DC motor based on H bridge with a protection circuit

Hi Everybody,
I am not an expert in electricity, but i need to design a circuit for mechanical use.
I have a very basic knowledge on H bridge.
I need to implement an H bridge circuit which is capable of changing the rotation direction from forward to backward and vice versa, every 5 seconds.
My input is a sinusoidal with frequency of 0.1 HZ, Amplitude of 1 volt , which changes between 0 to 1 volt.
my DC motor has a resistance of 10 ohm, constant velocity of 1500 rotations per minute, and terminal voltage of +/- 10 volt. 
In addition, i need to protect the motor in case that the current exceeds 1A, only for time period of more than 10 msec.  
i can use a one 12 volt power supply, amplifier that can be used as comparators (LM324), 4 power transistors (2N6059)  for the H bridge, and resistors,capacitors,inductors and logic gates.
i will appreciate you for any information you can give me to start with. 

Dear Džon,
First of all, welcome to the NI Forums!
In order to actually implement a control system, you will either need Control Design and Simulation Toolkit  ( http://sine.ni.com/nips/cds/view/p/lang/hu/nid/138​54 )
or you will have to calculate the inverse Laplace of your resulting function and implement the numerical model. 
By implementation I mean that you will most likely have to use numerical Integration.
How you should do it is the following:
Get the highest order of the outputs derivate to the left side of you equation -->      a_n * Y^(n) = ....
where a_n is your coefficient resulted to Y^(n), then divide by a_n so you have something like: Y^(n) = ...
after this you must integrate n times in respect to time. So you will have the y(t) resulting function in time domain.
From there you must implement the equation on the right hand side with numerical methods. At the end you will most likely have a DAQmx task or an Express VI to actually output your control signal. (for that please refer to the examples of analog output / PWM)
However, if you have access to Control Design and Simulation Toolkit. You may realise your system in a simulation loop as replicate your block diagram structure. (Please check examples installed with the toolkit) 
If you have a specific question then please feel free to ask, and provide as much detail as possible.
Best regards,
Peter
Peter L.
National Instruments Hungary
Applications Engineer

Similar Messages

  • Please do you plan to produce T series of notebook with 15,6 display based on Sandy Bridge?

    Please tell me do you plan to produce T series of notebook with 15,6 inches display based on Sandy Bridge processors? Please write soon. I am looking forward to your answer. Tnank you in advance
    Solved!
    Go to Solution.

    pdzodic wrote:
    But I posted the question on this forum in order to gain official information.
    This is a peer to peer support forum for Lenovo users, not an official information channel, so your expectation was misplaced.
    Cheers,
    Bill B.
    I don't work for Lenovo

  • Sensorless control DC motor based on mathematic​al model

    Hi,
    I have DC motor, I put together mathematical model and transfer function of torque, speed and position PI control too.
    Can someone help me to implement it to real process? I need control real DC motor with H-bridge with sensorless method based on mathematical model. (using LW card 6211)
    Thank you veru much.
    Attachments:
    servo_control.JPG ‏52 KB

    Dear Džon,
    First of all, welcome to the NI Forums!
    In order to actually implement a control system, you will either need Control Design and Simulation Toolkit  ( http://sine.ni.com/nips/cds/view/p/lang/hu/nid/138​54 )
    or you will have to calculate the inverse Laplace of your resulting function and implement the numerical model. 
    By implementation I mean that you will most likely have to use numerical Integration.
    How you should do it is the following:
    Get the highest order of the outputs derivate to the left side of you equation -->      a_n * Y^(n) = ....
    where a_n is your coefficient resulted to Y^(n), then divide by a_n so you have something like: Y^(n) = ...
    after this you must integrate n times in respect to time. So you will have the y(t) resulting function in time domain.
    From there you must implement the equation on the right hand side with numerical methods. At the end you will most likely have a DAQmx task or an Express VI to actually output your control signal. (for that please refer to the examples of analog output / PWM)
    However, if you have access to Control Design and Simulation Toolkit. You may realise your system in a simulation loop as replicate your block diagram structure. (Please check examples installed with the toolkit) 
    If you have a specific question then please feel free to ask, and provide as much detail as possible.
    Best regards,
    Peter
    Peter L.
    National Instruments Hungary
    Applications Engineer

  • Bridge with Adobe Not So Raw

    Okay, I've become totally spoiled by Bridge and ACR. Now I want a program that opens up just the large preview of my TIFF files in Bridge and lets me make some simple curve / color adjustments which Bridge then batch applies to the TIFF while I sleep (or whenever). No that is not Photoshop - in PS you have to open up the full TIFF file and that takes forever for large 16 bit per channel scans. A pain when you have a bunch of them. And batch actions in PS don't work unless the color corrections are all the same - or you use "auto" which is, well, sometimes less than a "best" correction. I know you need to open up the actual pixels in PS to do things like cloning out of spots etc. etc. (which are now not so much an issue with digital ICE) but I *like* the way Bridge and ACR operates together and I really would like that for TIFFs (and JPGs, BMPs, etc.). So does anyone know of a program that does that? I wish that Adobe would add that as a Bridge "plugin" (or whatever) but since that is probably on the Bridge list somewhere between never and eternity I'd be willing to use something else for a while... I vaguely remember that the old dead "Live Picture" software worked a bit like that - but I'm not sure if I still have the disc and it wasn't integrated into Bridge - which of course didn't exist back then. Surely something or other current works like Bridge/ACR but on TIFFs without actually opening the whole TIFF file? Or maybe I just want a TIFF to DNG converter so I can do ACR-like batch things to TIFFs. Yeah, I know that is impossible...hence the request for a minimal TIFF/JPEG/BMP editor in Bridge that adjusts color based on the Bridge preview... I'd even pay extra for it. I'd even tolerate sidecar files!
    Dan

    Like Curt stated, in PS go to menu Photoshop / About Plug ins / Camera raw. This brings a window showing the correct version number of Adobe Camera Raw (it should state 6.7 and only one version visible.
    On you system it should be in this location:
    In Finder use column mode and click on your disk with the system on it (normally it shows 4 folders: Library , Users , Applications and System) Click on Library and follow this path / Application Support / Adobe / Plug-Ins / CS5.1 / File Formats. Inhere should be only one file called "Camera Raw.plugin"
    If you click on this file the info next to it should show the version number, in your case 6.7

  • Payload based sync/async bridge

    This is my scenario: ABAP -> XI -> MQ -> XI -> ABAP
    I want to use the message content to be the correlation key, it means ABAP sends a message with order no.="ORDER1" to MQ and MQ will reply a message contains order no.="ORDER1". Then XI will use this message from MQ to reply to the sync ABAP program. Is it possible ?
    I read this document "How-to Correlate JMS 1.20" to build a sync/async bridge (XI is 3.0 SP17)
    https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/5059f110-0d01-0010-7c8b-fdc983be70c0
    First, I followed 3.1 to build a "header based" sync/async bridge. It's ok, I can see a message id in the field "JMSCorrelationID" in MQ tool. (I didn't test reply). And then I checked 3.4 in the document and want to build a "payload based".
    There are only 2 steps in this document
    1. I modified the correlation to the order no. field of request message in the send step.
    2. I modified the correlation to the order no. field of reply message in the correlation editor.
    Is it ok ? Because when I ran the ABAP program again, I still see the same JMSCorrelationID in MQ?

    Thanks, so, the correlation id is encoded. I think I can see "ORDER1" originally. I changed it to "ORDER2" and see another correlation id and I changed it back to "ORDER1" and I see the original correlation id. I think the configuration of ABAP -> XI -> MQ should be correct now.
    Now my problem is MQ -> XI -> ABAP. I manually put a message with order no.="ORDER1" in the reply queue. XI got it, but show the error message in workbench. 
    "XI inbound processing failed for message at 2007-03-28|18:15:22.464+0800. JMS and XI identifiers for message are ID:414d51204d495453303153305420202045a35b480003f722 and 3cf8ed80-dd15-11db-a560-0017a47618a6 respectively. JMS adapter will rollback database and JMS session transactions"
    Both of the messages are not the encoded "ORDER1" and when I press refresh in workbench, the 2nd id in the error message is always changed. Is there any suggestion for it ? thanks.

  • I can't get Dr Browns Image Processor Pro to work from Bridge with Photoshop CC 2014

    We use the wonderful DR Browns Image Processor Pro script a lot, but cannot get it to work from Bridge with PS CC 2014. When I select files in Bridge CC and then go to Tools> Dr Browns Services 2.3.1 > Image Processor Pro it just pops up an error message that says ReferenceError: photoshop is undefined.
    The actual script works fine if I launch it from Photoshop CC 2014 - just not if I load it from Bridge CC.
    I have unistalled it and re installed a few times, both manually and through the Extension Manager CC.
    I am using a Win 7 64bit computer.
    I assume there is some change in the scripting part that loads Photoshop from bridge but not sure. It worked fine in CC. Just not CC 2014.
    I opened the Dr Browns Services .jsx file but don't see anything obvious. This is the section related to the Image Processor Pro part:
      // This routine takes an array of files. If called by Photoshop,
      // it will invoke Dr. Brown's Process 1-2-3 with the files. If called by
      // any other app, it will send a BridgeTalk message to Photoshop
      // to invoke this routine with the same arguments.
    drbrownserv.process123 = function (files) {
    // Bring Photoshop to the foreground.
      BridgeTalk.bringToFront ("photoshop");
      // Create a new BridgeTalk message for Photoshop to invoke
      // Image Processor with the selected files
      var btMessage = new BridgeTalk;
    btMessage.target = "photoshop";
      btMessage.body = "drbrownserv.process123 (" + files.toSource () + ");";
      btMessage.send ();
      } else {
    photoshop.runActionCommand ('611736f0-9c46-11e0-aa82-0800200c9a66', files);
      catch (error) {
      if (error.number != 8007) // Don't report user cancelled errors.
      drbrownserv.alert (error);

    I copied that .jsx file to a new name "Xbytor Image Processor Pro.jsx" edit that file changed the string Dr Browns services to "Xbytor Image Processor Pro" then commented out all the code that added tools menu items but "Image Processor Pro" and I put that file into
    "C:\Program Files (x86)\Common Files\Adobe\Startup Scripts CC\Adobe Bridge" even though Bridge CC is 64Bit seems to use theat location.
    Bridge CC was updated by the creative clouds update and opens Photoshop CC 2014 now

  • Analysis Authorization based on Hier node with multiple display hierarchies

    Hi guys - I've got a problem where s.o. might have an idea of how to switch on the light at the end of the tunnel, I am currently standing in:
    Requirement:
    Cost Center Authorization should be given through RSECADMIN, reporting should be possible for any hierarchy that exists for the authorization relevant info object.
    Preferred solution:
    The Cost Center Analysis Authorization should be given through RSECADMIN - Hierarchy node assignment.
    u2022     A dedicated Authorization Cost Center Hierarchy will be maintained in ECC6 as an alternative cost center hierarchy and extracted into BW.
    u2022     The RSECADMIN Hierarchy node assignment should be based on a particular node (Type 2).
    u2022     The display level will be specified as required (here: Level 7)
    u2022     The Authorization granted should be independent of hierarchy name and version (validity 3).
    Reporting Scenario and technical impact:
    As mentioned above, when designing and running a query the user should be able to freely select other (i.e. than the authorization) display hierarchies for the authorization relevant reporting object 'Cost Center' as well. The technical names of the semantically relevant hierarchy nodes could therefore vary. E.g. cost centers 1, 2 and 3, being assigned under hierarchy node u2018Au2019 of the RSECADMIN relevant authorization hierarchy, could be subsumed by hierarchy node u2018Bu2019 in another display hierarchy, which the user may want to display in accordance to his reporting needs. Ideally, the alternative display hierarchy should therefore display node u2018Bu2019.
    My findings so far (based on prototyping) turn out that this is not possible as long u2018Bu2019 (and its hierarchy) is not authorized in RSECADMIN. Can these findings be confirmed? And if not, would anyone have an idea of how to facilitate the reporting scenario?
    Would there be any other way to grant access, possibly based on RSECADMIN single values, and also enable the user to flexibly display hierarchies with only those hierarchy nodes whose single cost center values the user has been given access to?
    Thanks everyone for your input...
    Claus
    Edited by: Claus64 on Jul 13, 2009 4:10 AM

    HI CLause,
    On Jul 14 2009, you wrote in SDN and said:
    FYI: Found a solution...
    The hierarchy analysis authorization will be based on a navigational attribute of cost center.
    With analysis authorizations it is possible to declare the Auth object (e.g. 0COSTCENTER__RACCAUT0) as authorization relevant and leave the superior object 0COSTCENTER auth irrelevant.
    The auth will be given for 0COSTCENTER__RACCAUT0. This object will be placed as a filter of the query, being restricted by an Authorization variable for hierarchy nodes.
    Due to the concept of Analysis Authorizations, this variable will automatically pick up the nodes granted as part of RSECADMIN Hierarchy based Authorization.
    As mentioned above, 0COSTCENTER as the regular reporting characteristic remains auth irrelevant and can therefore take any hierarchy thatu2019s available. Reporting on single values will be possible, too. Only those nodes show up that hold the authorized cost centers in accordance to the authorization.
    If the auth relevant 0COSTCENTER__RACCAUT0 is not used in the query definition by either not taking it in as a filter or skipping the Auth variable, the query will launch the message that the authorization is missing. No data show up at all.
    Claus
    See this thread:
    Analysis Authorization based on Hier node with multiple display hierarchies
    I am also in the same situation as you and need to understadn your solution. I understand that you created a Nav Attr on 0COSTCENTER and made this auth relevant whilst ensuring that 0COSTCENTER is NOT auth relevant. This is all fine. The issue was you have multiple hierachies for 0COSTCENTER, how did the new Nav Attr help you solve your issue. When loading 0COSTCENTER what values did you load ino the new Nav Attribute and how did that link to the hierachies? Also, in RSECADMIN you created hiearchy nodes based on the Nav Attribute but I am confused as to what values you have in the Nav Attr.
    I appreciate if you can share your solution from the past in more details.
    many thanks

  • Cannot open Camera Raw in Bridge with 5D Mark II files

    Just bought a Canon 5D Mark II and Adobe Photoshop CS4 - no experience with Adobe so far. Neither Photoshop nor Bridge opened raw files initially.
    After copying Camera Raw 5.3 manually into the (Windows) Photoshop "File format" I can now open RAW files in Photoshop (the automatic Adobe update program reported errors at installation and did not work) but NOT in Bridge. Maybe the 5.3 plug-in needs to be placed elsewhere - anyhelp on that for windows application would be great.
    When opening my raw files in Bridge, the automatic DNG conversion did also not work.
    My issue is that I don't know how to see and work on raw images in Bridge with the Bridge command "File/open in camera raw"  also not working. I was reading about the same issue in another forums and also in this space but after hours of trial and error and testing all the published wisdom I got stuck now. I am very keen to learn from the experts. Thanks in advance for support.

    Hello, and welcome to the forum, Ludwig.
    It seems that you missed both the readme ( http://www.adobe.com/special/photoshop/camera_raw/Camera_Raw_5.3_ReadMe.pdf ), or the detailed instructions on the bottom on the very page where you downloaded the update: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4365
    The correct location is: Program Files\Common Files\Adobe\Plug-Ins\CS4\File Formats . You will need to remove the other copy from the Photoshop tree.
    Please post this information on the other forums where you also saw unresponded questions on the same topic, so that you can help others!

  • Questions async-sync bridge with JMS

    Hi all
    SAP recommends using JMS rather than BPM to make async-sync bridge or sync-sync bridge. But how to use it in real life?
    For example, I have an async RFC function to call a sync SOAP function and the sync response  should be passed to a mail receiver. I know how to use BPM to achieve this scenario. But how should we use JMS or can we use JMS to do the same thing?
    Another question: If we use SAP own JMS service to make async-sync scenario, we need a sender JMS adapter and a receiver JMS adapter. Are the sender and receiver connected to the same queue in JMS or different queues?
    Thanks!
    Regards,
    Hui

    Hi Hui!!
    have a look in these Url's
    <b>sync/Sync Bridge in the Sender JMS Adapter</b>
    http://help.sap.com/saphelp_nw04/helpdata/en/45/20d251c20a0732e10000000a155369/frameset.htm
    You can get some idea on these links also
    /people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi - Use of Synch - Asynch bridge in ccBPM
    https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM
    Go thru following Weblogs:
    1.Walkthrough with BPM:- /people/krishna.moorthyp/blog/2005/06/09/walkthrough-with-bpm
    2./people/michal.krawczyk2/blog/2005/06/11/xi-how-to-retrieve-messageid-from-a-bpm
    3./people/ravikumar.allampallam/blog/2005/02/17/bridging-the-sync-async-bridge-with-fork-xi
    4.https://www.sdn.sap.com/sdn/weblogs.sdn?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken]
    <b>Sync/Async communication in JMS adapter without BPM</b>
    /people/venkataramanan.parameswaran/blog/2007/01/18/syncasync-communication-in-jms-adapter-without-bpm-sp19
    this thead also
    Async/sync bridge

  • When I try to synchronise my calendar it all goes wrong when I have recurring appointments which I enter on Outlook. These are in the format ' first Tuesday of each month' as I play Bridge with different partners on different days each month so it is NOT

    When I try to synchronise my calendar it all goes wrong when I have recurring appointments which I enter on Outlook. These are in the format ' first Tuesday of each month' as I play Bridge with different partners on different days each month so it is NOT every 4 weeks necessarily, it depends on the month.  These get lost on synchronisation or sometimes end up on a totally different day/date.  What can I do as it is very annoying.
    Also it altered some theatre dates where I had entered both date and name of play - the name of the play vanished when I synchronised not just on i-pad but it deleted the info from Outlook as well.

    Others have the same complaint.  iCal on the iPad can do recurring appointments, but not in the format you want (First Tuesday of every Month).  It will do the same DATE each month (e.g, the 25th of each month), but for now it does not do a particular DAY of each month.

  • Chart based on Select list with submit Lov problem

    Hi,
    I have one page with interactive report showing username with links, date and
    database actions.
    Another page contains one region having flash chart based on select list with submit Lov.
    The lov is created by dynamic query.
    Every time when i click the 1st page report link, the 2nd page lov is populating the value automatically. But the problem is chart displays NO DATA FOUND message though the LOV has many values.
    I don't want to display any null values so set to NO for LOV
    I tried to write Before header computation (PL/SQL Function Body) to set the lov value, but the query is displayed as such.
    I don't want to assign any static default value also as the values are dynamic for every link.
    The following is my Before header computation of Select list with submit (Item name is p11_schema). (PLSQL Function Body)
    begin
    if :p11_schema is null then
    return 'select distinct owner schema1, owner schema2 from auditing
    where access_date=' || :p11_access_date
    || ' and username=' || :p11_username
    || ' order by owner';
    end if;
    end;
    This is my chart query.
    select null link, obj_name label, sum(sel_count) "Select", sum(ins_count) "Insert", sum(upd_count) "Update", sum(del_count) "Delete" from auditing
    where username=:p11_username
    and access_date=:p11_access_date
    and owner=NVL(:p11_schema, OWNER)
    group by owner, obj_name
    Example: If there more than one records in the lov, the graph should display the 1st record. When i select another record, the chart accordingly display the selected values. But inially it should not display "NO DATA FOUND" message.
    I tried using all the combinations of computation type for the lov, SQL query ( I could not use if conditon then), PLSQL expression, PLSQL function body. But it does not work out.
    Can anyone please help me out.
    Thanks.

    Hi Scott,
    Thanks for your reply.
    I found out the solution for this problem as below.
    But i did it in different way to tackle the dynamic query wich returns more than one record using rownum always the 1st record when it is empty instead of assigning constant (static) value like '1'. And i am returning LOV itself for both null or not null condition as below.
    Declare
    q varchar2(4000);
    begin
    if :p11_schema is null then
    q:='select distinct owner schema from auditing';
    q:=q || ' where username=:p11_username ';
    q:=q || ' and access_date=:p11_access_date ';
    q:=q || ' and rownum<2 order by owner';
    Execute immediate q into :p11_schema USING :p11_username, :p11_access_date;
    end if;
    return :P11_SCHEMA;
    end;
    Thanks.

  • My i7 sandy bridge with optibay harddrive is running slow in diablo 3 in low setting. Before I can run ultra settings on Starcraft. It lags now even I run log in sc2!!! It gets slower and slower in game that is like slow motion!!! Computer gets hot.

    Hi everyone, I been noticing my MacBook pro getting very slow in games like diablo 3 and Starcraft. This MacBook pro was bought a year ago. It is running i7 sandy bridge with a 128 Ssd. I did install optibay with a monetux xt hard drive in it.
    It could run ultra setting on Starcraft no problem and is very smooth when I first got it. Lately I got diablo 3, and it gets very slow. I had to change all the graphics setting to low. It is not slow in the beginning, but it gets very slow after a while. It is like slow motion!!! Even when is low, it is still very laggy in game. I tried to repair the disk and clean up the laptop with onyx and still doing the same thing. I even try to reboot when is slow, but same thing after I reboot. I guess the MBP still hot.
    Also I am running in lion!

    If it's a 13" MBP you don't have the more powerful dedicated graphics and there is nothing you can do but be mad at Apple for deceiving you that the 13" MacBook Pro was capable of extreme graphics.
    Only the 15" and 17" have the more powerful dedicated graphics in addition to the CPU graphics.
    Mac video card performance

  • Report Designer - Summary page based on 3 queries with dynamic hierarchy?

    Dear All,
    I am trying to build a workbook based on 3 queries with a summary page that pulls in the query data into one page.
    Each query is based on one key figure that is split by profit centre hierarchy.
    i.e.
    Turnover
    -Profit Centre Node A
    -Profit Centre Node B
    -Profit Centre Node C
    > Profit Centre C1
    > Profit Centre C2
    The user can dril-down into each query at whatever level of the PC Hierarchy they wish.
    My issue is trying to structure a dynamic summary page that pulls in all rows from the individual queries regardless of the number of profit centre hierarchies contained in each. i.e. The summary could have 5 PCs for queries 1,2 & 3 in one execution, but then 10 for all queries in another execution.
    Question:
    Can report designer be used to make a dynamic summary sheet that will capture all rows from the individual query? or would an excel macro summary be the only way of doing this?

    Hi Ingo,
    After much testing and looking into trace etc. we have got this thing to behave as desired. Basically, following two things,
    - no reference to CR Dynamic Hierarchy variable on report. There were places where this parameter was being refered and causing grief. We tested with brand new report.
    - making sure that on query Cost center restriction is placed in Characteristic Restriction area of Filter tab of query, as oppose to default value area filter tab.
    With above in place, the published report in infoview behave as desired, i.e. proper hierarchy structure in cost center prompt and group tree and only desired nodes showing on report.
    Thank you for all you pointers
    Regards
    IMS

  • Verizon DSL-2750B modem bridged with a ASUS RT-N66U Router

    I'm trying to get my Verizon DSL-2750B modem bridged with a ASUS RT-N66U Router.  I have DSL/PPPoE service.   IS this what I want the Verizon modem set at?  Do I need to do anything else set on the Verizon 2750 Modem? 
    Also what port do I use on the ASUS router?  Does the ethernet cable plug into the WAN port or one of the 4 LAN ports?  I will post a picture of my ASUS router setup page in a few minutes.

    Since I do not have that router I do not know for sure what else you have to do, but I can tell you this..
    #1 Connect the WAN port of your ASUS to the Modem.
    #2 And with most modem combos:
    a) Must disable wireless (if not a wireless modem combo, N/A).
    b) Must disable the DHCP Server in it.
    If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

  • Ajax Bridge with no "getRoot()" method when using flash builder 4.7 trail

    i am working on ajax bridge with flashbuilder 4.7 trial, the ide generated the ajax bridge html&js code for me, but when i browsing it in my safari 6.0, there is no effect.
    after a long time debuging, i added a try-catch in the js file auto-generated by flashbuilder:
    function ex3_07_solutionReady() {
              // Initialize the "root" object. This represents the actual
              // "ex3_07_solution.mxml" flex application.
              try {
                             b_ex3_07_solution_root = FABridge["b_ex3_07_solution"].root();
              } catch(e) {
                             alert(e);
    and i got this error message:
    TypeError: 'undefined' is not a function (evaluating 'this.target.getRoot()')
    Does anyone have this problem?? I need all your help!

    Flash Builder 4.7 on OSX requires Java version 1.6. Mavericks comes with Java version 1.7, so you'll need to install the older version.
    You may also want to bump the specs in the "Adobe FlashBuilder 4.7.ini" file.
    More information in this thread.
    http://forum.starling-framework.org/topic/flash-builder-47-crashes-on-mavericks

Maybe you are looking for