How I use 2 AI with 1 AO in the same program without hardware errors?

I have a machine with a Motor (velocity controled with PWM), a Strain Gauge, and a Encoder (inner the motor). This machine is controled with a LabVIEW 6.1 program in a computer with Intel Celeron 1.5Gb 360 Mb RAM and DAQ 6024E.
In my program I have two AI Adquisition Waveform blocks with AI different ranged Channel (the firts in my Strain Gauge ranged -9 to +9 V) and the second in my encoder ranged 0 to +5 V), and one AO Generate Waveform (the PWM signal ranged 0 to +5 V). When I put on the program, the motor Glitches an my computer turns slow. It´s cause me problems!
Whats the problem?

You would probably get more info on this in the DAQ Discussion Forums, but I can help you out a bit here. The VIs that you are using are very high level VIs so there is a lot going on behind the scenes that you do not see. More importantly, they are synchronous, meaning that you have to wait until they're finished to do anything else. This is probably why your computer is slowing down. The UI may even freeze until you have acquired all the points you requested. I would suggest using the more advanced DAQ VIs to control your system. There are many examples that ship with LabVIEW which demonstrate how to use these. They allow you to build an asynchronous acquisition system so that other tasks may operate while the DAQ board is acquiring data.
J.R. Allen

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