Precharge Modes - Graco PCF Instructions - Parts Manual

Precharge Modes

NOTE: See the diagram on the following page.
Static Precharge Mode
Display
When Display precharge mode is selected, a static pre-
charge pressure can be defined. When a job is active
and all dispense valves are closed, the regulator will
maintain the defined precharge pressure.
Dynamic Precharge Mode
Dynamic precharge control allows the system to better
prepare for the upcoming dispense. The pressure/flow
command is used to actively set the outlet pressure to
the ideal pressure while all dispense valves are closed
and provide a boost while the valve is opening to help
accelerate material.
The "Closed" scaling will be applied when all dispense
valves are closed and the "Opening" scaling will be
applied immediately after a dispense valve starts to
open and continue for the user-specified duration (in
milliseconds). The precharge scaling values modify the
control signals that are necessary to obtain the desired
pressure/flow. The precharge pressure can be changed
dynamically throughout the job by varying the pres-
sure/flow command value.
313377L
Valve 1
When the "Valve 1" precharge mode is selected, the
outlet pressure will be set according to the current pres-
sure/flow command using Valve 1 scaling values.
Operation
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