Synchronizing cameras with encoder and I/O expansion board

[govindc]

Hello, 

I am trying to acquire simultaneous images from two identical camera link line scan JAI cameras via two NI 1433 boards. Both the cameras are getting their trigger signals from a quadrature wheel encoder.

I am noticing the frame read from the two cameras are not in sync with one camera's frame rate always higher than the other.

Camera 1's frame-grabber board is also getting the encoder's quadrature input via an I/O expansion board. Camera 2, however, does not have an I/O expansion board associated with it. I am keeping track of the frame count from each camera using the pulses out of the smb pin on the frame grabber.

A few of questions on this:

1) Is this a right approach for synchronizing multiple cameras?

2) Do I need another I/O expansion board for the second camera?

3) Is there a way a single I/O expansion board can connect to multiple frame grabbers?

thanks!

[WireWeaver]

You may have better luck posting this on the Machine Vision board. There may be some users here that can answer this, but the majority of the expertise on this board is LabWindows/CVI. I'm not personally familiar with that card.

Have a good one,

Trent

[govindc]

Thank you WireWeaver! I'll try this on Machine Vision board then.