Matrix Trays

I usually like to have all the trays use pin 1 in a certain direction. In other words, as you are on the operating side of the machine, all the pin 1's should be on the lower left of the tray. With operators, the KISS principle seems to be necessary.

Another solution that we have used over the years is to have a change log of feeders on the machines. This is to have one person do the change, and then another to verify that it was done properly. Even though this adds time to quick change operations, it does save a ton of rework time.

Most matrix trays that I have dealt with usually are symmetric, so unsure of any way to make a 'key' for them to sit on, or, to have a vision system check for the pin 1. I will be honest, my experience with trays has been limited to a MyData and MPAV (Panasonic).

I hope that these offer some points to ponder, and I'm sure you will receive other responses from much more knowledgable people willing to share!

Dan

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Three strikes and they are fired! Most effective method to keep them awake

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Some machines can check for polarity while doing vision inspection. Although this will differ from component to component, it is a thought to consider.

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Post a simple CAD picture of a BGA or IC on the door of the machine near where it gets loaded. This has helped us. Flash IC's can also be difficult as you can't always put pin one near front, left of tray slot. So... we always say pin one left no matter if it is on the front or rear of the slot.

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