controlling pulses for triggering thyristor

[gusphol123]

Im new to Labview. Using Labview 8.0 at college. What I am doing is trying to generate and control pulses being sent to the gate of a Thyristor. I am inputting a rectified voltage, reading every zero point on this input voltage and I want to use this to synchronise the output pulse. I want to be able to vary this output pulse so as to use it in a phase angle control circuit. WIthin the 10 milliseconds between zero points I want to be able to control and vary the output pulse until it see the next zero point.

Ive been going around in circles trying to get this, so any ideas or help with how i can achieve this would be greatly appreciated.

[Coq_Rouge]

I will say it is on the edge. Since Labview is not made for realtime applications. Using a timed loop running at max speed 1KHz. And single point acquisition. You  can see what you can do. Use real Labview code, and stay away from Express VIs is my advice to you. In this case