Operation
3-13
Part 1102771A
E
2010 Nordson Corporation
Powder Flow Settings
Two modes of powder flow control are available:
Smart Flow
-- This is the factory default mode. In this mode, you set Total
Air (powder velocity) and Flow Air % (powder flow) setpoints. The controller
automatically adjusts flow-rate and atomizing air flows to the pump based
on the setpoints. When the controller is configured for Smart Flow mode,
the % and
icons are lit.
Classic Flow
-- This is the standard method of setting powder flow and
velocity, by setting flow air and atomizing air flow separately and balancing
them manually for optimum results. When the controller is configured for
Classic Flow mode, the flow and atomizing air icons are lit.
NOTE:
Refer to
Controller Configuration
on page 3-17 for a list of the mode
defaults and configuration instructions.
Flow Air
Atomizing Air
Flow Air %
Total Air
%
Figure 3-16 Powder Flow Icons
Smart Flow Mode Settings
In Smart Flow mode, Total Flow sets the velocity of the powder flow, while
Flow Air % sets the powder flow rate. Powder velocity is inversely related to
transfer efficiency; the higher the velocity the lower the transfer efficiency.
When making Smart Flow settings, set the Total Flow setpoint first to obtain
the desired pattern size and penetration, then set the Flow Air % setpoint for
the desired powder flow.
Flow Air %:
0--100%. The actual percentage range available varies
depending on the total air setpoint and the maximum and minimum outputs
for flow and atomizing air.
Total Flow
:
2.55--10.2 M
3
/HR, minimum 0.17 M
3
/HR increments, or
1.5--6.0 SCFM, minimum 0.1 SCFM increments.
See Tables 3-1 and 3-2 for examples of possible Smart Flow settings and
their equivalents in Atomizing and Flow-rate Air pressures and flows.
Figure 3-17 shows the effects of changes in Total Flow and Flow Air %
settings.
The Smart Flow tables provide a range of possible Total Flow and Flow Air
% setpoints. Read across to the vertical axis for the equivalent atomizing
air flows and pressures. Read down to the horizontal axis for the equivalent
flow-rate air flows and pressures.
The tables show that as you increase Total Flow powder velocity increases
while the maximum Flow Air % remains the same. Conversely, for a given
Total Flow setting, each increase in Flow Air % increases powder flow.
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