Motor code

Hi,
I took the example Velocity Profiling and modified it for two motors, the error came out said no Board ID are wired, but they are wired. Can anyone check the code for me please?
Thank you
CKH
Solved!
Go to Solution.
Attachments:
Velocity Profiling.vi ‏628 KB

Hi CKH,
So right after your Stop Motion.flx VI, you can put a "Reset Position.flx" VI, located in the Functions Palette at Vision and Motion >> NI 73xx >> Trajectory Control. The attached screenshot shows you where it is. If you'll notice, the functions around here provide many control options for your motor, many of the operations you perform in MAX.
I hope this helps.
Ravi A.
National Instruments | Applications Engineer
Attachments:
reset position.png ‏38 KB

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Hello, first to
apologize for my bad English
I made a program for
driving a stepper motor CW and CCW with pulse.
I used USB-6008 for
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Now I’m making a program for driving a motor with typed in
code:
F=4        // Forward
(CW) 4 steps
B=12     //Backward
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Attachments:
Step Motor Bot.vi ‏82 KB
Motor.vi ‏139 KB
Parser.vi ‏30 KB

Step Motor bot only runs once.
If you pick Auto and run it, the block gets parsed into two arrays. You pick out the first row of the array and send that to STM. But there is nothing left to loop back and and set the other values in your parser. Turn on Execution Highlighting and run it. I'll think you see what is going on.
I think you still need to rethink your architecture. I think the Action Engine nugget would help you figure out what you want to do.
Message Edited by Ravens Fan on 02-02-2009 05:49 PM
Attachments:
Step Motor Bot_BD.png ‏19 KB

Need help with LabVIEW code for motor control.

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My name is Sasi. I am a BME grad student working on my thesis topic of evaluating spine implants for low back pain. For this I am building a test machine that would apply pure moments to a spine specimen. I am using LabVIEW 8.5 to implement control of a brushless AC servo motor. My requirement is,
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Till now I have managed to get the motor to move forward n backward @ a desired vel, accl, n deceleration for 3 cycles. I am attaching my code. I am having problem inserting the code for reading DAQmx amidst all this. Can anyone help me out.
Thnks,
Sasi.
Solved!
Go to Solution.
Attachments:
Test_012609.vi ‏35 KB

Hi Sasidhar,
I took a look at your problem and I think I have a workable solution for you. I definitely agree with Lynn's suggestion of using parallel loops. This will allow the DAQmx portion to run uninhibited by the motion portion, and vice versa. Plus, you only need to iterate the motion loop whenever the voltage level crosses a threshold. So, by iterating on the motion code in the same loop that you are iterating on DAQmx code, you are essentially wasting processor.
I created a VI that should do what you are wanting. I tested it out myself and it works great. You might have a tweak a few things to apply to your system (like motion board ID and DAQmx physical channel, etc.). I used two parallel loops and event-based programming. Basically the motion loop starts the motor spinning at the specified velocity. Once the motor is spinning, it waits for the DAQmx loop to tell it that the voltage value has crossed the threshold. When the voltage value exceeds the maximum threshold (which I set to a value slightly less than 10 to allow for jitter and saturation), the DAQmx loop signals the motion loop that it can finish its iteration. The motion loop stops the motion, reverses the direction, and starts the motion again. Once motion has started, it again waits for the DAQmx loop to tell it that a threshold has occurred, but this time, it is looking for a minimum threshold. I used "Occurrences" to implement the event-based programming in LabVIEW.
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Message Edited by Wes P on 02-03-2009 05:18 PM
Wes P
Certified LabVIEW Developer
Attachments:
Motion and DAQ.vi ‏59 KB
DAQmx Loop.png ‏24 KB
Motion Loop.png ‏17 KB

Stepper motor and loacell PID control - waveform motion.

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Attachments:
PIDControl.vi ‏23 KB
BIOGROWTH.lvproj ‏46 KB

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Attachments:
General PID Simulator.vi ‏22 KB

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Hey,
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Load error code 3 unable to load front panel

Hi all,
Wrote a vi in 8.6 and saved it for 8.5 for collaborators. When they run it up pops the error code 3 unable to load front panel. Memory full. see attached picture.
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Regards,
leeser
Attachments:
labview error code 3.png ‏51 KB

Hi guys,
Thanks for the comments,
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Attachments:
rotation_control.zip ‏178 KB
rotation_control_v8.6.zip ‏60 KB
NCLA_rot_usb_v8.5 Folder.zip ‏141 KB

Help with code to print HTML in Java 5

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    Kei G. Gauthier
    Suite 301
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    jeditorPane = new JEditorPane();
    setDocument("text/html",htmlDocument);
/* Method to set the Document to print as the one contained in a JEditorPane.
    This method is useful when Java does not provide direct access to a
    particular Document type, such as a Rich Text Format document. With this
    method such a document can be sent to the DocumentRenderer class enclosed
    in a JEditorPane.
public void setDocument(JEditorPane jedPane) {
    jeditorPane = new JEditorPane();
    setDocument(jedPane.getContentType(),jedPane.getDocument());
/* Method to set a PlainDocument as the Document to print.
public void setDocument(PlainDocument plainDocument) {
    jeditorPane = new JEditorPane();
    setDocument("text/plain",plainDocument);
/* Method to set the content type and document of the JEditorPane.
protected void setDocument(String type, Document document) {
    setContentType(type);
    jeditorPane.setDocument(document);
/* Method to set the current choice of the width scaling option.
public void setScaleWidthToFit(boolean scaleWidth) {
    scaleWidthToFit = scaleWidth;
}The sample input file is "mark.html":::
<html>
<head>
<style type="text/css">

</style>
</head>
<body>
<p style="margin-top: 0">
</p>
<table width="500" cellspacing="20" border="1">
<tr>
<td height="330" valign="top">
<table border="0">
<tr>
<td>
<font size="2">This is to certify that [[Client Name]], born
on [[Client Date of Birth]], of [[Client Residential
                Address]], was the holder of motor vehicle driver
licence number [[Client Licence Number]], first issued on
[[First Issue Date of Holding]] and expired on [[Holding
                Expiry Date]].<br></font>
</td>
</tr>
</table>
</td>
</tr>
</table>
<table width="500" border="2">
<tr>
<td>
<table width="480" border="0">
<tr>
<td align="right">
<font size="2"><br>
<b>Fred Flintstone<br>Manager</b><br>Records Services Division<br>State
Police<br>An authorised person for the purposes of the
Road Act 1986</font>
</td>
</tr>
<tr>
<td align="left">
<font size="2"><b>User ID: wzvqv7<br>Dated: 29 November 2006</b>
</font>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>

I have finally cracked it!!!!!!!!!!!!!!!!
The issue is definitely with Java Sun. "Uneven character spacing when printing JTextComponent"
It is raised on the http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6488219
And currently in OPEN state, and raised on 31 Oct 2006 and mentions it was caused by fix 4352983.
So where do we go from here. It's not good because I have tried all later version of the JVM and the issue is still there.
Why? Because it hasn't been fixed yet. Read the bug report above, as it gives more insight -- and mentions the workaround is NOT good for existing code.
So the way forward is to use an earlier version of the JVM 5.
I download the JVM version 1.5.0 (starting version) and works Ok... I would probably think version prior to 4352983 would be Ok too.
Please vote for this.... We have a workaround (use older version of the JVM).
So I am very happy.

Using a seperate thread to control motors

Hi am new to Java and am struggling with a probelm.
The application is to control 4 motors connected to the parallel port. When the user presses a button the motor is set to a certain speed (byte output to port). Once the button is released the port outputs to stop the motors, i also have it working so multiple motors can be driven at the same time (multiple buttons held down) i have the code working ok, but at present the program just outputs a byte of data when its worked out what buttons are pressed/released.
The problem is i want to drive one of the motors using a crude form of PWM (output an 'on' byte, wait 1 second, output an 'off' byte, wait one second, ect)
This is clearly going to have to be performed in a loop that is basically an infinite loop untill the key is released. However the program also need to be listening for other key inputs to turn on other motors.
I think the best way to do it is to create a thread for the PWM that sleeps, allowing the program to do other things, and breaks out when it recieves an interrupt (triggered by another key press), however i am have major difficultly converting the code. at present the code looks like this:
private void DebugKeyReleased(java.awt.event.KeyEvent evt) {
int c;
c = evt.getKeyCode();
switch (c)
case 83:     Control(100);
               break;
     case 68:     Control(80);
               break;
     case 65:     Control(40);
               break;
     case 87:     Control(20);
               break;
private void DebugKeyPressed(java.awt.event.KeyEvent evt) {
int c;
c = evt.getKeyCode();
switch (c)
case 83:     Control(1);
               break;
case 68:     Control(8);
               break;
case 65:     Control(4);
               break;
case 87:     Control(2);
               break;
private void Control(int direction){
switch (direction)
     case 1:      forwards = 1;
               break;
     case 100:     forwards = 0;
break;
     case 2: backwards = 1;
               break;
     case 20: backwards = 0;
break;
     case 4:          right = 1;
               break;
     case 40: right = 0;
break;
     case 8:          left = 1;
               break;
     case 80:     left = 0;
break;
     global_direction = forwards*1+(backwards*2)+(left*8)+(right*4);
if(global_direction == 0)
moving = "Stopped";
short stop = 255;
lpt.output(Addr,stop);
     else if(global_direction == 1)
moving = "Backwards";
short Back = 239;
lpt.output(Addr,Back);
ECT, there are alot more if statements that account for all possibilities.
i want the backwards and forwards cases to enter loops that output data on and off for certain time periods.
can anybody suggest the best way to convert the code?
thanks for any info / help
cheers John

A finite state machine is an abstraction in which you have a finite collection of states, and a set of transitions between states. One state is active at a time. So a traffic light might have red, green, and yellow states, and transitions between green to yellow, yellow to red, and red to green. There can be multiple transitions out of a single state.
So for your app, each state might be a kind of signal or a kind of sequences of signals set to the motors, and the transitions would be taken when you need to change the signals. You could send the key events and time events to whatever state currently is active. That active state would then decide what transition to take based on the event.
I'm sure there will be an entry in Wikipedia about it.
If the code works, that's great, but (1) it's obviously not working entirely because you're posting here, and (2) code like this can get hairy very fast and thus hard to maintain and thus bug-prone. So if you can simplify it, it will only help.
If you want to use a thread, you can. You basically have that now. But instead of Thread.interruped as you have it now, you could just have the key press event change the value of the flag to one that will stop the loop.
(for example, you'd have a "running" boolean field, a "while(running) {" in your run() method, an the event can change the value of "running" from true to false to cause the thread to stop.

Can anyone tell me what apple hardware test error code apple hardware 4MOT/4/40000002: Exhaust-1153 or 1209 means? I am running a MacBook Pro.

Can anyone tell me what apple hardware test error code apple hardware 4MOT/4/40000002: Exhaust-1153 or 1209 means? I am running a MacBook Pro

The motor on the exhaust fan has failed or is failing.

Hp color laserjet 4700dn Error Code 59.c0

hp color laserjet 4700dn
Windows 7
Error Code 59.c0
Unit was purchased six years ago.
Unpacked and started for the first time yesterday.
Error code 59.c0
Online search mentioned motor.
Using menu, tested motor, motor tested okay.
Unit is plugged into computer, computer states unit is "Ready"

If the printer has been stored for six years without use, it is perhaps likely that something has seized, or is stuck, leading to the error message.
As this is a business class printer, you may be better off asking the question in the appropriate Business Support Forum - see http://h30499.www3.hp.com/t5/Printing-and-Digital-Imaging/ct-p/bsc-412

Error Codes after Apple Hardware Test...

After someone here told me I've been experiencing kernel panics, I did some digging on the x lab site and re-ran the Apple hardware test in loop mode. after 17 runs, it returned the error:
4MOT/2/40000005:Right Side
I can't seem to find a list of error codes anywhere. My MBP has two 1GB RAM chips, both were pre-installed when I got the machine from Apple. I haven't tried switching them to see if the same error is returned on testing or with ONLY one or the other installed to see if this is truly a RAM issue. I thought I'd post to the forum for ideas first...

I'm afraid I have no idea. If you have AppleCare, I would ask them about the error code. You do have a different error code (/2/ not /1/ and different number after the second slash) than the link, so perhaps it is not a fan motor that is your problem, though I'm hard-pressed to think of what other motors the MBP has (I don't think the hard drive is on the right side, for one.) Alternatively I can imagine, since you said it took you 17 tests to get the result, that this is an intermitent problem--for all I know, just a slightly loose/poorly soldered wire--and so istat hasn't detected the problem yet.
I think AppleCare or a Mac Genius is your best bet, if you have the one or can get to the other. In particular, unfortunately, Apple does not seem to publish the hardware error codes; it only makes them available to techs.
Good luck!

GPIB: I am having some problem in running Labview code properly.

Hello,
I have written a labview code to drvie my stepper motor (using GPIB function). This code is supposed to move
the stepper motors and keep updating the current position of motors. I am having an unique problem. This code runs fine for trial no.1st, 3rd, 5th and so on. While it fails to update for trial no 2nd , 4th, 6th and so on.
The main code is "motion_update_Final_Newport.vi". It will work for labview 7 as well as 7.1.
You may not be able to run this code. However, you may be able to understand my error easily as I have figured out where is the error. The update is based on a function, which returns (string) 0 for motion not done and 1 for motion done. This value is diaplayed in "output 1" and works fine. However, "check 2" which is an indicator does not work for trial no 2nd , 4th, 6th and so on.
If you go where I have "output 1", there is a while loop and "check 2" is an indicator for check. It remains on for trial no 2nd , 4th, 6th and so on.
I am attaching the code and this is for ESP 300 motion controller Newport co. I am certain that some of you would be able to figure out the error without running the code.
Thanx in advance,
DushyantMessage Edited by Dushyant on 04-18-2005 04:43 PM
Attachments:
modified_Motion_Update_Final_7.zip ‏228 KB

Thanks a lot for trying to help me.
I am sure that I am not moving any subvi.
Steps that I am trying to accomplish:
(i) I am moving the stepper motors for a relative distance.
(ii) Then I am trying to get the motor position after delay (ms) [defined in front panel].
Now, how I am trying to accomplish:
First outer stacked sequence:
seq 0 of outer: This sets GPIB as controller in command (without this I was having trouble when I was combining this with photodiode code). Please avoid this seq.
seq 1 of outer: The motor moves to certain relative distance. (I do not think that there is anything wrong here).
seq 2 of sequence: This part does updates the motor coordinate after delay (ms). Inside this, there is a case structure to choose whether I want the update.
If I want the update, then following steps take place inside the case structure:
Inner stacked sequence:
seq 0 of inner: [This is where I think that error is taking place] Inside this, There is a while loop which terminates when the "Motion Done?"
function returns "1", else "0". Inside the flat sequence structure, first sequence "updates" the motor coordinate while second check
whether the motion is done .
Seq 1 of inner: Controller wait till motor stops.
seq 2 of inner: The motor coordnate is updated for the last time.
seq 3 of outer: It clears the GPIB.Message Edited by Dushyant on 04-19-2005 10:22 PM
Attachments:
Wait_Till_Motor_Stops.vi ‏13 KB

Motor code

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