Machine Calibration Shots (C4) - Graco PR70 Series Operation And Maintenance Manual

Priming and Calibration
Figure 13: Open Dispense Valve (ODV) Screen (C3)
Key:
A Current ODV Adjustment (in mm from the cylinder
entrance).
B Adjust ODV value Option ICON.
C Relative ODV Position ICON with respect to
cylinder entrance (This ICON will move right or
left at +/- mm transition).
D Cylinder Entrance ICON (stationary).
I Screen Number (C3)
J & keys will navigate to adjacent screens.
1. To adjust the ODV position with respect to the
cylinder entrance, press
2. Press to increase the value or
the value. Values of – 5.0 mm to + 5.0 mm are
allowed.
3. Press to accept the value or
previous value. The default value from the factory
is – 1.0 mm.
4. Press twice to return to the Run screen.

Machine Calibration Shots (C4)

Read all manufacturer's warning and material MSDS to know the
specific hazards of the material used.
Calibration shots are necessary to program the
machine to properly dispense the correct amount of
material. Several short CAL shots ("
long CAL shots (" ") are required.
Remove the ratio check nozzle, install the static mixer
intended to be used, and adjust the air pressure to the
level intended for use during normal operation.
The air pressure must be set to operating
conditions for this step. Significant changes
in air pressure could adversely affect shot
accuracy.
312393C
.
to decrease
to retain the
") and several
From the Run screen, press
3 times. The following screen will be displayed.
Figure 14: Stroke Calibration (CAL) Screen (C4)
Key:
A Short Shot Column ICON
B Last/Current Short Shot weight (mass) entry.
C Long Shot Column ICON
Last/Current Long Shot weight (mass) entry.
D
E Grams (Weight or Mass unit used)
F Short Shot ICON
G Long Shot ICON
I Screen Number (C4)
J & keys will navigate to adjacent screens.
1. Press to arm the machine to take a short CAL
shots. The icon will be highlighted ("
to de-arm the machine.
2. Place the empty container below the static mixer,
and press (green) or the footswitch.
3. Press and discard the contents of the material
dispensed
4. Repeat the previous 2 steps until the static mixer is
filled with material. Verify the material dispensed
from the mixer is mixed properly.
5. Place a container on a scale and tare (zero) it.
6. Place the tared container below the static mixer,
and press (green) or the footswitch.
7. Press to erase existing average weight data.
8. Place the container with the dispensed material on
the tared scale.
9. Enter the mass in grams into the HMI, by pressing
or accordingly.
10. Press to accept the number. The number
entered will be transferred to the right of the
average icon (" ").
11. Repeat steps 5 through 10, skipping step 7, several
times. Each additional shot weight will be averaged
in the row with the previous shots.
, then press , then press
"). Press
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