Smart Gui - Algorithm Training Material_rev1.pdf - 第133页

Copyright © ViT rox All Rights Reserved . Lead Ringer - T ypes of Ringer T ests 4. T oe Sticks Out Gap • Anchor set to (Lead T ip anchor) • Image Plane: Angle 1 • Software measure the mean intensity of the pixels contain…

Lead Ringer - Types of Ringer Tests

3. Shoulder Bend Differs

• Anchor set to (Shoulder anchor)

• Image Plane: Angle 1

• Software measure the mean intensity of the pixels contained within the ROI.Compare each lead with its

neighbours (per row comparison), with invert check (invert the results if most of the leads of the row are defects).

• Inspection area: Shoulder Area

• If the lead is lifted (heavily) or bent, the lead will be visibly deformed: the shoulder will appear brighter in the

current region of interest.

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Lead Ringer - Types of Ringer Tests

4. Toe Sticks Out Gap

• Anchor set to (Lead Tip anchor)

• Image Plane: Angle 1

• Software measure the mean intensity of the pixels contained within the ROI.Compare each lead to a preset

threshold.

• Inspection area: Lead Tip Area

• If the lead is bent, then the lead tip will move forward, making the region of interest appear brighter.

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Lead Ringer - Types of Ringer Tests

5. Toe Finish Melt Differs

• Anchor set to (Lead Tip anchor)

• Image Plane: Angle 3

• Software measure the mean intensity of the pixels contained within the 2 ROI.compare each lead with its

neighbours (per row comparison), with invert check (invert the results if most of the leads of the row are defects).

• Inspection area: Lead Tip Area

• When the board is reflowed, the heat might melt the solder on the side of the lead toe, which will not happen if

the lead is not connected to the solder, i.e. lifted.

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