Graco PR70 Machine Calibration Shots C4, Open Dispense Valve ODV Screen C3 Key

Priming and Calibration

From the Run screen, press , then press , then press 3 times. The following screen will be displayed.

Figure 13: Open Dispense Valve (ODV) Screen (C3)

Key:

ACurrent ODV Adjustment (in mm from the cylinder entrance).

BAdjust ODV value Option ICON.

CRelative ODV Position ICON with respect to cylinder entrance (This ICON will move right or left at +/- mm transition).

DCylinder Entrance ICON (stationary).

IScreen 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 to decrease the value. Values of – 5.0 mm to + 5.0 mm are allowed.

3.Press to accept the value or to retain the 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 (“”) and several 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.

Figure 14: Stroke Calibration (CAL) Screen (C4)

Key:

AShort Shot Column ICON

BLast/Current Short Shot weight (mass) entry.

CLong Shot Column ICON

DLast/Current Long Shot weight (mass) entry.

EGrams (Weight or Mass unit used)

FShort Shot ICON

GLong Shot ICON

IScreen 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 (“”). Press 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.

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