-19
SATO CL608 & CL612 SERVICE MANUAL
SECTION 2 – Configuration
Sensor Threshold Level
The CL608/CL612 printer determines the location of the leading edge of the label
by measuring the difference between light levels when it sees either a label edge or a
black Eye-Mark. This adjustment allows you to manually set the threshold voltage
level between the maximum and minimum light levels. DIP switch DSW2-2 selects
the sensor type. If DSW2-2 is in the OFF position, the setting will be for a See-
Thru (or Gap) sensor and the LCD will display GAP on the top line along with the
current setting. If DSW2-2 is in the ON position, the LCD will display Eye on the
top line with its current setting. If the value entered for the bottom line setting is
0.0V, then the printer will automatically calculate the setting when the first label is
fed after the printer is powered on or the head is closed. There are some instances
where the automatically calculated value must be adjusted to ensure reliable label
feeding, such as when the backing opacity or the reflectance of the Eye-Mark
varies significantly within a roll of labels or between label rolls. In these instances
the value should be set using the following procedures.
GAP SENSOR: When setting the gap threshold, the voltage shown on the top
line of the display must be measured with nothing but the backing paper in the
sensor and then again with a label still attached to the backing. The formula to
be used for setting the threshold is:
(High Voltage Level + Low Voltage Level) x 0.5 = Input Value
To access this setting perform the steps:
STEP PROCEDURE
1. Insert a label still attached to the backing into the sensor and close the
Label Hold-Down. Record the voltage shown on the top line of the LCD
panel. This line should have the message GAP on the top line (DIP
switch DSW2-2 = OFF). Make sure the label is all the way under the
sensor and See Through Sensor is aligned over your label.
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