ELNA E9020 - Adjusting the Needle Thread Breakage Detection Circuit Board; Measurement of Sensor Output; Relation between Shielding and Sensor Output

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Measure the voltage between ground and CN16-3 pin.
(31) Adjusting the needle thread breakage detection circuit board
Shielding plate OPEN → 4.5 to 5.2 V
Shielding plate CLOSE → 0 to 0.5 V
Loosen 1 and adjust 2 so that CLOSE is set when the jig of 0.2 mm is put between the thread breakage
shielding plate and the thread take-up spring cushion, and OPEN is set when the jig of 0.4 mm is put between
them.
After the completion of adjustment, apply the screw lock to 1 and 2.
(31) -2 Relation between shielding and sensor output
How to adjust Adjustment drawing
How to adjust
Adjustment drawing
CN16-3 (+)
Tester
CLOSE
0.2 0.4
(31) -1 Measurement of sensor output
Ground
1
2
OPEN