Hikari HW782TA, Instruction Manual Book

Page: 74 / 206

31
Always turn off the power, unplug the machine and then well-
If you use the machine with high stroke, be sure to run the
machine at a speed less than 4,500 rpm.
Changing the needle bar stroke
Adjusting the supply of oil for the needle bar chamber
If you change the needle bar stroke, be sure to readjust
the needle height (see page 26), the looper (see page 27) and
the needle guard (see page p28).
Caution
CAUTION
qualified technicians should change the needle bar stroke.
The amount of oil to be supplied to the needle bar chamber is
factory-set properly, so do not adjust it under normal conditions.
However, if it should be necessary, follow the steps shown below.
6
5
A
A
4
1
2
3
WARNING
Do not adjust the screw beyond the range shown below.
Otherwise the machine may be damaged.
Loosen nut 6. Adjust the amount of oil by turning screw 5.
The adjust range is within 45°clockwise or counterclockwise,
referred to the groove on screw 5 (see the illustration).
●
To decrease the amount, turn screw 5 clockwise.
●
To increase the amount, trun screw 5 counterclockwise.
After this adjustment is made, tighten nut 6.
45° 45° To decrease
To increase
1.
Loosen screws 2 on motion 1.
slightly turn eccentric 3 in the direction of the arrow with a
screwdrive until groove A
2.
To change the needle bar stroke,with turning screw 4 of
eccentric 3.
To position the needle bar stroke with stndard stroke
To position the needle bar
stroke with stndard stroke
To position the needle bar stroke with high stroke
To position the needle bar
stroke with high stroke
To turn eccentric stroke 3’s groove to the utmost left.
To turn eccentric stroke 3’s groove A to utmost right.