SATO M8485S Manual do Operador descarregar pdf (Página 41)

Sensor Threshold Level

The 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 - 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 4-4 for location

of the sensors) 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.

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, the

GAP (X.XV)

INPUT (X.

XV)

Section 3. Configuration

SATO “S” Print Engines 9001034 Rev E Page 3-13

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SATO M8485S Manual do Operador Página 41

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