SATO CL608VA Operator's Manual download pdf (Page 50)

Sensor Threshold Level

The CL Series printers determine 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 - When setting the “gap” threshold, the voltage shown on the top line of the

display must be measured with nothing but the backing 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 = Start Value

1. Insert a label still attached to the backing into the sensor (see page 3-5 for location

of the sensors) and, if adjusting a CL608 or CL612, 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.

2. Strip the label from the backing and insert the backing strip under the sensor and

close the Label Lid. Record the voltage shown on the top line of the LCD panel.

The voltage ranges measured should be within the following ranges:

Backing with Label Label Backing Only

2.0V to 3.5V Less than 1.0V

If the measured values are outside this range, you may have trouble in finding a value

that will work properly under all conditions. If this is the case, a higher quality

label may be needed to get adequate performance.

3. Calculate the starting point voltage using the formula.

4. Use the LINE key to step the counter to the desired setting. The display will

increment one step for each time the LINE key is pressed. If the LINE key is held

pressed for more than two seconds, it will automatically go into the fast scroll

mode. The reading will advance to a setting of 4.9 (the maximum voltage) after

which it will automatically wrap and start at “0.0” again. If a value of “0.0” is set,

GAP (X.XV)

INPUT (X.

XV)

Section 2. Installation and Configuration

Page 2-329001035 Rev. ESATOCL SeriesPrinters

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SATO CL608VA Operator's Manual Page 50

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