Regulating The Strength On The Safety Clutch Device; Upper Feed Adjustment - Reliable MSK-8420B Instruction Manual

b. When the stop plate stops the balance wheel,
more strength is needed to turn the balance
wheel to reset the safety clutch device.
C. Release the button in the bed. So the resetting
of it is OK. (See Fig.26)
5.3.3 Regulating the strength on the safety clutch
device(Fig.27)
a. When the white mark of the eccentric pin aims
at the center of the rock shaft, indicates that
the strength on the safety clutch device is the
minimun.When the white mark points outward, the
strength is properly increased.
b. For regulating the strength of it, move the teeth
- belt and loosen the set screw of the eccentric
pin, and turn the eccentric pin.
c. After regulation, please tighten the set screw.
5.4 Upper feed adjustment (Fig.28)
If the upper and lower feed are not in timing
during sewing, the long hole of the horizontal feed
crank should be adjusted to get the length of upper
feed.
Adjust as the following:
a. Loosen the special screw.
b. Move the special screw upward to reduce the feed
amountor upper layer of material.
c. Move the special screw downward to increase the
feed amount. Theoretically when it is on the
reference line of the horizontal feed crank, the
upper feed amount equals to the lower feed
amount.
d. After adjustment, tighten the special screw.
white mark
eccentric
tighten
loosen
lower shaft
button
reference line
-9-
stop plate
belt
set screw
eccentric
horizontal shaft crank
upper layer feed reduce
link
special screw
upper layer feed increase
26
27
28