To Set The Input Threshold Voltage Level For Gap Sensor - SATO LC400e Series Operator's Manual

Section 3: Operation and Configuration
3.7 SERVICE MODE (Cont'd)

3.7.1 To Set the Input Threshold Voltage Level for Gap Sensor

This procedure allows you to manually set the threshold voltage level of the Gap sensor, between the
maximum and minimum light levels. The input threshold sets the minimum acceptable voltage level based on
overall sensor voltage levels. Once the overall sensor thresholds have been established, the input voltage
may be set.
Note
The input threshold is an average of the low and high voltages.
1. When SERVICE MODE appears on the LCD, press the FEED button.
Note
The next menu screen should display the sensor type selected and its relative threshold levels.
2.
Make sure the correct sensor is selected. GAP should be displayed on the screen.
3.
If GAP is not display, change the sensor type by altering DIP switch DSW2-2 (either software or hardware
DIP switch depending on DSW 2-8 setting).
4.
Physically position the media's liner (backing paper, portion without the label) so that its rests over the Gap
sensor. To stabilize the sensor level, make sure the print head assembly is latched and the media is
threaded correctly after setting the media.
5.
Record the voltage shown on the top line of the LCD panel. The voltage ranges measured should be 0.5 V
or less. This is the low voltage value.
6.
Physically re-position media (label and liner combined) so that its rests over the Gap sensor.
7.
Observe the threshold level displayed on the top line of LCD and the reading should be increased more
than 1.0 V to the last reading. This is the high voltage value.
The voltage ranges measured should be within the following range:
Liner without label = 0.5 V or less
Label and liner ≥ 1.0 V
If the measured values are outside this range, you may have trouble in finding a value that will work prop-
erly under all conditions. If this is the case, a higher quality label may be needed to get adequate perfor-
mance.
8.
Calculate the input threshold voltage using the formula.
(High Voltage Level + Low Voltage Level) x 0.5 = INPUT threshold voltage value
9.
To set the input threshold, press the LINE button repeatedly until the calculated values displayed. The
maximum voltage can be set is 3.3 V.
If a value of 0.0 V is set, the printer will automatically set the level each time the printer is powered on with
labels loaded or the print head is closed.
10.
Once the setting is correct, pressing the FEED button will accept the setting and advance to the AUTO
ONLINE FEED display.
Page 3-18
GAP
INPUT
the low value (Liner without label)
+
[ X.XV ]
Gap sensor threshold
[ X.XV ]
INPUT threshold
LC400e Series Operator Manual