03-31-2012 06:48 AM
03-31-2012 08:09 AM
Zizo,
To get useful help, you should be more specific about what you want.
How does the laser sensor communicate with the computer?
The USB-6008 has software timed digital outputs which make it poorly suited for controlling a stepper motor except at very low speeds.
What have you tried?
Lynn
03-31-2012 09:54 AM
Lynn,
The sensor will be communicated to the computer analogy through The USB-6008, as the sensor outputs 4 - 20 mA.
What I want to know for now is how to read an external voltage through The USB-6008 and deal with it in LabVIEW?
The USB-600803-31-2012 11:42 AM
Zizo,
The USB-6008 can read analog voltages but not current. Typically the way 4-20 mA signals are handled is to connect the current loop to a 249 ohm resistor and measure the voltage drop across the resistor.
Look at the Examples which come with the DAQ drivers for the USB-6008 as a way to get started.
Lynn
03-31-2012 10:30 PM
Thanks Lynn
I'm getting to be familiar to LabVIEW
04-09-2012 05:03 AM
04-09-2012 03:43 PM
I am not familiar with the BAL-35, but I searched on-line and found a driver with that designation. I noticed that the Logical Signal Current specification calls for 6 to 20 mA. The USB-600x series devices can only drive 8.5 mA. The output high voltage at 8.5 mA is 2.0 to 3.5 V which is well below the 4.5 V minimum Input High voltage required by the BAL-35. Some of the other web sites I found say it is TTL compatible, but the values on that page are NOT really TTL compatible. Since the documents are not clear, it is hard to say what the fix will be.
Do you have any way to measure the actual input requirements?
Lynn
04-10-2012 05:57 AM
04-10-2012 08:27 AM
Look at the Digital Output examples which come with the DAQ drivers. The USB-6008 only has software timed digital outputs, so you will be limited in the choices of examples.
Lynn
09-05-2012 12:03 PM