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One method of test routine validation is to inspect a bare board. Inspecting a bare board verifies that inspection

threshold settings are not configured too low — a proper indication would be that all parts should fail during

this test. If they do not, then either a threshold is set below the recommended level for that device type. To

correct this type of test error, see: Fine Tuning AOI Mode Inspection Routines.

1. To validate for no false accepts, load a bare board into the scanner tray and run the test developed for

a fully populated PCBA of the same type. As mentioned above, ALL parts should fail during this test

(as illustrated in the figure below).

Bare Board Failed Devices 856 out of 856

2. If any of the devices pass, then review the templates and settings for all “Passed” devices, as these

should have all failed. Use the following resources to correct any false pass condition(s) and re-run the

test until all devices fail.

3. See for reference:

a. Training Alternate Templates.

b. Editing / Deleting Templates.

c. Adjusting Threshold Settings.

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AOpen AOI-702U Spezifikationen Seite 91