Z index handling

Hi to all!
The purpose of my application: monitoring of the motion control system.
Monitored equipment:
1.       Motion controller + motor.
        http://www.yetmotion.com/YetIsrael/Products.asp?Currentcategory_id=44&Currenttat_category_id=70
        http://www.yetmotion.com/YetIsrael/ProductDetails.asp?ID=15
Monitoring equipment:
1.       NI PXI-6602
2.       Quadrature encoder with Z – index. (The encoder is connected to the shaft of the motor).
Right now the encoder not defined. Instead of the encoder I’m using PG-out of my motion controller. It works exactly as usual quadrature encoder.
The application is written in labview 8.2.1 and right now it is nothing more than "Meas Angular Position-Buffered-Cont-Ext Clk.vi" from labview examples.
I need an application that performs counter reset not each z-index.
My motion controller implements command such as SLIDE(velocity), Home_C and so on.
Command sequence (for my motion controller):
Slide 1000 – my motor revolves with 1000rpm (The duration of the movement is not configured).
After 10 min the position is 312445878 ticks (The number is for exemplifying).
In my encoder Z-index comes every 16384 ticks
Home_C 100 – perform homing on C-pulse. (Go to the Z-index and reset the actual position of my controller).
In this example Z-index happened 312445878/16384=19070 times, and only when I send Home_C command, on the next Z-index it will reset the position value.
So, what I want is that PXI-6602 will monitor the actual position value according to the circumstances.
Thanks in advance!
Izia
YET
www.yetmotion.com

Hi Izia,
Technically, a position-capture task is an edge-counting task with a little more configuration done for you. In this case, you are probably best to use one of the Angular Position examples. The example that you specified should work fine. I think that I originally misunderstood the question.
In order to reset the z index count, you will need to configure the z index using the DAQmx Create Channel function. From the LabVIEW help:
z index enable specifies whether to use Z indexing for the channel.
z index value specifies in units the value to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with z index phase.
z index phase specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than A High B High.
When signal Z transitions to high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B.
A High B High (10040)
Reset the measurement when signal A and signal B are high.
A High B Low (10041)
Reset the measurement when signal A is high and signal B is low.
A Low B High (10042)
Reset the measurement when signal A is low and signal B high.
A Low B Low (10043)
Reset the measurement when signal A and signal B are low.
Lastly, I recommend that you look at this knowledge base article for more information about resetting the z index.
I think that the example you are using should give the desired results if configured correctly. Please let us know if you have further questions.
Thanks,
Luke
Applications Engineer
National Instruments

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Revision: 13754
Author:   [email protected]
Date:     2010-01-25 10:56:31 -0800 (Mon, 25 Jan 2010)
Log Message:
Restore ability for HTTP streaming index handler to send/receive arbitrary context associated with an index, per Matthew's feedback.
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[svn:osmf:] 13966: 1. Integrate code changes from Matthew to remove timeBias and add support for subclip

Revision: 13966
Revision: 13966
Author:   [email protected]
Date:     2010-02-03 15:04:44 -0800 (Wed, 03 Feb 2010)
Log Message:
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// >>>>> WHAT IS THE CORRECT DECLARATION FOR '?' <<<<< ??????????????????
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   * @param key is unique key
   * @return the object or null if no such object
public <C extends Comparable<? super C>> T select(int handle, C key) {
      BlaObjectCacheIndex<T,C> index = (BlaObjectCacheIndex<T,C>)indexes.get(handle);
      T obj = index.get(key);   // get object from cache
      if (obj == null) {
        // not in cache: get it from storage
        obj = index.select(key);
        if (obj != null) {
          // add object to all indexes
          for (BlaObjectCacheIndex<T,?> ndx: indexes) {
            ndx.add(obj);
      return obj;
}and the cache index:
import java.util.*;
* Generic Cache index.
public abstract class BlaObjectCacheIndex<T extends BlaObject, C extends Comparable<? super C>> {
private TreeMap<C, T> cacheMap;     // mapping of keys to BlaObjects
   * Create a new index.
public BlaObjectCacheIndex() {
    cacheMap = new TreeMap<C, T>();
   * Select a BlaObject by a unique key from storage.
   * @param key uniquely identifies the object
   * @return the selected object or null if it does not exist.
abstract public T select(C key);
   * Extract the key object.
   * @param object is the object to extract the key from
   * @return the key
abstract public C extract(T object);
   * get object from cache by key.
   * @param key is the Comparable that uniquely identifies the object
   * @return the object or null if not in cache
public T get(C key) {
    return cacheMap.get(key);
   * add an object to the index.
   * @param object is the object to append
   * @return true if added, false if object already in index
public boolean add(T object) {
    return cacheMap.put(extract(object), object) == null;
}The BlaObjectCacheIndex is 100% generic and typesafe.
The problem arises in BlaObjectCache because it contains a
List of BlaObjectCacheIndexes with different <C extends Comparable<? super C>>.
Hence, I cannot make C a generic type variable
for BlaObjectCache. However, I can force type checking for 'C' in
the method-declarations of BlaObjectCache.
Unfortunately, there is no way to describe
that this List contains such elements. At least, I couldn't figure out
how, so far :-(
My reasoning is: there is no nasty type-casting or whatever trick in BlaObjectCacheIndex.
The type-constraints correspond to the real demands of the application.
A generic type like <C extends Comparable<? super C>> is not rocket science ;-)
I just want to learn how to get the List-declaration right.
Can you explain how?
Regards,
Harald

[svn:osmf:] 13985: Phase 2 of the MBR refactoring.

Revision: 13985
Revision: 13985
Author:   [email protected]
Date:     2010-02-04 22:29:47 -0800 (Thu, 04 Feb 2010)
Log Message:
Phase 2 of the MBR refactoring. Implement play2 on HTTPNetStream. Necessitated modifying the index handler to expose the stream names via a notify event (though this approach may change). Isolate HTTP setup code to HTTPStreamingNetLoader. Refactor NetStreamPlayTrait to be completely agnostic to NetStream type. Merge NetStreamDynamicStreamTrait and HTTPStreamingNetStreamDynamicStreamTrait. Introduce temporary loaded context for F4MElement to avoid RTEs.
The end result is that RTMP and HTTP stream switching now use the NetStreamSwitchingManager, rather than RTMP using the former and HTTP using internal switching logic. Still need to determine whether to remove HTTPNetStream's switching logic, or keep there for other use cases. Note that we still need to extract HTTPNetStream's switching logic into one or more switching rules (that's phase 3, still to come). Doing so might involve modifying the MetricsProvider to take into account any variations in metrics between RTMP and HTTP.
Modified Paths:
    osmf/trunk/framework/OSMF/.flexLibProperties
    osmf/trunk/framework/OSMF/org/osmf/events/HTTPStreamingIndexHandlerEvent.as
    osmf/trunk/framework/OSMF/org/osmf/manifest/F4MLoader.as
    osmf/trunk/framework/OSMF/org/osmf/net/NetStreamPlayTrait.as
    osmf/trunk/framework/OSMF/org/osmf/net/dynamicstreaming/NetStreamDynamicStreamTrait.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/HTTPNetStream.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/HTTPStreamingNetLoader.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/HTTPStreamingUtils.as
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/f4f/HTTPStreamingF4FIndexHandler.as
    osmf/trunk/framework/OSMF/org/osmf/video/VideoElement.as
Added Paths:
    osmf/trunk/framework/OSMF/org/osmf/manifest/F4MLoadedContext.as
Removed Paths:
    osmf/trunk/framework/OSMF/org/osmf/net/httpstreaming/HTTPStreamingNetStreamDynamicStreamT rait.as

Many thanks for the fast reply.
I've got a follow up question.
What will happen if I modify the reconnect Code in the OSMF Netloader Class as recommended and then load multiple third party OSMF plugins,
which may have included the origin OSMF version of the Netloader class.
Which one will be used at runtime?
Thanks in advance!

In-Context Editor can't handle implicit index.html

The In-Context Editor can't handle implicit index.html - e.g., when a menu link points to /subfolder/ with a file named index.html inside, the link works fine on the front-end but In-Context Editor users get a 404 Page Not Found error.
Naively, it appends .htm to the folder, producing an invalid url like this: /subfolder/.htm
The workaround is to explicitly include the filename in the link like /subfolder/index.html, but this is undesirable.
Anyone else been bitten by this?

/subfolder
Will go to the same place as well.

HT3350 what can you do when you get this warning? "Scouting Book Collection Index" could not be handled because Numbers cannot open files in the "Numbers Document" format.

“Scouting Book Collection Index” could not be handled because Numbers cannot open files in the “Numbers Document” format.

This file was created in 2002 in MSword but this had been forgotten.
When I went to open it.... (MSword) was not a program option on my laptop. For some reason, I assumed that either Pages or Numbers wouild open the file. How the file was created was forgotten and had no file Info, but I new that it was a table of valuable information.
The warning threw me off, because it led me to believe that it was a Numbers file. which Numbers would not open. A paradox.
I took the file to a laptop in OSXpanther with MSoffice and it opened in MSword. Problem Solved.
Thank you for your help.

Invalid request - request handler "Index" not found

Have deployed JatoSample.war on iPlanet web server. When I tried to access the sample app at http://myserver/JatoSample/samples.html
it is throwing following error:
[19/May/2003:10:29:31] warning (19890): vs(https-abeesam2)Application Error
[19/May/2003:10:29:31] warning (19890): vs(https-abeesam2)javax.servlet.ServletException: Invalid request - request handler "Index" not found
at com.iplanet.jato.ApplicationServletBase.onRequestHandlerNotFound(ApplicationServletBase.java:371)
at com.iplanet.jato.ApplicationServletBase.fireRequestHandlerNotFoundEvent(ApplicationServletBase.java:114)
at com.iplanet.jato.ApplicationServletBase.getViewBeanInstance(ApplicationServletBase.java:224)
at com.iplanet.jato.ApplicationServletBase.processRequest(ApplicationServletBase.java:569)
at com.iplanet.jato.ApplicationServletBase.doPost(ApplicationServletBase.java:85)
at com.iplanet.jato.ApplicationServletBase.doGet(ApplicationServletBase.java:74)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.server.http.servlet.NSServletRunner.invokeServletService(NSServletRunner.java:919)
at com.iplanet.server.http.servlet.WebApplication.service(WebApplication.java:1061)
at com.iplanet.server.http.servlet.NSServletRunner.ServiceWebApp(NSServletRunner.java:981)
Any help is much appreciated.
Ashok Beesam

For purchased copies of the Sun ONE Application Framework (JATO), please contact Sun Software Support Services. This organization can provide "break and fix" assistance.

Z index handling

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