JUKI LK1903B-311, Инструкция по эксплуатации

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11. Detecting mechanism of the button feeder components and the adjustment
WARNING :
Perform the work in the state where the sewing LED goes out so as to prevent accidents caused by abrupt
start of the sewing machine.
* When the sensor is ON, LED (red) lights up, and when
the sensor is OFF, the LED goes out.
Fig. a-
❶
Triple-pawl dog ❹
BUT ON
BUT ❶
LED (red)
Fig. a-
❷
1–
1.5 mm
Fig. b- ❶
Fine positioning
sensor dog ❼
RFIN ❺
RFIN ON
LED (red)
Fig. b-
❷
1–
1.5 mm
(1) Adjusting the button positioning detection switch (BUT)
Button positioning detection switch ❶ (hereinafter called BUT) which incorporates a proximity sensor is a sensor to detect
whether a button exists within positioner ❷ when actuating the positioner (triple pawl).
(It turns OFF when a button exists in the positioner or turns ON when it does not detect any button there.)
Draw the iron core of positioning solenoid
❸ when there is no button in positioner ❷ , and the triple pawl will be closed. In
this state, loosen the fixing screw of triple pawl dog ❹ , and move the triple pawl dog until BUT ❶ which has been in the
OFF state turns ON. Then further move the triple pawl dog forward from the aforementioned position (Fig. a- ❶ ) by 1 to 1.5
mm (Fig. a- ❷ ), and tighten the fixing screw of the triple pawl dog.
Then, confirm that BUT ❶ turns OFF when the triple pawl clamps a ø10 mm button. Also confirm that BUT ❶ turns ON when
the triple pawl is closed after taking out the button from it.
Be sure to remember that adjustment (2) should be carried out whenever the aforementioned adjustments have been carried
out.
(2) Adjusting the fine positioning completion switch (RFIN)
Fine positioning completion switch
❺
(hereinafter called RFIN) which incorporates a proximity switch is the sensor to detect
a button when the button is set on the carrier pin.
Place a ø10 mm button in positioner
❷
, draw the iron core of positioning solenoid
❸
to make the triple pawl clamp the
periphery of the button. In this state, loosen the fixing screw of fine positioning sensor dog
❼
, and move the RFIN
❺
to
the position where the RFIN
❺
changes from its OFF state to ON state (Fig. b-
❶
). Then move back the RFIN
❺
from the
aforementioned position by 1 to 1.5 mm (Fig. b-
❷
), and tighten the fixing screw.
Then confirm first that the RFIN
❺
turns OFF when the triple pawl clamps a ø10 mm button. Remove the button from the
triple pawl, and confirm that the RFIN
❺
turns ON when the triple pawl clamps the periphery of the lower section of the work
attachment
❻
.
Note, however, that adjustment (1) should have been completed before starting this adjustment.
(Caution) The RFIN functions to detect a button when the button is completely set on the carrier pin by
turning itself ON/OFF (the difference between the outside diameter of the button and that of the work
attachment) and to open/close the shutter.
It is not necessary to re-adjust switches (1) and (2) when the current button is replaced with a button of
which diameter is different from that of the current button.
❶
❷
❺
❹
❸
❻
❼