Graco HFR Setup page 37

15.
Calibrate HFR
NOTE: Machine is calibrated from the factory. Only per-
form the following steps when changing or rebuilding
pumps.
The HFR calibration procedure is a two step process.
The first step, Learn Mode, must be performed when-
ever the pump line is rebuilt or if any other maintenance
is performed that may affect the mechanical tolerances
in the pump line. If the machine does not appear to be
utilizing the full extent of the pump stroke, or if the
machine appears to be contacting the end of the
hydraulic cylinder, follow the Learn Mode procedure.
The Learn Mode procedure will teach the system the
mechanical limits of travel.
• Learn Mode Procedure:
a. Ensure the dispense valve is set up as either
straight head or straight head prox.
b. Navigate to the Calibration screen.
c. Press .
d. Press and then
the right most extreme position.
e. After the pump stops moving, press
then press . The pump will travel to the left
most extreme position.
f. After the pump stops moving, press
return to the main Calibration screen.
NOTE: During this process, the system learned the
mechanical limits of travel. If the pump did not reach
both the left and right extreme limits for any reason,
repeat the procedure.
3A2797ZAA
. The pump will travel to
and
to
• Set temperatures:
This equipment is used with heated fluid, which can
cause equipment surfaces to become very hot. To
avoid severe burns:
• Do not touch hot fluid or equipment.
• Allow equipment to cool completely before
touching it.
• Wear gloves if fluid temperature exceeds 110°F
(43°C).
For detailed temperature adjustments, including alarm
levels, or upon initial machine configuration, see Condi-
tioning Screen 2 on page 63 for details. For minor
adjustments to the temperature setpoint once the
machine has been initially configured, see the Status
Screen on page 73.
• Set system control and dispense modes: See Sys-
tem Screen 1 on page 59.
• Set pump sizes: See System Screen 1 on page 59.
• Define Shot Recipes
a. Navigate to the Shots screen.
b. Press to enter the screen.
c. Use the directional keypad to navigate to the
shot detail column for the desired shot number.
d. Type the desired setting for that item then
press .
e. Repeat the previous two steps for all desired
shot numbers.
• Change pressure imbalance setting (optional)
The pressure imbalance function detects conditions
that can cause off-ratio dispense, such as loss of feed
pressure/supply, pump seal failure, clogged fluid inlet
filter, or a fluid leak.
The pressure imbalance default is factory-set at 500 psi
(3.5 MPa, 35 bar). For tighter ratio error detection,
select a lower value. For looser detection or to avoid
nuisance alarms, input a higher value.
Setup
37