Reliable MSK-8900M - Manual (Page 16)

34 34
Stritch
0~0.5mm 0~0.5mm
<-3>
1.8mm
<-5>
2.2mm <-3>
1.8mm
<-5>
2.2mm
0.05mm 0.05mm
b b
35 35
Most Least
More
less
33 33
Timing fast Starelarcl Timing slow
A A B B
<-3> <-3> <-5> <-5>
For example: MSK-8900M
7. Adjust the position between needle bar and feed
dog (Fig.33)
When the feed dog
moves down to the position
which is same with the surface of needle plate from its
highest position,the standard position of needle should
be as follows:
For light and medium weight materials
The surface of feed dog and needle plate
should be same and the pinpoint of needle is 1mm
lower than the needle plate
For heavy weight materials
The surface of feed dog and needle plate
shousd be same and there is a clearance of 3mm
between the pinpoint and needle plate
(1) Uninstall the back cover;
(2) Loosen the screw
on the cam and screw
on the feed cam , slightly turn and adjust the
cam and feed cam ( these two cams are connect
-ed by pin and should turn alternative side)
If the timing of needle is fast, turn as shown in
the Fig.
A
; if the timing of needle is slow, turn as shown
in the Fig.
B
For avoiding materials misplacing, please make
the timing of needle slowly (Fig. B )
For avoiding stitch puckering, please make the
timing of needle fast (Fig. A )
Notice: If turn the cam and feed cam overlar
-ge as Fig. A Shown , it will make needle broken
(3) After adjustment, tighten the screw and
8. Adjust the position between needle and hook
(Fig.34)
Lift the needle bar
from its lowest position ,
while the lowest mark on the needle bar aligns with
the bottom of needle bar bushing
, the tip of hook
should aim at the center of needle .
(1) Turn the hand wheel and lift the needle bar
to make the mark b align with the bottom of needle
bar bushing
When the needle is lifted 1.8mm (for MSK-8900M)
or 2.2mm (for MSK-8900H), the clearance between the
hole of needle and the tip of hook should be 0~0.5mm
(2) Loosen the screw
and make the tip of hoodk
aim at the center of needle .
the lateral clearance between the tip of hook
and needle . should be 0.05mm
(3) tighten the screw
9. Adjust the oil amount of upper shaft and hook
(Fig.35)
(1) Upper shaft
Uninstall the face plate, turn the screw
to adjust
the oil amount of upper shaft
(2) Hook
Lay down the machine head, turn the screw
to
adjust the oil amount of hook.
After adjustment, let the machine be run for 2~3
mim. and confirm the oil amount again