Color Change Manifold - Nordson Encore HD Powder Spray System with Prodigy Color-on-Demand Customer Product Manual

2-8
Description
The color control panel houses the PLC and solenoid valves that control the
color change system. The PLC also interfaces with the pump control
boards in the pump control panel to signal a color change start.
The Color-on-Demand controller provides the operator interface for the
color change controls. The controller communicates with the color control
panel through an Ethernet cable.
Power is supplied to the COD controller from the color control panel through
a separate power cable.
Other major components of the color control panel include the manifold
purge valves, which provide manifold purge air during the color change
cycle; the system pressure switch, which senses system air pressure and
prevents a color change from starting if the air pressure drops below 70 psi;
and the foot pedal pressure switches. When the operator steps on the foot
pedal, it sends a signal to the pressure switch, which signals the PLC to
initiate a color change.

Color Change Manifold

See Figure 2-6. The color change manifold consists of 3 valve blocks with
10 ports in the side of each block and ports at each end. Of the 30 side
ports, 28 are powder inlet valves and one is a purge air inlet valve. A
separate external dump valve is connected to the top outlet on the top
block.
The manifold valve bladders are inflated to close the side ports and deflated
to open them. The currently selected powder flows around the valve
bladder and out the suction line to the HDLV pump. During a color change,
air is exhausted from the Dump 2 valve, allowing them to open so that
purge air can push the remaining powder in the suction lines and manifold
out through the dump lines to the booth.
Color change cycle settings are made from the Manual Gun Controller
interface (Tools>Purge). These settings determine the pump soft purge,
pulse purge, and new color pre-load timing.
Both gun controllers must be set for the "Gun No: 1" network address.
Refer to the Encore HD Manual Powder Spray System Controller manual
(part number1604869) for a description of the color change cycle and
settings.
Part 1605396-04 E 2018 Nordson Corporation