Mix And Integration Tests - Graco XM 24W626 Operation Manual

System Verification

Mix and Integration Tests

Use the following tests to check for proper mix and inte-
gration.
Butterfly Test
At low pressure, normal flow rate, and without a spray
tip installed, dispense a 1/2 in. (12.7 mm) bead of mate-
rial onto foil until multiple changeovers of each metering
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 pres-
sure setting, flow rate, and tip size until multiple change-
overs of each metering 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 test pattern's entire
length at the time listed on the data sheet.
NOTE:
Spots that take longer to cure indicate insufficient inte-
gration.
Appearance Test
Spray material onto metal substrate. Look for variations
in color, gloss, or texture that may indicate improperly
catalyzed material.
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