15
B. For 470 motor (external location detectors)
Turn the pulley manually to position the needle bar at the lowest point about to move back up. Then, loosen the fixed screws on
the film as in Fig. 11 and align the “DOWN” film with the film adjustment baseline and the sensor housing baseline as in Fig.
15&16. Tighten the fixed screws just enough so that the film does not rotate. In the same way, place the thread take-up lever at
the highest point, then loosen the fixed screws again and adjust the “UP” film as in shown the figure. Be careful that the
“DOWN” film A that was tightened before does not move when adjusting the “UP” film.
Figure 16 enlarges the film position. As can be seen in figure 16, set the end of film-adjusting arrow to sensor base.
[Figure 15]
[Figure 16]
Setting the film when
the needle is in a up-
stop position
Setting the film when the
thread take-up lever is at
the highest point
Film-Adjusting Arrow
Setting Area
Sensor
Baseline
Film Adjusting
Base
Sensor Base
9) Check for the stop position of the machine
Check for the machine stop position after moving the needle up
and down by pushing the reverse button. See whether the
carved sign on the arm and the white carved sign on the pulley
are aligned when the needle is in an up position. If not,
adjustment to the photo film of the location detector or to the
location of the magnetic holder will be necessary since there
may be problems with the trimming. In other words, the
needle’s up-stop position should be identical with the stop
position of the needle bar after the trimming operation, which
would signify that there is nothing wrong with the operation
timing of the trimmer. (See Figure 17) (Refer to the explanation
about the Adjustment of Location Detector on page 13.)
[Figure 17]
White carved sign
10) Explanation of reverse button function
Pressing the back tack button or reverse button during forward
sewing will start reverse sewing immediately. When you stop
the machine and restart it by stepping down on the pedal with
the reverse button already pressed down, you can perform
reverse sewing from the beginning. When the machine is in a
“stop” mode, you can change the up-down position of the
needle bar by pressing the reverse button. Lightly pressing the
button once when the needle is in a down-stop position will stop
the needle bar in a high position. Pressing the reverse button
twice within less than a second when it is in an up-stop position
will stop the needle bar in a low position. In short, the button
delivers two functions: one for reverse sewing and the other for
converting vertical position of the needle. (See Figure 18)
[Figure 18]
Down-stop
Up-stop
Arm carved sign
Reverse button
