HELP NEEDED CREATING VI WITH POTENTIOMETER

Hi Everyone,
I have a DAQ 6009, linear potentiometer and a spring.
I want to measure the displacement of a spring using the linear pot and correspond this displacement into a force by multiplying by spring constant k. (F=-k.x)
F=force, k = spring constant, x = displacment
I need to create a VI that will,
Take voltage readout of potentimeter and correspond it to 0-110mm displacement of spring. ie 0V=0mm, 5V =110mm.
Multiply the displacement mm by k (which is 25).
Record values into excel file and display when stop button is pressed.
Record peak force (amplitude).
When the pot is fully extented it would correspond to 0mm/0V.
Please find attached current Labview VI and linear pot.
As you can see it is multiplying the voltage reading by 25, I want to correspond this voltage to a displacment and then multiply by 25 so I will have output in Newtons.
Thank you for your help,
John

I am fairly new to Labview, so excuse my lack of knowledge at the moment.
I didn't use a custom scale. Can you inform me of what to do?
I multiplied voltage by 20 to correspond it to mm then by k (25) to convert it to a force, is this correct?
I reversed the ground and 5V supply on the 6009 so it will be reading 0 when pot is fully extended?
Below is DAQ Assistant and Block diagram/front panel.
Also my read from measurement file graph is only generating a somewhat straight line instead of an actual waveform??

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Attachments will not get through. Upload your file and post a
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joe501 wrote:
> Hi
>
> I am attempting to make a website in dreamweaver, with
animated swf files for
> the banner and buttons. My problem is with the sizes.
>
> I want to get all of the buttons next to each other,
with little or no gaps.
>
> I've tried making a table and putting each button in a
different column, but
> there are still massive gaps.
>
> The other problem is to do with the web browser, I
think.
>
> I want it to be like most sites, if the user dosent have
the page full screen,
> the banner and buttons will resize so that the user can
see all of the site,
> normally until you have squashed the browser halfway.
>
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> image resizes so you can see the whole of it, no matter
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> application.
>
> I want my imported swf file in dreamweaver to resize if
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> the web browser full size.
>
> For example, if you have your browser in windowed mode
now, drag the sides so
> that the application is squashed, you can still see the
post and the banner, it
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>
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attempted to make a proper
> website so i am a bit of a simpleton when it comes to
web design, and
> dreamweaver.
>
> Any help would be appreciated and you can speak to me on
msn if it's easier, i
> am:
>
> joe501 at hotmail dot com
>
> P.S if this is in the wrong section sorry!
>
Bonnie in California
kroko at
sbcglobal dot net
http://www.theanimalrescuesite.com/cgi-bin/WebObjects/CTDSites.woa

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FileOutputStream fos = new FileOutputStream(f);
m_graph.exportToGIF(fos);
I then use Forms to Pass the clients temp location and save the file to the local PC temp location as img.gif.
Unforunately this came up with user rights problems and in order to make this work we needed to sign the certificate. BUT by signing the certificate it meant EVERY one of our customers has to approve the changes once we give them the new JAR. Unforunately we use (as per Oracle Certification) JRE 1.4.2_13 and when the customers go to approve the changes it crashes JAVA (if they have previousely used the system). The only way to get round this (that we have found) is to clear all signitures and clear cache on the JRE. This is something that our customers will not accept doing.
I posted that initial JRE problem but not had any comeback so my next question is. Is there a way to do what we need to do without the need of signing the JAR?
The graph pre these changes did not need the approvals. So im assuming its the fact we want to place something on the Client PC is what is requiring the approval. Can we do what were doing but place the JPG on the Server and use something like webutil to get the file over. Meaning we dont need to use a different JAR?
Any help would be most appreciated

Hi,
I cannot help you much on the issue, but I can confirm some of your thought. Signing is indeed required because you're trying to access the user's PC, which is a potential security breach hence why Java requires that the user agrees to it when the application goes out of the normal sandbox. You can check out http://www.securingjava.com/chapter-two/ as an introduction on the subject.
I don't really get your use case though, you simply want to print the generated gif file right, so why do you write it on the user's hard drive?
Regards,
~ Simon

Basic help needed creating a trigger

I'm completely new to SQL programming altogether, and I'm trying to set up a trigger that will make some checks before adding a new row to a given table. I am trying to do this because I need to enforce a CONSTRAINT that checks whether the dates entered for 'deadline' and 'startDate' are greater than sysdate and less than (sysdate + 365), and I found out that you cannot reference sysdate from a CONSTRAINT. Therefore I am now attempting to do this using a trigger, but I don't really know how to do this. Here is the sql code used to create the table:
-- PLACEMENT TABLE
DROP TABLE placement;
CREATE TABLE placement
contactId Int,
placementId Int,
position VARCHAR(60),
description CLOB,
lengMonths Int,
salary Number(7,2),
deadline DATE,
startDate DATE,
addrLine1 VARCHAR(120),
postCd VARCHAR(10)
And here is my attempt at creating the trigger that will only allow the deadline and startDate to be entered if they satisfy the following check: (sysdate < deadline/startDate <= sysdate+365)
CREATE OR REPLACE TRIGGER trg_deadline_low BEFORE INSERT OR UPDATE OF deadline ON placement
BEGIN
IF :deadline <= SYSDATE THEN
ROLLBACK;
END IF;
END;
CREATE OR REPLACE TRIGGER trg_deadline_high BEFORE INSERT OR UPDATE OF deadline ON placement
BEGIN
IF :deadline > SYSDATE + 365 THEN
ROLLBACK;
END IF;
END;
If possible, I would like for these triggers to display an error rather than just using ROLLBACK, but I'm not sure how! At the moment, these triggers do not work at all; I get an error message "Warning: Trigger created with compilation errors." when I attempt to create the triggers in the first place.
Can anyone tell me why I am seeing this error when trying to implement the triggers? And if anyone could also improve on my amateur attempt at coding a trigger, then that would be great! Thanks for any help!

Oops!
Nicolas, Thank you for correcting my mistake.
SQL> edit
Wrote file afiedt.buf
1 CREATE TABLE placement
2 (
3 contactId Int,
4 placementId Int,
5 position VARCHAR(60),
6 description CLOB,
7 lengMonths Int,
8 salary Number(7,2),
9 deadline DATE check (deadline between sysdate and sysdate+365),
10 startDate DATE,
11 addrLine1 VARCHAR(120),
12 postCd VARCHAR(10)
13* )
SQL> /
deadline DATE check (deadline between sysdate and sysdate+365),
ERROR at line 9:
ORA-02436: date or system variable wrongly specified in CHECK constraint
SQL> edit
Wrote file afiedt.buf
1 CREATE TABLE placement
2 (
3 contactId Int,
4 placementId Int,
5 position VARCHAR(60),
6 description CLOB,
7 lengMonths Int,
8 salary Number(7,2),
9 deadline DATE check (deadline between to_date('2007-03-21','yyyy-mm-dd') and to_date('2008-03-21','yyyy-mm-dd')
10 startDate DATE,
11 addrLine1 VARCHAR(120),
12 postCd VARCHAR(10)
13* )
SQL> /
Table created.
On the contrary, I think that OP want an error instead of rollback : "I would like for these triggers to display an error rather than just using ROLLBACK"Ah, I had misread additionally. Sorry.

Help needed creating a linked list program

I have been trying to create a linked list program that takes in a word and its definition and adds the word to a link list followed by the definition. i.e. java - a simple platform-independent object-oriented programming language.
the thing is that of course words must be added and removed from the list. so i am going to use the compareTo method. Basically there a 2 problems
1: some syntax problem which is causing my add and remove method not to be seen from the WordList class
2: Do I HAVE to use the iterator class to go thru the list? I understand how the iterator works but i see no need for it.
I just need to be pointed in the right direction im a little lost.................
your help would be greatly appreciated i've been working on this over a week i dont like linked list..........
Here are my 4 classes of code........
* Dictionary.java
* Created on November 4, 2007, 10:53 PM
* A class Dictionary that implements the other classes.
* @author Denis
import javax.swing.JOptionPane;
/* testWordList.java
* Created on November 10, 2007, 11:50 AM
* @author Denis
public class Dictionary {
 /** Creates a new instance of testWordList */
 public Dictionary() {
 boolean done=false;
String in="";
while(done!=true)
in = JOptionPane.showInputDialog("Type 1 to add to Dictionary, 2 to remove from Dictionary, 3 to Print Dictionary, and 4 to Quit");
int num = Integer.parseInt(in);
switch (num){
case 1:
String toAdd = JOptionPane.showInputDialog("Please Key in the Word a dash and the definition.");
add(toAdd);
break;
case 2:
String toDelete = JOptionPane.showInputDialog("What would you like to remove?");
remove(toDelete);
break;
case 3:
for(Word e: list)
System.out.println(e);
break;
case 4:
System.out.println("Transaction complete.");
done = true;
break;
default:
done = true;
break;
 }//end switch
}//end while
}//end Dictionary
}//end main
import java.util.Iterator;
/* WordList.java
* Created on November 4, 2007, 10:40 PM
*A class WordList that creates and maintains a linked list of words and their meanings in lexicographical order.
* @author Denis*/
public class WordList{
 WordNode list;
 //Iterator<WordList> i = list.iterator();
 /*public void main(String [] args)
 while(i.hasNext())
 WordNode w = i.next();
 String s = w.word.getWord();
 void WordList() {
 list = null;
 void add(Word b)
 WordNode temp = new WordNode(b);
 WordNode current,previous = null;
 boolean found = false;
 try{
 if(list == null)
 list=temp;
 else{
 current = list;
 while(current != null && !found)
 if(temp.object.getWord().compareTo(current.object.getWord())<0)
 found = true;
 else{
 previous=current;
 current=current.next;
 temp.next=current;
 if(previous==null)
 list=temp;
 else
 previous.next=temp;
 }//end else
 }//end try
 catch (NullPointerException e)
 System.out.println("Catch at line 46");
 }//end add
/*WordNode.java
* Created on November 4, 2007, 10:40 PM
*A class WordNode that contains a Word object of information and a link field that will contain the address of the next WordNode.
* @author Denis
public class WordNode {
 Word object;//Word object of information
 WordNode next;//link field that will contain the address of the next WordNode.
 WordNode object2;
 public WordNode (WordNode wrd)
 object2 = wrd;
 next = null;
 WordNode(Word x)
 object = x;
 next = null;
 WordNode list = null;
 //WordNode list = new WordNode("z");
 Word getWord()
 return object;
 WordNode getNode()
 return next;
import javax.swing.JOptionPane;
/* Word.java
* Created on November 4, 2007, 10:39 PM
* A class Word that holds the name of a word and its meaning.
* @author Denis
public class Word {
 private String word = " ";
 /** Creates a new instance of Word with the definition*/
 public Word(String w) {
 word = w;
 String getWord(){
 return word;
}

zoemayne wrote:
java:26: cannot find symbol
symbol : method add(java.lang.String)
location: class Dictionary
add(toAdd);this is in the dictionary class
generic messageThat's because there is no add(...) method in your Dictionary class: the add(...) method is in your WordList class.
To answer your next question "+how do I add things to my list then?+": Well, you need to create an instance of your WordList class and call the add(...) method on that instance.
Here's an example of instantiating an object and invoking a method on that instance:
Integer i = new Integer(6); // create an instance of Integer
System.out.println(i.toString()); // call it's toString() method and display it on the "stdout"

Help needed creating a Live Poll

I am relatively new to flash. I need to create a website that has only one question on it, and then displays the poll results automatically after a user makes a selection, showing the overall results updated in real time. Can anyone point me in the right direction on where to get started with this. I imagine I will need some php and possibly mysql to make this guy go. Any help would be geatly appreciated.
Scott

in as2, use two different instances of loadvars. one to send variables/values and the other to receive:
var sendLV:LoadVars=new LoadVars();
var receiveLV:LoadVars=new LoadVars();
receiveLV.onData=function(src){
// do whatever
sendLV.var1=xxx
etc
sendLV.sendAndReceive("yourasp.asp",receiveLV,"POST"); // assuming your asp si expecting posted variables.

Help needed creating GUI simulation

Hello,
I have created a 2d image showing a ship on waves. This is done using java2d. I output using JFrame.
I now want to animate it so it moves along the frame size should remain the same but the ship should
appear to move on water... I think time will be involved so the ship moves along the x axis...
please can some one help how to animate this/simulate the ship moving
currently i only have java2d image of a ship and waves..
thanks

moh_1_and_only wrote:
please can some one help how to animate this/simulate the ship movingThis forum does poorly answering general and broad questions such as these. Also, this forum is not a site for tutorials as it is asking way too much of a volunteer. The best I can recommend is search here and on google for articles on java animation. You will get better answers and help here with more specific questions.
Another tip: look into the Swing Timer class to help with the animation. You will likely need to use threading as well. If you're not up on this, I suggest the Sun Java Threading tutorials.
Edited by: petes1234 on Dec 19, 2007 7:47 AM

HELP NEEDED CREATING VI WITH POTENTIOMETER

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