ASTDan

We just had a good presentation on Xcontrols at our user group meeting.

http://decibel.ni.com/content/groups/south...?view=documents

The main problem you have is once the VI is stopped you can only run it again from the LabVIEW run button. You might want to rearchtiect your program so it is not dependant on someone pressing the run button.

I like to add a Start and a Stop button for my applications that need that functionality. I hide the run button from my users. In my applications the VI's are always "running".

There are many ways to do this the simplest is to use a state machine architecture

http://zone.ni.com/devzone/cda/tut/p/id/3024

I like to create a "Wait for user" state that contains an event structure that monitors the UI. Based on what happens in the UI, the wait for user state fires the appropriate case. The only catch is you will have to poll the stop button when in a "running" state.

There are architectures that are more versatile. I like this one.

http://zone.ni.com/devzone/cda/tut/p/id/3023.

Check out this presentation for more information on state machines

http://decibel.ni.com/content/docs/DOC-2724

Hello,

I have been developing a Requirements gathering form to give to customers when working on a new project. My goal is to make sure I ask all the relevant questions so I can develop a prototype UI, specification document, and verify the sensors, hardware, etc is capible of doing what my customer wants.

I developed it in MS Infopath, but I don't think that is a good method to distribute to folks (I don't think everyone has infopath).

So my first question does anyone have a requirements gathering form they are willing to share? If not is there a reference you would recommend?

How do you distribute your requirements gathering form (i.e. Word, PDF, HTML, etc).

Any comments/tips on requirements gathering forms?

Thanks

Dan

QUOTE

Could you create a picture control, display the text you want and superimpose on your column header? That looks more and more like Bob's suggestion to Chris!

I have also Posted on NI discussion forum

http://forums.ni.com/ni/board/message?boar...=389325#M389325

I still can't insert phi into LabVIEW so I have to download the posted VI, and copy and paste phi into a free label into my LabVIEW. I can then super impose the free label in the column header.

Ugly but it works

That would work but I need to add some more text after that. It seems a cell can't contain multiple fonts i.e. symbol and arial.

This is what I want it to display

(text removed) Short

Dan

I want to insert phi in a column header. When I try to change the font size I get the attached picture (look at 4th column header)

QUOTE

I confirmed that this doesn't work in XP with LV8.2 (that's all I had installed). What happens if you open this vi? It should look about like the screenshot I posted above, but with each character in its own comment/constant

I opened the VI and I see the Phi Symbol

Why does that work?

Dan

QUOTE (TobyD @ Feb 23 2009, 01:13 PM)

Hmm, not sure what is going on then. It works fine for me using the application font (LV 8.6 on windows vista).

http://lavag.org/old_files/monthly_02_2009/post-8758-1235412709.png' target="_blank">

I am using XP.

Great I love these kind of problems... :headbang:

QUOTE (TobyD @ Feb 23 2009, 12:52 PM)

Have you tried the alt code for phi (alt+237 φ or alt+232 Φ). They both work in a string constant. If you're not familiar with alt codes, simply hold down the alt key and type the number combination on the keypad, then release the alt key.

I tried that in LabVIEW 8.6.1 using the application font all I get is "F"

QUOTE (neBulus @ Feb 23 2009, 12:36 PM)

I thought this was a purely font issue. If the font you are using supports that character it will work. So check your font?

Ben

I have found the Symbol font supports Greek Characters, however I need to have Greek and Latin letters in my text.

Hello,

Does any know how to insert phi in LabVIEW?

φ

I tried typing the unicode (03C6) and cutting and pasting from word.

Thanks

Dan

You can create a simulated channel in daqmx

http://zone.ni.com/devzone/cda/tut/p/id/3698

Wow Tom that is fantastic!! Congratulations!

"announcer" Hey Tom now that your a PhD, what are you going to do now?

"you" I'm going to the SEMLUG meeting!!!

<scene with parade and balloons>

QUOTE (kowdtek @ Feb 17 2009, 12:30 PM)

I'm still new in LV however, I want to set up an air pressure set point using PID instead of traditional slider to adjust the air pressure. I'm wondering if someone can atleast give me a starting point to do this.

Thank you very much!

Check out the PID Toolkit

http://sine.ni.com/nips/cds/view/p/lang/en/nid/1394

QUOTE (BobbyCee @ Feb 15 2009, 08:40 AM)

Does anyone know of a LabVIEW user group in Mid-Michigan? If not, would anyone like to start one? I live in Midland and know of several developers living in the Mid-Michigan area. It would be great to have a centralized group. So, if there are any wireworkers interested in getting together from the Mid-Michigan area, let me know!

We have a user group for West Michigan and South East Michigan

http://decibel.ni.com/content/groups/south...view-user-group

http://decibel.ni.com/content/groups/west-...view-user-group

I live in Lansing. If you want any help on setting up a User group or need an Alliance member sponsor let me know.

Dan

QUOTE (TobyD @ Jan 21 2009, 11:20 AM)

Thanks Dan! I hadn't noticed this yet. The old user group site for the Northwest (daqman.com) was so painfully slow that I stopped trying to visit the site. This should improve the experience. :thumbup:

-Toby

I have been happy so far with NI's site. I used to host it on mine, but I HATE managing websites. NI has some really cool tools to help create a very useful site. What is also cool, now the user groups are more connected. For example all the presentations that were given at Michigan user groups are available to everyone

Hello,

If you haven't checked this out NI is now hosting user group websites on ni.com

http://decibel.ni.com/content/community/zo...bviewusergroups

Also if you are from the Michigan area check out our group websites and register!

http://decibel.ni.com/content/groups/south...view-user-group

http://decibel.ni.com/content/groups/west-...view-user-group

Hello,

http://www.ni.com/niweek/presentations.htm

NI week call for presentations deadline is Feb.16. I think it would be great if the LAVA community could identify some presentations they would like to hear at NI week. It always nice to hear presentations on relevant and interesting topics.

So I was poking around looking at more backup options and I came across this.

http://www.tigerdirect.com/applications/Se...7&CatId=207

It is NAS (Network Attached Storage). 1TB of storage with 2 RAID drives, automatic backup, plus I and other people can access my data from the internet. This looks a lot easier to set up than a traditional server, and some of these are around $150!

This looks to good to be true.

Has anyone had any experience with NAS?

Thanks

Dan

QUOTE (neB @ Jan 7 2009, 12:13 PM)

2) How would they be compensated?

Beer of course

QUOTE (crelf @ Jan 7 2009, 11:32 AM)

IMHO I think NI's certification is very good. It is not perfect (what is), but I did learn a lot going through the process. Getting my CLD was the biggest jump in my LabVIEW programming carer. I would highly recommend to anyone who wants to become a better LabVIEW programmer

QUOTE (BobHamburger @ Jan 6 2009, 10:29 PM)

Well, now you're getting into the other half of my exasperation with NI exams: the questions are exceedingly poorly written. Their ambiguity is legendary, and over the years, the ambiguity has put on weight.

Right now the CLD is the only gig in town. It has it's flaws, but it is the only recognized tool for evaluating one's LabVIEW skills.

Maybe there should be the LAVA certified developer. :ninja:

I like storing all my Queue in a FGV. I also store my DAQ tasks in FGV too.

QUOTE (brianafischer @ Jan 5 2009, 01:27 PM)

Thanks for the reply Dan. That would be a great solution for hardware triggering, but the use case I was considering would not involve DAQ hardware. Any ideas for this?

Hmmmm.

I think you are going to have to poll. You have to keep track of time and ask what time it is relative to that. I like using a FGV to do this. You could put the FGV in a dedicated loop and send a message to your main loop when the time elapsed.

Dan

http://lavag.org/old_files/post-8614-1231180877.vit'>Download File:post-8614-1231180877.vit

Hello,

I like using change detection events

You can incorporate this into an event loop. I usually use a producer/consumer archtecture with the events being the producer and a queued state machine as the consumer.

You could set up a counter timer channel to send out a pulse every millisecond and wire that into a change detection digital input.

Dan

I just started using Tortoise SVN. I like it a lot.

It took me a couple days of reading the manuals, but now I have a basic understanding. I use it for all my files that need revision control not just LabVIEW and so far I am very happy.

The documentation is good and I really like the price!

Dan