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13
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Adjustment Procedures
Results of Improper Adjustment
1) Remove four setscrews
1
in the needle rocking motor cover.
2) Remove three setscrews
2
and counter sunk screw
3
.
(At this time, loosen setscrew
4
in the needle bar support
base shaft connecting stud as well. Refer to the item “(7)
Adjusting the needle entry position”.)
* When assembling, after temporarily tightening screws
3
and
2
, tighten in the order of
3
and
2
.
3) Move the needle bar in the direction of the face plate, draw out
the needle bar support base shaft from the needle bar support
base shaft connecting stud, and remove the shaft together with
the needle rocking unit base from the machine arm.
In case of replacing or adjusting the needle rocking motor
* For the replacement of the sensor, refer to the item of the
sensor.
4) Loosen setscrew
5
in the motor link bracket and remove link
9
.
5) Loosen four setscrews
6
in the needle rocking unit base and
remove the motor to replace.
6) Tighten setscrew
5
in the motor link bracket.
(Check also setscrew
7
in the motor link.)
In case of replacing or adjusting the sensor
7) Confirm that the sensor lamp lights up in the hook adjusting
mode.(See p.18.)
8) Loosen setscrews
8
in the sensor installing plate, move the
sensor installing plate to the right-hand end once, and gradually
move it to the left-hand side. Tighten setscrews
8
when the
sensor lamp goes out. This state is “0” of the origin. (However,
it is when the link is at 90˚.)
™
To determine the position of the sensor, it is convenient to
make a positioning jig as shown in the figure on the left.
