Machine Priming; Machine Calibration; Piston Position Calibration (C1) - Graco PR70 Series Operation And Maintenance Manual

Priming and Calibration

Machine Priming

Before the machine can be properly calibrated with
material, it will need to be primed.
Read all manufacturer's warning and material MSDS to know the
specific hazards of the material used.
From the Run Screen press
following screen will be displayed.
Figure 10: Maintenance Screen for Priming (M1)
Key:
A Full Retract ICON
B Full Extend ICON
C Change Dispense Valve Mode
= Always Open
= Always Closed
= Opens at Cylinder Entrance (Automatic)
D Current Piston Position
E Current Dispense Valve Mode
F Screen Number (C1)
G & keys will navigate to adjacent screens.
1. Place a waste container under the dispense valve
to capture any dispensed material.
2. Press until the upper ICON is
3. Press to extend the piston fully.
4. Press to retract the piston fully.
5. Repeat steps 3 and 4 until both materials dispense
from the valve without air.
6. Press twice to return to the Run screen.

Machine Calibration

Before the machine will accurately dispense, it must
be calibrated.
312393C
then press . The
.
Be careful not to pinch fingers when manually moving the machine
drive block.

Piston Position Calibration (C1)

This step should be executed the 1
is setup, and may not need to be re-executed unless
the position sensor, an electronic component or a piston
has been replaced.
From the Run Screen press
following screen will be displayed.
Figure 11: Piston Position Calibration Screen (C1)
Key:
A Full Extend position number from last calibration
B Full Extend Command ICON
C Full Retract position number from last calibration
D Full Retract Command ICON
E Cylinder Entrance position from last calibration
F Cylinder Entrance Command ICON
H Current Piston Position Field
I Screen Number (C1)
J & keys will navigate to adjacent screens.
1. Place a waste container under the dispense valve
to capture any dispensed material.
2. With air pressure applied to the machine, press
3. The piston should fully extend and a number
between 3600 to 3900 should appear for 'H'
4. Press to accept the number or
current number.
5. Press .
6. The piston should fully retract and a number
between 200 to 400 should appear for 'H'
7. Press to accept the number or
current number.
8. Decrease the air pressure by adjusting the machine
air pressure regulator to a minimal value (i.e. ~ 10 -
20 psi).
9. Press .
st
time the machine
then press . The
.
to keep the
to keep the
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