(1) Adjustment of hook oil amount
1. Adjust the oil amount by means of the oil amount adjusting screw
that is attached to the hook shaft base.
2. When the oil amount adjusting screw is turned clockwise, the oil
amount increases. When it is turned counterclockwise, the oil amount
decreases.
3. Measure the oil amount in 5 seconds. If the oil amount is too less,
this can be a cause of malfunction. For oil amount check, be sure to
observe the oil amount in the hook race section.
4. Adjust the oil amount so that it is not lower than the minimum level
(as illustrated).
[For reference] When adjustment of hook’s oil amount is intended, it
is necessary to raise the sewing machine first of all.
In regard to the method of raising the sewing machine, refer to the
Instruction Manual "VII-5 How to lay down the sewing machine".
Be sure to perform the measurement after putting the sewing machine
in the storage position.
(2) Cleaning of the filter section
Periodically (approximately once every 3 months), clean the filter
sections and (2 positions).
1. Loosen the setscrew of the lubrication tube holder for removal
from the bed.
2. Loosen the pipe stopper to take out the tube and the joint .
3. After the removal of dust attached to the net area of the joint ,
recover the initial state.
(3) Setting for hook oil amount check
1. Display the check program menu screen.
When the key is kept pressed for 3 seconds, a check program
button (A) is displayed in the screen.
When this button is pressed, the check program menu screen is
displayed.
2. IO1 head aging mode
Press the head aging button (B) in the check program menu
screen to display the head aging screen.
C: Used to set up the number of head revolutions. Set 2500
revolutions.
D:Used to set up the revolving time. Set 5 seconds.
E:Used to set up the stop time. The stop time can be set up
arbitrarily.
Set up any stop time as you like.
F: Used to select whether the center knife is driven in interlinkage
with the sewing machine.
It is very dangerous if the center knife is driven in the middle of
hook oil amount check.
This check shall be done in the state of power OFF, without fail.
G: Used to start the revolution of the machine head. The revolution
stops when it is pressed again.
H:Used to return to the menu. (Effective only in the middle of
revolution stop)
– 20 –
o If the oil amount lowers below the
minimum level, this can be a cause
of problems such as hook abra-
sion, seizure, and so on.
Adjustment Procedures Results of Improper Adjustment
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