-16-
3.Guide sample of oil mass adequacy
1) The guide sample shown in the right-hand figure(see Fig. 10) may be finely adjusted (
increased or reduced) as per different sewing processes; however, excessive increase or
reduction shall be avoided. Too little oil mass may lead to rotating hook heating, and over
much oil mass may lead to contamination of the sewing materials.
2)Test the oil mass 3 times using special oil mass confirmation paper till the oil traces in
-dicated by the special paper show no changes.
3
.油量适合标样
1
）上图标样(见图
10
)可根据不同的缝纫工序需求进行增或减的微调整，但应注意不要增加
或减少过多。油量过少时会引起旋梭发热，油量过多时会污染缝料。
2
）用油量测试纸测试3次，直至确认3次油量测试纸油迹均无变化为止。
Caution:
1.Prior to the above-mentioned operation, remove the knockout plate and check whe
-ther there is oil in the oil box.
2. Do not use fingers to touch the hook or other running components of feeding mech
-anism when checking the amount of oil for the hook to avoid the accident.
3. Use the following procedure to check the amount of oil being supplied to the rotary
hook when replacing the rotary hook or when changing the sewing speed.
of paper can be used as the lubrication amount check sheet
②
)
5) Check the amount of oil which has spattered onto the sheet
②
.
-eed for approximately 3 minute without sewi
-ng any material (following the same start/sto
-p pattern as when actually sewing)
4) Place the lubrication amount check sheet
②
underneath the rotary hook
③
and hold it
there.Then run the sewing machine at the no
-rmal sewing speed for 10 seconds.(Any type
图
24Fig.24
过多
Too much
过少
Too little
供油量正常
Correct
飞溅油
Spattered oil
压脚压力的调节 (图
25
)
Adjusting the Presser Foot Pressure(Fig. 25)
19
1
.旋松调压螺母②。
2.
若将调压螺钉①朝顺时针方向(即
A
方向)转动
时，压脚压力将增强；若朝逆时针方向(即
B
方
向)转动时，压脚压力将减弱。
3
.调节完成后旋紧调压螺母②。
1.Unscrew pressure adjusting nut
②
.
2
.Presser foot pressure is increased if pres
-sure adjusting screw
①
is turned clockwise (
namely in direction A); the pressure is reduce
-d if the screw is turned counterclockwise (na
-mely in direction B).
3.Screw down pressure adjusting nut
②
wh
-en adjustment is over.
