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# How do I determine the optimum parameters for the Burst trigger type?

Since a Burst trigger is ideal for moving applications, it is necessary to determine the correct burst size and interval in order to capture the desired length of the part as it moves under the camera. Once the interval time is determined, you can adjust the size of the burst depending on the length of the part. The variables necessary for this calculation are:

1. Line speed in mm per second

2. Code size w/quiet zone in mm

3. FOV = Field of View (x or y) in mm

You can then use the following equation to determine the interval time:

Interval Time = 1000 * ((FOV – 2(Code Size)) / Line Speed)

Once the interval time is determined, the size of the burst can be adjusted depending on the length of the code to capture. The max object length in mm is:

Burst Size * (FOV – (2*Code Size))

The (2 * Code Size) variable allows for overlap of the frames taken. This takes into consideration the condition where the code is slightly out of the field of view in one frame (acquisition). The (2 * Code Size) will overlap the field of view between successive frames and allow the code to be viewed in the field of view of the next frame.

Note: DM050,DM060,DM070,DM150,DM260,DM300,DM360, DM370, DM470, DM503