Creative Engineering ROCK-A-FIRE EXPLOSION - Page 41

Operation
Step by Step Description Cont.:
Step I. The Individual Valve: (Refer to Drawing Page
3-015) The valve does basically one thing,
switching the air from port B to port A. The valve
consists of two basic parts, the solenoid and the
air chamber. With the valve in a static position,
air should be coming out port B. No air should be
coming out of port A. When the valve is either
electronically or manually activated, (using the
manual override button (A) the air flow will
switch from port B to port A. No air should come
out of port B when the valve is activated.
Step J. The Flow Control: (Refer to Drawing Page 3-016)
After the air leaves the valve bank it goes
through an air line to a flow control. The flow
control effects the individual movements of the
characters. Some of the flow controls are located
at the valve bank, and some are located near the
cylinder they effect. (Refer to the Bit, Valve and
Movement Charts for a listing of flow control
locations. Pages 1-011 thru 1-014) All the valves,
unless the valve is unused, have 2 flow
controls. The Flow control adjusts the air coming
out of the cylinder, hence the statement "When in
doubt, Meter Out!" (Inglis's Law), the arrow on
the Flow Control points toward the valve bank. In
the case of a single acting cylinder, where 2 Flow
Controls are in one line, and the air flow is
adjusted both out going and returning.
Step K. From the flow controls the air goes through air
lines to the Cylinder. At present we use single
and double acting cylinders. The single acting
cylinders will open when air is applied, and close
through spring tension. The double acting
cylinders will open when air is applied to the
rear of the cylinder and air is exhausted through
the front. The cylinder will close when air
pressure is applied to the front, and air pressure
is exhausted through the rear. (Refer to Drawings
Pages 3-020 thru 3-029)
3-004