solerpwr07

I have setup a calibrated LVDT using the DAQ assist. Simple enough feature in my code: signal comes straight from the DAQ assistant, is subject to calibration math functions, and then out put to a numeric indicator. I want to be able to zero the LVDT when a button on the front panel is pressed. So say the lvdtis reading at a displacement already, I want that value to be zero and and any further displacement will be relative to that point. what a simple way of accomplishing this, unfortunately Im still learning trial by error with labview.

QUOTE (Yair @ Aug 6 2008, 02:02 PM)

The support thread for the CR submission should have the VIs in 7.1.

sure enough, it's there. thank you

not i got to figure out how to use it

ill look at the power point hes got there

QUOTE (crelf @ Aug 6 2008, 12:10 AM)

Have you checked out Norm's http://forums.lavag.org/Tree-Control-API-file71.html' target="_blank">Tree Control API? It might be just what you're looking for...

PS: Please please please change the colour of the BD back to white

haha thanks i will remember that for the nxt time.

I cant get the tree control unless norm sends me the 7.1 version. PM sent and hopefully that happens

If it doesnt work out, any other suggestions?

hey all

I didn't write this code but I am now in charge of modifying. (you all know how that goes). I don't have too much experience with labview, but enough to understand.

What i need to do is replace the current method of entering 'loads' and 'rev triggers' in a way that is easier to use. I'd like to replace the 2 circled controls with 2 Tables, and have the user enter in loads into top row (or column) and revolutions at which the load occurs into the bottem row. There will need to be 2 tables(?) since there are two independent sides to this test rig.

I gave it go with no luck so i was just wondering if there was any help to be offered.

(using labview 7.1)

Thank you

Hope all had a good holiday and long weekend.

ive put up the area of code where it displays the loads put on each of the different (8) test specimens. can the change in load be carried out directly from (after) the doubles; replace the area where you all generated data? i know there is a space issue, but that can be taken care of.

QUOTE (mross @ Jul 3 2008, 09:03 AM)

Welcome single poster,

Maybe I am paranoid, but this sounds like class work. You should be showing us what you have done (attach code or screen dumps of the block diagram) to encourage us that you are doing real work rather than trying to get a leg up on your classmates.

I will give you a hint though. You need to understand and use shift regsiters on your loop structures. Then you must understand how to feed more than one plot to a chart or graph. All the information you need to do these things is part of the regular help and example code of LabVIEW. There are also a comprehensive knowledge bases that you should learn to use at ni.com.

Best regards,

Mike

I appreciate the help mike. This isn't class work, it is code for an double slid ACTR (track roller) test machine. I did not write the (rather large amount of) code for it since its been in use long before i entered the company but i have been asked to modify it. I apologize that i can not post the code for our test rig. However, thank you for the direction. Anything else would be greatly appreciated

I have a chart that displays my load and indicators stating the current load values from test lab equipment. I've been asked to have my program also display ramp loading, so basically i have to chart the rate of change of the load. Can I some how graph the rate of change, or difference between a value and it's previous value?