Solution to Misaligned Component

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Hi. New Process Engineer asking questions again. The connec... - Jan 06, 2023 by teterettere

The reasons could be: -The pads size are uneven. Modify the ... - Jan 09, 2023 by DucHoang

Can you view the vision system screen where it recognizes th... - Jan 09, 2023 by Stephen

teterettere

#88807

Solution to Misaligned Component | 6 January, 2023

Hi. New Process Engineer asking questions again.

The connector to this model has always been misaligned. Random board on the panel, and the y-offset could be positive or negative with no apparent trend. Images attached.

This is a potential suggested solution given externally, which is to change the part detection method to odd-shape detection. This is on NPM-WX. Images attached.

So question is: Why is this detection method preferred?

Additional Question: Assuming the nozzle was fine and this is pre-reflow, what are your other suspicions about the cause?

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DucHoang

#88820

Solution to Misaligned Component | 9 January, 2023

The reasons could be: -The pads size are uneven. Modify the pads size. -The part has not enough time for self-centering. Check and increase TAL. -Solderpaste not melted completely. Increase peak temp. -Solderpaste does not work well. Use alternate solderpaste. Hope these will help.

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Stephen

#88822

Solution to Misaligned Component | 9 January, 2023

Can you view the vision system screen where it recognizes the part? It should show the picture of the part as the camera sees it and show x's where it detects the features it is looking for. Some parts can show up strange on cameras. It might be having a difficult time picking out leads not extending past the part. Maybe the leads don't reflect light consistently to the camera and appear dark or the body has shiny spots.

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