*I'm using the 3530 encoder and it is wired to a 1047http://www.phidgets.com/products.php?category=7&product_id=3530_0 http://www.phidgets.com/products.php?category=7&product_id=1047_1
We started by taking the diameter of the roller (2.246 in), that the encoder is attached to, and using that to find the circumference. It was 0.588 ft/revolution. We took 4*360 to get the 1440 pulses/revolution. Then I took the time output and divided by 1000 to get from ms to s and then divided again by 60 to get to min. All of this math gave us a conversion factor of 24.5, which is the number you see in the VI velocity conversion VI. We are trying to get our output velocity in ft/min.
Here's our math:
Velocity= Circumference = 0.588 ft/rev = 0.588 * 1000 * 60 = 24.5
(pulses/rev)(Δt) (4*360 pulses/rev)((1/1000)*(1/60)) 1440
It just isn't giving anything that looks like a velocity recording, let alone the proper velocity. I don't know if it's my code or if I'm just not reading the right outputs from the phidget itself.