syncronizing pxi6602

[bigburnsgeoff]

I am using two counters to measure transmission error of two shafts using 36000 line optical encoders. This currently works at low speeds and is not being buffered. I notice that there is some skew between the counters. Hence i would like to make them syncronous and is possibly trigger them. Does anybody have any easy solutions as I am unable to find any appropriate examples.

[Michael_S.]

Hello,

The 6602 counter board has the option to use a start trigger to start the counters operation. A start trigger setup utility can be found in ...LabVIEW 6\examples\daq\counter\ni-tio.llb at the bottom of the library it is called Counter Start Trigger.vi

To make sure that the readings of each counter are taken at the same time you would need to use a buffered operation and use the same gate signal to latch the data into the buffer on both counters at the same time. The start trigger will guarentee that the operations will start at the same time and the gating signal will latch the counters current count into the buffer at the same time. You could use buffered position measurement or buffered event counting for your application.