Graco PCF Instructions And Parts page 91

Dispense Control Modes
The PCF system has four fluid dispensing control
modes.
• Bead Control – the control unit measures the flow
rate of the material being dispensed. The regulator
outlet pressure is varied to control the fluid flow rate
to the requested value. Use the bead control when a
consistent bead size is required.
• Shot Control – the regulator outlet pressure is con-
trolled to the requested value. The dispense valve is
closed when the target volume is reached or when
the automation controller provides a signal.
• Pressure Control – the regulator outlet pressure is
controlled to the requested value. Use the pressure
control mode if the system does not include a flow
meter.
• Full Open Control – the PCF system does not con-
trol fluid pressure or flow. Instead the regulator
opens to allow for recirculation applications.
Maintenance Mode
Press from the dispense control mode screen to
enter maintenance mode. Maintenance mode enables
users to change the control mode, volume to be dis-
pensed, target pressure, and number of dispense valves
used in the system.
NOTE: Volume, pressure, and dispense valve
options change according to mode.
See Maintenance Mode Operation, page 37, for
instructions on changing the control mode, target pres-
sure, and number of dispense valves used.
313377B
Appendix A - User Interface Display
Home Screen 2 - Control Center
NOTE: Users must be out of maintenance mode in
home screen 1 to scroll to home screen 2.
This screen enables users to view and monitor the cur-
rent status of the robot outputs and inputs. An X is dis-
played in the check boxes if the robot is using a style
strobe, when the dispense completes, for each dispense
trigger used, when the dispenser is ready, when the dis-
pense is in process, if there are no alarms or errors, and
when the dispense volume is correct.
This screen also displays the current dispense style,
command voltage, current number of errors or error
number, and the amount of volume dispensed.
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