I have an Labview 5.0 application that moves a servo motor from 0 - 45 degrees while collecting force data. This test collects about 60 data points (normal operation). The data is dumped into a spreadsheet. The problem is: In about 5 % of the runs, there are only about 50 data points. When looking at the data some of the data points are simply missing. Other than the data being missing, the data points that are there are the expected force values.
From what I can tell (this is program written by someone no longer at the company) the motor does a vector move using the rotation and velocity. While the motor is rotating, the data is acquired at about 10 hertz.. When the data is "normal" the spreadsheet data has the rows increment at 0.75 degree intervals. Whe the data is "dropped", there are increments of 1.7 to 3.4 degrees. (Please excuse me if I am using the term "vector move " incorrectly,)
The system is about 7 years old and I was pulled in recently, so I don't have much hands on experience running the tests or the VI. (The symptom was described as "the data looks funny".) I am told this is a recent phenomenom, but I no long term data that supports this theory.
Has anyone had experience where the data acqiusition is intermittent?
Would I be better off creating a new VI that :
Does not use a vector move. Instead, generates the specific stepper motor position (every .25 degrees?) . The resulting data will have the force data for every motor increment.
Thanks for your help.
