pulse train from encoder

Hi,

I am attempting to generate a pulse train to trigger a camera using an X4 quadrature encoder with A, B and Z index, the Ni 9401 and the NI 9172 chassis. My encoder generates 2500 pulses per revolution but I need a pulse train of 5 pulses every revolution to capture 5 images evenly spaced on my rotor. I want to capture these five locations for every revolution. Any help would be greatly appreciated