11-15-2012 10:55 AM
A little overview, we are trying to measure torque on the output shaft of a motor using a USB6212 DAQ.
To do this, we are using the voltage feedback between channels ai1 and aiGND. Basically the readings I get when I measure with a multimeter do not match the output I am getting in Max.
Am i measuring the wrong terminals? Doesn't RSE on ai1 use aiGND as it's ground?
Additional Info:
I also have a spare 6212 board which displayed the same problem.
I don’t believe the executable uses any custom scaling because it matches exactly what I see in max when I plot ai1 in RSE mode.
Thanks,
11-16-2012 05:06 PM
Hi sozdemir,
I have a few questions for you regarding your application:
What do you observe if you try hooking up your voltage input as differential? Remember when you do this to change the input configuration to differential in MAX as well as changing the pins on your device.
Is your exe just running the motor, or are you using DAQmx tasks to acquire voltage with your USB 6212 as well?
Are you measuring any other analog inputs on your device, or just the torque?
Have a great weekend!
11-16-2012 05:08 PM
Thank you for the response. We believe we had the wrong wiring hook up and it's similar to what you are saying in your response. We had something hooked up to ground that should not have been.