Encoder velocity + min and max of velocity

[spartakchamp]

Hello!

I use incremental encoder and PCI-6220 card. I need to measure angular position and angular velocity of shaft (rotation angle of shaft is from -80 to + 80 degrees (there is no complete revolution). For measuring angular position I am using DAQ Assistant (encoder is for position measurement) (see attached file LabView 7). But I do not know how to measure angular velocity of shaft and also maximum and minimum values of velocity (of course minimum value of velocity have to be zero, because rotation is clockwise and counterclockwise)

Sergey

[spartakchamp]

My attachment

[Elizabeth_S]

Spartakchamp,

Since you have the angular position and timing information, you can calculate the angular velocity within LabVIEW:

w = dq / dt.