Numbers stuck in re-open loop

Nmbers got stuck when trying to close so I had to force quit during shutdown.  Now every time I try to open Numbers I get 'The last time you opened Numbers, it unexpectedly quit while reopening windows. Do you want to try to reopen its windows again? ' I click re-open and I get a message about reprting to Apple.  I click re-open on this message and it just loops back to the first message and nuymbers will not open.  Any suggestions please?  If I log into another account on my Mac Numbers opens OK.

Dave,
Youi're the first to report that holding the Shift key down while launching an app does not inhibit the reopening of files that were open when the app was Quit. I suggest that you try a few more times and alter your timing a bit. There's no System Preference for not opening formerly open document on Launch, but in System Preferences, General, there's a preference for closing all document on Quitting, so obviously those won't be automatically opening.
Youi could try trashing the Numbers Preference file for your User Account:
Macintosh HD > Users > YourUserName > Library > Preferences > com.apple.iWork.Numbers.plist
You access that particular library from the Finder Go menu. Hold down the Option key, click on Go and select Library (about halfway down the list). Then navigate on down to the plist file. If that doesn't do it, check out all the other Numbers plist files in that preferences folder and try deleting them too.
Jerry

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    (3420) 2012-08-07 00:10:40.961 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:40.963 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:40.964 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:40.965 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:40.965 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:40.965 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BDRimBaseException (Failed to open java loader session.) created
    (3420) 2012-08-07 00:10:41.969 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:41.971 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:41.972 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:41.973 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:41.973 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:41.973 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BDRimBaseException (Failed to open java loader session.) created
    (3420) 2012-08-07 00:10:42.982 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:42.985 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:42.986 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:42.987 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:42.987 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:42.987 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BDRimBaseException (Failed to open java loader session.) created
    (3420) 2012-08-07 00:10:43.991 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:43.993 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:43.996 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:43.997 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:43.998 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:43.998 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BDRimBaseException (Failed to open java loader session.) created
    (3420) 2012-08-07 00:10:45.003 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:45.005 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:45.006 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:45.007 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:45.007 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:45.007 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BDRimBaseException (Failed to open java loader session.) created
    (3420) 2012-08-07 00:10:46.011 INFO     BASECMD      Commands   No resources to close for device: [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)] [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]...
    (3420) 2012-08-07 00:10:46.018 INFO     BASECMD      Commands   Opening JL session for device [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]. [NessusCommand BDNessusInstallBundleCommand [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]
    (3420) 2012-08-07 00:10:46.019 INFO     JAVALOADER   Commands   Requesting JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:46.020 INFO     JAVALOADER   Commands   Completed  JL connect [Device name:BlackBerry Torch 9800 pin:0x0 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:10:46.020 ERROR*** JAVALOADER   Commands   Failed to open java loader session with error: 3
    (3420) 2012-08-07 00:10:46.020 ERROR*** default      Commands   Exception RimDeviceSessionConnectException -- BD(3420) 2012-08-07 00:29:52.265 INFO     EventDisp               ***---------  Device connected via USB Device: \\?\USB#Vid_0fcaPid_8004&MI_00&0211 PIN 679217637 GUID 1E1D57483225E162014D62CB7811CAD33E249F40 Location ID 24100000 Power 500
    (3420) 2012-08-07 00:29:52.265 INFO     default                 USB device PID: 0x8004, bootrom metrics: 472 bytes
    (3420) 2012-08-07 00:29:52.266 DEBUG    EventDisp               ***--------- Device CONNECTED: {     BBPIN = 679217637;     "BR Metrics" = <10000600 d8010000 0d000a05 07180005 52494d20 426c6163 6b426572 72792044 65766963 65000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 65635f61 67656e74 00000000 00000000 4a756c20 32322032 30313000 00000000 31303a30 313a3331 00000000 00000000 00010f00 09000000 00000000 b0000000 14000000 d8000000 40000000 24000000 046f025c 00000200 04000000 01000000 012202d8 03020404 072f0b01 0c060d09 37013b05 41014601 ffffffff ffffffff ffffffff ffffffff 4a56be92 18000100 1d0c0000 00000000 d0070000 180c0000 00000000 00000000 19080000 02000000 1a080000 c4070000 1e0c0000 c5070000 d0070000 230c1a00 000000b0 ffffffbf 230c1a00 000000c0 ffffffcf 09080000 1b16a20b ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff>;     DeviceName = "\\\\?\\USB#Vid_0fcaPid_8004&MI_00&0211";     "Extended Properties Version" = 1;     GUID = 1E1D57483225E162014D62CB7811CAD33E249F40;     HubAddress = 24100000;     "MUX Version" = 2.007812;     NetworkType = 7;     "OS Metrics" = <12000300 cc010000 000000b8 383c2bb9 fcff4abf 65635f61 67656e74 00000000 00000000 4a756e20 20332032 30313100 30333a33 373a3338 00000000 52494d20 426c6163 6b426572 72792044 65766963 65000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 07180005 df000606 ec0bf9d0 bc2390b8 00000000 880300b8 242d00b8 0001ffff 93e1d0c3 f4000000 14000000 f8207ab8 00000000 44010000 20000000 0000000a 00000000 b8cc84b8 21000200 08000000 03009500 8482dfb8 04e20005 00000000 00000000 1c0ad1b8 64010000 68000000 fcff5fbe 00000000 01010cff 040100ff 0201d7ff 0d010909 03010002 07012fff 0b0100ff 3c0001ff 3b0100ff ff000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 362e362e 302e3232 33000000 00330014 001f0108 0058405e 0078405e 00a0405e 03009500 01000100 04e20005 04000300 0000000a 02000000 11020000 05000500 00000100 08000100 00000100 09000100 00000100 0a000100 21000200 03000100 11000200 07000100 01000000 0b000100 55000304 06000200 00000000 00000000 00000000 00000000>;     "OS Type" = 0;     Power = 500;     "Product ID" = 32772;     "USB Vendor ID" = 4042;     "Vendor ID" = 301;     kDeviceDriverKey = 1;     kDeviceHasJVMKey = 1;     kDevicePhysicalConnectionKey = 1; }
    (3420) 2012-08-07 00:29:52.267 DEBUG    CFP                     Device Attached
    (3420) 2012-08-07 00:29:52.267 DEBUG    CFP                     ... don't care -- not looking for specific device
    (3420) 2012-08-07 00:29:52.269 DEBUG    EventDisp               Device connected:  [Device name:BlackBerry Torch 9800 (287C09E5) pin:0x287C09E5 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:29:52.270 WARN**   RECOVER                 Device connected while updating device  [Device name:BlackBerry Torch 9800 (287C09E5) pin:0x287C09E5 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]
    (3420) 2012-08-07 00:29:52.271 WARN**   EventDisp               Device connect consumed by [NessusCommand BDNessusRecoverDeviceCommand [Device name:BlackBerry Torch 9800 (287C09E5) pin:0x287C09E5 model:BlackBerry Torch 9800 hardwareID:0x5001807 GUID: 1E1D57483225E162014D62CB7811CAD33E249F40 - appsnull) platformnull)]]

  • Difference between open loop and closed loop mode when finding the index on a stepper motor axis.

    I have a test system which uses a PXI-7352 motion controller with a MID-7602 stepper motor drive to position a 200 step/revolution stepper motor with an attached 1000 line encoder.  The MID-7602 is configured for 64 microsteps per step, giving 12,800 microsteps and 4000 encoder counts per revolution.  The system is controlled using LabView 7.1 and NI-Motion 6.13.  To home the motor, I've defined a sequence in MAX which first finds the reverse limit switch and then moves forward to the encoder index pulse.
    When finding its reference in open loop mode, the system its reference at the same microstep each time.  When findings its reference in closed loop mode, the system finds its reference somewhere within about a 20 microstep wide range.
    I hope somebody out there with more experience with this controller can describe the difference between finding the encoder index in open loop mode and finding the encoder index in closed loop mode. 
    Thanks,
    Mark Moss

    Hello Mark,
    I suspect that the behavior you are experiencing has today
    with the resolution difference between your encoder and your
    microstepping.  Let me illustrate with an
    example:
    Example Setup
    Stepper
    Motor
    NI
    Motion Controller
    10
    steps per encoder pulse (Every 10 steps the controller gets an encoder
    pulse, therefore positions 0-9 all appear to be 0 to the controller)
    The
    system has a maximum of 3 pull in moves set
    Open Loop Scenario
    The
    system is commanded to go to position 9.
    The
    controller sends out 9 pulses.
    The
    motor moves to position 9.
    Closed Loop Scenario
    The
    system is commanded to go to position 9.
    The
    controller sends out 9 pulses.
    The
    motor moves to position 9.
    The
    controller checks its position and sees that it is still at position 0
    because it has not received an encoder pulse.
    Because
    the controller thinks it is still at position 0, it sends another 9 pulses
    as its first pull in move.
    The
    motor moves to position 18.
    The
    controller checks its position and sees that it is at position 10 because
    it has only received one encoder pulse.
    Because
    the controller thinks it is still at position 10, it sends1 reverse pulse
    as its second pull in move.
    The
    motor moves to position 17.
    The
    controller checks its position and sees that it is at position 10 because
    it has only received one encoder pulse.
    Because
    the controller thinks it is still at position 10, it sends and additional
    single reverse pulse as its third pull in move.
    The
    motor moves to its final position of 16.
    I believe something similar is happening with your
    application as it looks for the index pulse. 
    Because the controller does not compensate for what it perceives as
    position error in open loop mode, the motor always goes to the same commanded
    position.  In closed loop mode, the motor
    is bouncing around inside the single index encoder pulse trying to find a
    certain position.
    There are several recommendations I can make towards
    correcting this behavior.  These
    recommendations are in order of effectiveness:
    Setup
    your system so that there are more encoder counts per revolution than
    steps per revolution.
    Turn
    off pull-in moves by setting them to 0 in MAX.
    Use an
    open loop configuration.
    Play
    around with the pull in window in MAX.
    Regards,
    Luke H

  • Open Loop Problem of PCI-7344

    Dear Partners
    I have a big trouble....
    Any suggestion would be appreciate!
    Here is the hardware and software that I am using
     S/W : MAX 3.1.1
               LabVIEW 7.1
               NI Motion 7.0
     H/W : PCI-7344
               UMI-7764 
                YASKAWA Servo Driver
    I've tested my motion B/D step by step
      1) Start Max3.1.1 / MySystem / Devices and Interfaces /NI Motion Devices /
           PCI7344(1)/Interactive/1-D Interactive
      2) Slect "OPEN LOOP"
      3) Input steps : Velocity, Acceleration, Deceleration
      4) Input steps : Target Position = 100000
      5) Click  "Apply"
      6) Click  "Start"
    But sometimes it stops generating steps.
    it occurs very very irregularly.
    I can't understand because I use "OPEN LOOP"
    and "Current Trajectory Position" must increase until "TargetPosion" whether the asis move or not.
    Also there is no limit signals..
    Please see the image file attached.
    It's very simple I control motion b/d with OPEN LOOP MODE.
    and, I think the servo Driver works well because command steps and encoder pulses are equal.
    Please Help me!!!
    Crane
    Attachments:
    7334error.GIF ‏117 KB

    Thank you Jasper S.
    I think you understand me well.
    I tell you more informations.  
    1) The computer is working in Windows XP Professional (Just Theme).
    2) It happens also at low velocity and acceleration.
    3) I think when the motor stops moving, it fails to translate into hardware steps.
      Because when the motor stops, "Current Trajectory Position" and "Encoder Counts" are equal.
    4) I checked status registers on the card when it works abnormally, but can't find any error message and flgs.
    5) To make matters worse it happens occasionally, so it's difficult to find out the reason.
    6) Strange as it may sound, when I touch the motion connector correctly,  the abnormal behavior frequency decrease.
      So I tried to exchange a new motion b/d and a motion cable but it was just same error situation.
      I can't understand because I just use "OPEN LOOP",  it is no matter whether servo driver works well or not.
    7) Do I have to change PC? I already tried to exchange PCI Slot position.
    I need more information about this.
    I'm in trouble because this system is operating at foreign country.
    It is fatal error  even if it happens once per day....
    Please help me once more. Thank you.

  • Why are my steppers misbehaving in closed loop mode, but work fine in open loop

    I have a 7344 controlling a 4 axis prototype machine, which is configured with 50,000 steps/rev and linear encoders providing 50800 counts per inch. The physical properties of the machine are less than perfect (prototype!), so there is a considerable amount of backlash in the hardware (about 0.008" - 0.010").
    The observed behaviour is as follows: when repeatedly blending in the X,Y plane using vector space 1 in closed loop mode, an axis will be driven (uncommanded) to the zero encoder reading (home position) occasionally (about 1 move in 600). I have kept a log of the commanded positions being passed to the controller (via the flex_load_vs_position function) and a move to zero is not being com
    manded. The application is single-threaded, so there is no chance of race conditions. The ready state of the board is being confirmed by means of the flex_check_blend_complete function call before any blend is commanded. The programmed relationship between steps and counts/revolution have been independantly confirmed as being correct.
    An A-B-A test with the only change being to initialise the X & Y steppers in open loop instead of closed loop then 'works' - although the physical positioning of the hardware is unsatisfactory due to the physical characteristics of the prototype machine already mentioned, hence the necessity to run closed loop.
    I am inclined to interpret the evidence as suggesting that the 7344 is causing an 'occasional' uncommanded move to zero as a result of some interaction between pull-in moves and commanded position on a system where there is a considerable degree of 'elasticity' between the commanded position and the achieved position allied to a rapid-fire de
    livery of blend moves.
    This problem can be replicated under versions 5.0.1 and 5.2 of the FlexMotion software.
    I can clearly run without bumping into the problem by running open loop, but unfortunately that is not acceptable in this situation. Any ideas, anyone?

    Hi, and thanks for coming back so promptly. I think I need to give you some more information - sorry if it turns into a long post!
    The system behaviour when it 'misbehaves' is that it starts the anomolous behaviour well clear of any home or limit switch (>6"). When it 'goes wrong', it then slews one or both axes to the zero position. Having arrived at the zero position, it then carries on with the next blend without killing the motor.
    The initialisation functions include a seek to home switch, a search for the nearest index point, and a zeroing of the encoder count at the index pulse: hence the zero point is a little displaced from the home microswitch.
    I believe that once the system has 'gone wrong', it is stopping at the zero point *not* the h
    ome switch.
    I have carried out some further tests that may be of help:
    If I place a large (1 sec) inter-blend delay in the calling functions, the anomalous behaviour is not noticed. However, the start/stop nature of each move means that this test is knocking the bejezus out of a rather fragile prototype machine, so I can't do this too often!
    The encoder positions are being read back on each move cycle and monitored, and they are not showing any anomolous behaviour, so I don't think they are the culprit. I have placed a 'scope on the quadrature encoder inputs and the edges are good and sharp with no real indications of noise.
    I could test with a blend factor other than -1 if you think that might be illuminating?"

  • I have an Apple ID and trying to sign in for the 1st time on iTunes. When I do, I get the message: "This Apple ID has not been used with the iTunes Store. Please review your account information." When I do, I get stuck in the same loop and can't sign in!

    I have an Apple ID and trying to sign in for the 1st time on iTunes. When I do, I get the message: "This Apple ID has not been used with the iTunes Store. Please review your account information." When I do, it brings me to the same AppleID login window, and I get stuck in the same loop. I never get to the following screen to enter my account info. What's going on?? This is MADDENING!

    If you want to use it, click Review and check your account information.  Or you could contact the store support staff if you are concerned at http://www.apple.com/emea/support/itunes/contact.html for further help.

  • Error -70006 when using stepper motor in Open Loop Mode

    We have a LabView program that runs a test in which a table is rotated. At the end of the test, the table is supposed to rewind. Instead, the following message appears:
    Error -7006 occurred at Read Trajectory status.flx
    Possible reasons: For FlexMotion, an invalid axis number or other resource ID (Vector Space, Encoder, I/O Port, and so on) was used.
    We have the PCI-7344 interfaced with a UMI-7764 and a Zeta4 that is controlling a ZETA83-93 stepper motor. There is no encoder in the system for this motor. The stepper loop mode was originally set to closed loop but the motor behaved erratically (moving multiple times when instructed by MAX to move once). The stepper loop mode was changed to open loop and the m
    otor started behaving properly, but that is when the error message starting appearing. Are there any other configuration settings, such as Primary Feedback (which is now set to Encoder) or ? that I may need to correct to resolve this error?

    First of all I would check a couple of things. The reason why your motor was not behaving properly in closed loop stepper configuration is most probably related to the fact that you don't have the encoder counts per revolution adn the stepper steps per revolution properly configured for your motor. Please follow the instructions found in the following knowledgebase:
    http://digital.ni.com/public.nsf/websearch/29edb56​146f274a386256a1c00624310?OpenDocument
    When you configure an axis in closed loop stepper mode, we use the information of the encoder to generate the adequate velocity profile. If the encoder counts and steps per revolution are not properly matched, then the motor will not execute the moves properly. What you need to do is the following:
    1.-Configure your axis as closed loop stepper in the Axis Conifguration Section in MAX.
    2.- In thbe 1-D Interactive Basic panel, kill the motor and click on reset position.
    3.- Manually rotate the motor one revolution.
    4.- In the advanced panel on 1-D interactive, read the Encoder Value. This is the value you should enter on the Axis Encoder Counts per Revolution under Axis Configuration. Press Apply.
    5.- Go back to the 1-D interactive Basic Panel. Change the bullet selector unbder Stepper Loop Mode from Closed to Open. Run a 10000 step move.
    6.- When the move is finished, read the encoder counts from the advanced panel. This will tell you how many counts you have in 10000 steps. You can now calculate the stepper steps per revolution by the following formula:
    (# of steps per count)*(# counts per revolution) = # steps per revolution.
    Your motor should work fine in closed loop stepper configuration now and the error should not appear. Please make sure you are using the latest version of our driver (Ni-Motion 6.0.1)to avoid older firmware errors and fixed bugs from affecting your system. You can get it from:
    http://digital.ni.com/softlib.nsf/webcategories/85​256410006C055586256BB9002C16DF?opendocument&node=1​32070_US

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