Down and up looking camera location considerations

[Harjit Singh]

I'm finalizing the layout of my machine and was wondering is there any benefit for the up and down looking cameras to be able to see each other?

In one of the layouts, because the pick up head, and the down looking camera are side by side, the down looking camera cannot get over the up looking camera.

A while back there was a discussion of having a clear sheet with a round shape, and then imaging it with both the top and bottom camera, and doing some calibration.

Thanks in advance.