Model G9983 (Mfg. Since 8/09)
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-39-
various functions on the Model g9983 are con-
trolled through the air system. since this is a
complex network of hoses and valves, please
take some time to familiarize yourself with each
item so you can better understand your machine
during adjustments.
the illustration below follows the air travel through
the machine to familiarize you with how it works.
Match the letters in the text with those in the illus-
tration to learn more about each function.
1. the air flows into the machine at the pressure
regulator (a). this should be adjusted to 75
psi.
2. the solenoid valve (C) controls the brake
caliper (b) when signaled by the emergency
stop switch or the limit switches.
3. the switching valve (e) controls the vertical
cylinder (d) which raises/lowers the top roller
(M) to tighten/loosen the sanding belt.
e
M
i
h
p
a
air inlet
C
b
g
n
F
d
J
K
o
F
l
4. the valve (g) controls the air flow volume
that goes to the air eye fork (F), which con-
trols the belt oscillation return.
5. the diaphragm (h) actuates the switching
valve (i) depending on whether air is coming
from the eye fork (F) or the pressure regula-
tor (a).
6. switching valve (i) actuates the diaphragm
(J), which controls oscillation arm (K), which
in turn, moves eccentric shaft (l), which
makes top roller (M) shift back and forth to
control belt movement during operation.
7. valve (o) controls the speed at which the
belt moves back and forth.
8. Knob (n) allows you to rotate the eccentric
shaft (l) to balance the oscillation timing so
it takes the belt the same amount of time to
move in one direction as it moves in the other
direction.
figure 40. this is an illustration of the air control system.
air system
Summary of Contents for G9983
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