Mr CCE

Hi everyone, @ mesmith: Thanks very much for the great help I completed it yesterday and it's working perfectly. - To be honest I tried doing it in a while loop before I resorted to the sequence structure but strange things happened and the readings from both POT's made very little sense so I thought I was doing it wrong. so all new LV'ers do that? LOL so I guess I'm on the right track then! - As U may have guessed it, I'm doing a project that includes position control where each of the variable resistors specify a position for a DC-Geared Motor and I' ve already added two additional POT's to act as feedback. The idea is that I want to apply PID theory but I'm not sure how exactly in LabVIEW. I heard there's a PID toolset but I don't know how to get it: Is it downloadable from "ni.com" ? - Last but not least I need your advice everyone on how to achieve this 'cause I already did it with a PIC but not quite sure how with LabVIEW. Best regards

Hello everyone, First I want to thank you for your help. I' ve been working on it and here's what happened so far: - @ Hooovahh: About MAX yes I have it and I used it before I got the DAQ USB 6008 just to create a virtual DAQ and perform some tests and try out the different functions of DAQmx. And no, I was not using it when I ran my VI. As to the Express VI's with respect to DAQmx's, I'm starting not to like them either! I replaced the Express VI's with DAQmx functions such as "create task/ start/ clear / stop" ... etc Also I want to thank you for the other tips they were very useful. I tried some NI examples and not all of them are compatible with DAQ USB 6008 ( compatible with other DAQ modules). - @ mesmith: It's exactly what I suspected the two express VI's are fighting over the DAQ resources. But as for your revised VI I couldn't open it, you see I'm using LabVIEW 7.1 and you're using version 10 so I got the message below. Actually I was able to somehow bypass the problem and so far it's working. You know what I did? I created a flat sequence structure and placed each acquisition operation in a separate frame! Anyways I've just started and the project is not yet complete so I'm gonna need your help everyone and thanks very much for the help so far. Regards

Hello everyone, I'm a new Labview user and I'm currently working with DAQ USB 6008 to acquire a couple of analog inputs which are actually readings from variable resistors. I'm Using NI-DAQmx 7.5 with LabVIEW 7.1. For this purpose I'm using a DAQ Assistant for each input and for each I' ve chosen Analog Input >> Voltage >> .. with single ended connection and acquisition of Single Sample ( On Demand ). The problem is, everytime I run the VI an error occurs " The specified Resource is not available". Forgive me for this sort of question but you see, I'm a beginner and I really appreciate any help I can get from professionals like you guys. I've attached my *.VI file plus two picture showing how I connected the two potentiometers/ variable resistors to the DAQ and the error that I received. Thanks very much in advance. Best Regards Two Analog In.vi