JUKI LB-6 Manuel D'utilisation page 91

(4) Adjusting the sensitivity of the luminescence sensor
WARNING :
Do not depress the starting pedal since there is the danger of abrupt rotation of the sewing machine.
To avoid the maloperation, it is recommended to perform the work without putting the V belt.
Green/red LED
Point
A
Max.
Point
Point
A
B
Material
Point
A
Variable resistor for
sensitivity
Luminescence
sensor
Sensor blind
Middle
Point
B
1) Adjust the sensitivity with the variable resistor for
the sensitivity adjustment of the luminescence sen
sor as described below.
Without material : Green and red light up.
With material : Green lights up and red goes off.
* Sensor blind is in the state of "open" as shown in
the figure on the left.
2) Adjust the sensitivity of the luminescence sensor
in accordance with the material to be sewn.
[Adjusting procedure]
1) State without material on the sensor
Turn the variable resistor for the sensitivity adjust
ment from the maximum position gradually toward
the direction in which the sensitivity is decreased
until the stable indicator lamp (green LED) goes
out. This position is designated as point A.
2) State with material on the sensor
Place the material to be sewn on the sensor
mounted on the cloth plate. Turn the variable re
sistor for the sensitivity adjustment from point A
gradually toward the direction in which the sensi
tivity is increased until the stable indicator lamp
(green LED) goes out. This position is designated
as point B.
3) Set the variable resistor for the sensitivity adjust
ment to the middle of points A and B.
4) Confirmation
Confirm the followings :
When material is not placed on the sensor : Green
and red light up.
When material is placed on the sensor : Green
lights up and red goes out.
The sensitivity adjustment of the material end sen
sor has been completed.
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