AOpen AOI-702U Spezifikationen PDF herunterladen (Seite 133)

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It is important to have a good working knowledge of device positions used by the AOI Mode software.

CentroidPosition

By definition, the centre of the Device Outline is the Device’s centroid position. A small purple colored cross or

dot marks the centroid position. This is the center XY reference position of a Device. All other device-related

operations are relative to this centroid position. The centroid position is initially identified by the CAD data. The

user can change the Device’s centroid position by changing its Device Outline. Before any Device update

operation, it is important to make sure the centroid is precisely at the centre of the Device.

TrainedPosition

Each alternate template has its position. The alternates do not need to be at the centre if of the Device. Each

solder area or lead area has its position. Trained positions are derived during the definition of the Device and

the adding of its components.

The trained position of a template is only displayed when the Edit Alternative dialog box is shown. Since the

dialog box would appear in the middle of the screen, it may biscuit the display of the trained positions. The user

can move the dialog box aside to view the trained position being displayed.

The Trained Position of a template is where the machine expects that template to be found. The Trained

position of a lead area is where the machine expects the lead to be.

During a Device update the relative positions from the centroid to all the various trained positions are being

updated.

FoundPosition

The Found Position of a template is where the machine actually located the template. Found Position is only

available after an inspection has completed. This is why the green boxes appear to “lock on” to the Device

after an inspection. The found position highlight box may have an offset from the actual Trained Position.

When a Device fails an inspection, the red boxes do not usually “lock on” to the failed Device. Instead, the

offset highlight box appears where the device search has stopped looking within the boundaries of the defined

Search Region.

Found Device Position Failed to Find Device Position

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AOpen AOI-702U Spezifikationen Seite 133