Graco HFRL, Руководство по установке и эксплуатации

Страница: 74 / 142

Appendix B - ADM Setup Screens Overview
74 3A2175Z
• Auto Pressurize After Circulation - If turned ON,
the HFR will automatically stall to the last dispense
pressure monitored after commanded out of circu -
lation mode (“ ” key off). This will enable the next
dispense out of the dispense valve to start at the
correct dispense pressure. Since P2/Fusion DV
type HFR will stall to pressure by pressing the
green dispense key, this option is disabled if the
dispense valve option is selected.
• Maximum Circulation Pressure - The user can
configure the system to generate a warning (devia -
tion) if any of the two pump pressures exceed the
entered amount while in circulation. If excessive
pressure exists, a “High Circulation Pressure” devi -
ation will be generated and logged for the user. If
this feature is NOT desired, enter a large pressure
value.
• Tap to High Pressure Recirculation - This feature,
if checked (default is NOT checked), will command
the HFR to interpret a footswitch tap as a go to high
pressure recirculation mode, but will NOT dispense
material (same as pressing the “ ” key on the
main run screen). This feature only applies to full
recirculation systems (S-Head, S-Head with Prox,
and L-Head dispense valve options), and is dis -
abled if the system is NOT a full recirculation sys -
tem.
• Auto Circulate Between Dispenses - This feature
is only available if the HFR Recirculation Valves
Installed option is checked, the system is NOT a full
recirculation system, and the system does NOT
have a manually controlled dispense valve
(Fusion/P2 option). If this feature is checked, the
system will automatically start recirculating the
material between active dispenses out of the dis -
pense valve. This function is typically used to con -
dition the material between dispenses and can be
used with the HFR footswitch input. If the
footswitch is active (pressed), the machine will dis -
pense material. To terminate the recirculation pro -
cess and prevent the start of a dispense, press the
“ ” key on the main run screen.
• Controlling/Stall Pump - Use this feature to select
the controlling pump (constant pressure mode) or
stall pump (at the end of constant flow or constant
pressure, non-circulation dispense). Four selec -
tions are available; “Auto” (default configuration,
where the logic will select the larger pump, or the
blue pump if both pump sizes are equal), “Red,”
“Blue” or the “Higher Pressure” pump. If the
“Higher Pressure” option is selected, the logic will
control to the pump with has higher pressure if the
difference between pressures exceeds approxi -
mately 2.5 bar. This control is disabled for full circu -
lation systems since it is not relevant. This control
entry is also used when the HFR “Auto Circulate
Between Dispenses” and “Pressurize Before Open -
ing DV” features are active. Refer to the “Pressurize
Before Opening DV” explanation for details.
• Maximum DV Response - This allows the user to
determine the maximum response time for opening
and closing the dispense valve at the start and end
of a stall to pressure type dispense. This control is
disabled for full circulation and manually controlled
dispense valve applications (S-Head, S-Head with
Prox, L-Head & P2/Fusion DV options). Values from
10 to 330 milliseconds are permitted. If the
response time for a particular valve is very slow,
enter a larger number. If performing short, rapid fire
or bead type dispenses, enter a small number and
mount the dispense valve solenoid next to the valve
and install short pneumatic lines to the valve. A
default value of 125 milliseconds will be used if no
value is entered.
• Minimum Stall to Pressure % - This allows the
user to determine the pressure set point at the end
of a stall to pressure dispense. For example, if the
system is dispensing at 50 g/s and the logic mea -
sures 70 bar at the requested flow, an entry of 50%
will command the logic to stall at 35 bar when the
dispense is complete (70 bar x 0.5 = 35 bar). A
default percentage of 97 is selected if the entry is
not modified by the user. This control entry is also
used when the HFR “Auto Circulate Between Dis -
penses” and “Pressurize Before Opening DV” fea -
tures are active. Refer to the “Pressurize Before
Opening DV” explanation for details.