System Verification; Mix And Integration Tests; Pump And Metering Test - Graco XM Series Operation

System Verification

Graco recommends running the following tests daily.

Mix and Integration Tests

Use the following tests to check for proper mix and
integration.
Butterfly Test
At low pressure, normal flow rate, and without a spray
tip installed, dispense a 1/2 in. (12.7 mm) bead of
material onto foil until multiple changeovers of each
pump have occurred. Fold the sheet of foil over the fluid
then peel it back and look for unmixed material (appears
marble-like).
Curing Test
Spray a single continuous pattern on foil at typical
pressure setting, flow rate, and tip size until multiple
changeovers of each pump have occurred. Trigger and
de-trigger at typical intervals for the application. Do not
overlap or cross over your spray pattern.
Check curing at various time intervals, listed on the
material data sheet. For example, check for dry to touch
by running your finger along the entire length of the test
pattern at the time listed on the data sheet. NOTE: Spots
that take longer to cure indicate insufficient integration.
Appearance Test
Spray material onto metal substrate. Look for variations
in color, gloss, or texture that may indicate improperly
catalyzed material.

Pump and Metering Test

This test checks the following items and should be run
every time a new job is started, or if there is a suspected
problem.
• Verifies that the pumps installed match the pumps
selected on the Setup screen by dispensing exactly
750 ml of each material.
• Verifies that each pump holds fluid against the pump
inlet valve by stalling on the down stroke.
312359R
• Verifies that each pump holds fluid against the pump
piston valve and packings by stalling on the
upstroke.
• Verifies that each dosing valve holds fluid, and that
there are no external leaks between the pump and
dosing valve.
• Verifies that the recirculation valves (AC, AD) are
closed and do not leak.
• If system ratio mode is set by weight, this test
calibrates the weight ratio.
This test will dispense 750 ml of component A, and then
750 ml of component B. Dispense into separate cups so
the fluid can be returned to the supply tanks.
During each dispense the flow will stop once to stall the
upstroke, once to stall the downstroke, and then it will
finish the dispense. Do not close the sampling valve
until the third flow stops and the blue pump light (DK)
goes out.
1. Enter the Test Screens (see page 86).
2. Select to run pump test.
If the system ratio mode is by volume, either
volumes or weights can be measured.
Press to select this.
volume, which is standard on XM systems.
System Verification
represents
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