Rick Yahn

Greetings LabView'ers: I'm having problems generating a repetitive, reliable, timing pulse that is x-number of A-pulses delayed after the Z-pulse of an encoder. I have attached the vi tried so far but I can't seem to reliably adjust the position of the output pulse after starting the vi, nor is this vi using a known ref point (Z-pulse). I need to be able to create a "phasing control" on the front panel for a user to vary an output pulse of a counter. This needs to be done throughout the 2048 pulses-per-rev of my encoder. In other words, I want to output a repetitive trigger pulse for use by another device at always count "x" (1 to 2048) of an encoder input controlling "x" through a front panel control. My application is to trigger a camera at a specific encoder tick count after seeing a top-dead-center (Z-pulse) of an encoder to snap pictures at a precise location (tick count) every rev of the encoder. This needs to be done through hardware for accurate timing of the trigger pulse from the counter to my camera, and not done through Windows and vi loops. I have a M-series multifunction daq bd, NI-6220, with only two counters available. I am running LabView 7.1. Thanks much in advance for your ideas! Rick Download File:post-5840-1164133237.vi