How to make a FFT graph show imaginary multiple of 1x of the speed in LabView

[amir_aj]

I am using LabView to analyse vibration of a turbocompressor and show it on a FFT graph. What I want the program to do is to automatically draw lines on the X axis of the graph and show the possible 1x, 2x, 3x ... of the vibration according to the speed of the motor. For example if the speed of the motor is 10 kRPM then 1x is 166.6 Hz and 2x will be 333.33 Hz and so on. It is like having grid lines on the x-axes which will move with speed. Is this possible?

I am using LabView 2010.

[Henrik_Volkers]

If you have the sound and vibration suite have a look at the order analyses functions 🙂

one a single fft graph you can simply rescale the axis with the property node (or change the df accordingly)

Attached a quick shot, where I took the dominat frequency as order 1  (I plotted the data twice .. still room for improvement 😉 )

[amir_aj]

Thank you for your reply, May I ask if you can send me the code for version 2010, I can not open it.

[Henrik_Volkers · Accepted solution]

Here we go