Homing switch causing motion control problems

I am controlling a dome for a telescope. I have a home position switch and motion control using one of NI's motion controllers. Everything works fine except for one bug. The dome just goes around and around. I can run a Home type reference search and it works fine. But if I command a position that runs through the home switch zone the dome stops moving. If I hit the command a second time it runs right to the correct position.
So why does the home switch stop the motion if I am not doing a reference search. Should I be using some other form of referencing?
Thanks,
Dave
David A. Taylor

Do you have the home switch also configured as a limit switch?
What motion hardware are you using. In addition to home limits, the ni cards often have a + limit and - limit and also a software limit, these can be configured via the api or in max.
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

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Motion Control Problem

Hello everyone,
Firstly I would like to thank you all for your help in advance.
Ok, so I am operating two stepper motors through the use of Labview/MAX
(I switched to MAX just to be able to operate the stepper
motors). My setup is a UMI 7764 controller and a 2035 step motor
driver. I ran a search in this forum and was able to find some
helpful hints on how to target the problem. As such I brought in
an oscilloscope to test if steps were being sent.
While attempting to run the motors in MAX I checked to see if any steps
were being sent between the controller and motor driver. The
steps are being sent fine and everything seems to be ok at this
location.
When the scope is connected between the motor driver and the actual
stepper motor, steps are constantly being sent whether max is being
operated or not, which agrees with the fact that the motors cannot be
moved by hand even when I kill it in MAX. So I guess my question
is does anyone have any ideas on what could possibly be wrong with
this? My thoughts are that the motor drivers are shot, although I
am a grad student who just started working with this setup 2 weeks ago,
so my knowledge of the entire setup is still fairly limited. Any
help would be greatly appreciated.
Regards,
Keith Peterson

Hey Keith,
I went and checked out the web page for the 2035 stepper motor drive, and by reading the description I saw the following:
"The drive also includes an automatic feature to lower motor current by 50% anytime the motor is left at rest for more than one second. This feature can be disabled."
So this might be the cause of the constant current being sent to the motor. You can try disabling this feature and see if that helps. This is just one thing that you can check on in the 2035 motor drive user manual. There are probably other features that you can select for this drive as well, but I am not too familiar with this specific drive. Check out the user manual, and see if you can change some settings on it to allow the motion controller to control what gets sent out to the motor.
Another thing you can check on is if all the wiring is set up correctly. One thing specifically you can check on is if you have the Inhibit Out wired up from the UMI 7764 to the 2035. When you click on the kill operation in MAX, the drive should also be inhibited, so maybe you don't have something wired up properly. Does the 2035 drive expect an input signal to cause it to no longer output current? Last, maybe you can contact Applied Motion Products to see if they can help you in any way.
I hope this helps. Please let me know if you have any questions about what I mentioned above. Thanks, and have a great day.
Regards,
DJ L.

SG Switch SNMP Port Control Problems

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Problem with data acquisition and motion control

I have PCI-6024E and PCI-7342 cards on a single PC. Servo motion control works fine when it goes alone or is accompanied by one point data acquisition in a while loop, but when I start data acquisition with specified sample rate, the motor moves with breaks.
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How are you performing your motion? Is it a position move or a velocity move? How are your triggering the data acquisition? Using breakpoints on the 7342? If so, are you using single breakpoints or modulo? How are you configuring the data acquisition rate? Are you triggering just the start to the acquisition and the unsing the daq scan clock or are you using the motion controller to send the scan clock itself?

User Account Control Problems with Premier Elements 7 32 bit in 64 Bit Windows 7

I found User Account Control Problems in other forums but didn't see much in Premiere Elements, so I hope this helps others who may be having problems with 32 bit programs in a 64 bit computor. When I first got my 64 bit I didn't have problems.
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John,
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How to include limit switches into my control loop and how to access them through Labview

I'm developing a six degrees of freedom machine with servo motors,UMI flex6 and Labview-5.1.I was unable to access the limitswithes.So I would like to know the connections diagram,UMIflex6 board settings and the Vi's to be included in the program.please help me out in solving this problem.

Hi Kolakanuru,
Thanks for using our discussion forums. How you connect your limit switches depends on what type of motion board you are using. For example, if you look at the connection diagram for a PCI-7344, you can see that Forward Limit switches connect to pins 39, 45, 51, and 57. These will then pin out directly to the UMI. For the connection diagram for your particular motion control board, you can go to www.ni.com/manuals and pull up the necessary information. In regards to reading this in LabVIEW, the first thing you will want to check out is Measurement and Automation Explorer. In the interactive windows for your board, you can check the limit switch status there- Press your limit switch on and off and make sure that it changes the LED in MAX. Once that i
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Regards
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National Instruments

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Hello everyone,
First time on here. Just got a u410. Anyway I downloaded adobe reader. When I opened it I got a message that said motion control can be enabled for this application. So curiously, I turned it on. But now I don't know how to turn it off. Everyone time I open adobe reader, the camera automatically turns off. How can I turn off motion control?

anderslq wrote:
Seriously?! There has to be a simple way to switch off the quite annoying Lenovo Motion Control...?
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PCMCIA card for motion control

Hi,
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Thanks

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I've tried it in a fresh blank .fla, and occasionally it works as
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I'm assuming you have the text in a symbol of some sort. If
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likely cause of the problem. If so, embed the font in it, or change
it to a static text field. If it is not a dynamic text field, then
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Intel iMac; upgraded adobe flash; bluetooth keyboard no longer pairs but magic mouse still OK. With Bluetooth switched on the screen splits into 4 areas and open windows seperate and shrink. Switch off Bluetooth and problem disappears and iMac works OK with plug-in keyboard and mouse

Hi, Derek -
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Sounds like Spaces is being activated somehow. With the wired keyboard and mouse in use, select the Exposé & Spaces control pane in System Preferences, click the choice in that pane for Spaces. See what the settings are. There are some activation settings in that pane - by default, F8 activates it.
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Firefox 5 has caused so many problems, I want to uninstall and go back to a previous version. how?

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Query: Best practice SAN switch (network) access control rules?

Dear SAN experts,
Are there generic SAN (MDS) switch access control rules that should always be applied within the SAN environment?
I have a specific interest in network-based access control rules/CLI-commands with respect to traffic flowing through the switch rather than switch management traffic (controls for traffic flowing to the switch).
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In a LAN environment controlled by a (gateway) firewall, there are (best practice) generic firewall access control rules that should be instantiated regardless of enterprise network IP range, TCP services, topology etc.
For example, the blocking of malformed TCP flags or the blocking of inbound and outbound IP ranges outlined in RFC 3330 (and RFC 1918).
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regards,
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Hi William,
That's a pretty wide net you're casting there, but i'll do my best to give you some insight in the matter.
Speaking pure fibre channel, your only real way of controlling which nodes can access which other nodes is Zones.
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* Single Initiator zones: One host, many storage targets. Don't put 2 initiators in one zone or they'll try logging into each other which at best will give you a performance hit, at worst will bring down your systems.
* Don't mix zoning types: You can zone on wwn, on port, and Cisco NX-OS will give you a plethora of other options, like on device alias or LUN Zoning. Don't use different types of these in one zone.
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* LUN zoning is being deprecated, so avoid. You can achieve the same effect on any modern array by doing lun masking.
* Read-Only exists, but again any modern array should be able to make a lun read-only.
* QoS on Zoning: Isn't really an ACL method, more of a congestion control.
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http://www.cisco.com/en/US/partner/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/ipsvc.html
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http://www.cisco.com/en/US/partner/docs/switches/datacenter/mds9000/sw/5_0/configuration/guides/int/nxos/intf.html#wp1743661
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Simple straight line motion control with brushless motor and encoder/microswitch

I want to go build a motion control system/program using labview. I have a brushless motor and a controller and a National instrument DAC (NI USB-6009). This is how my system looks like: receive an input signal 4-20mA, this should be converted to 0-5V for the controller for speed, controller should move motor till it hits micro switch. The micro switch/encoder should generate a signal (5V) back to shut the controller. I want to record the position of the motor in labview. How do I do this? How do I set the system up? Thank you in advance

Controller from anaheimautomation: MDC151-050301
Motor:BLWSG234D-36V-4000-R3
Controller and motor go together.
The input signal for the system will be 4-20mA. Using this signal I will correlate it to a specific voltage which will drive the speed of the motor. This will displace the lead screw linearly. I will have a microswitch that will be triggered by screw and will relay a signal to shut the motor. I want find a way to record the position of the shaft/leadscrew at that specific point. I want to identify a home position, halfway position and full length travel position. I will use 3 swiches or 1 switch in three positions to identify all these points.
My end result should be whwn I turn on the system or start the program It should detect whether it is at the home position, if not travel to home then respond accordigly given an input signal(4-20mA).
How will I program such on labview...finding all the right icons to record the data is such a mess for me since i'm a beginner.
Thanks

Motion control: PXI 7350 controller and UMI 7774 to interface with third-party driver UDK5114NW2

Dear community,
This is about Motion control in Labview: I try to control a step motor by using a PXI 7350 controller and UMI 7774 to interface with third-party driver UDK5114NW2. The problem is 5 Disable LEDS on UMI 7774 board always lit even when I check "enable" on "Motion I/O setting" in configuration of PXI 7350 motion controller. Furthermore, when I start to control step motor, it is not working and I found disable LED on UMI board still lit. I don't know how to solve this problem. Can someone help me to figure out? Thank you in advance!
Hau Nguyen.

Dear Community,
I said wrong, 4 disable LEDS on UMI 7774 Board instead of 5 as my previous post. Why nobody help me to solve this problem. I can not turn off disable LEDs on UMI 7774 Board so I can not start the strp motor. Please help me!
Hau Nguyen.

Photos in Timeline and Ken Burns Effect (Motion Control)

I'd like to check my processes for setting photos with the Ken Burns Effect. I've used Tom's Motion Control example to set Ken Burns Effect on two or more photos that are next to each other in the timeline. I have found that if the photos are approximately the same pixel size that it works well. When they are significantly different I still see the second pic holding still for a few frames and then the movement.
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dave

Hi David,
I think the problem you are having is similar to one that I was encountering while finishing a project a few weeks ago. I also was using photos of differing sizes, but the issue with the late start on the "Ken Burns Effect" on the second photo wasn't related to the differing photo sizes, but to the transition I used between the images.
I found that when I applied Motion to a photo using keyframes, the motion looked fine on both images until I applied a cross dissolve in between images. I realized that the cross dissolve is looking for frames before the motion keyframe to blend with the previous photo. Since the frames before the keyframe are "generated" (I'm not sure if that's the correct word) from the first frame of the still (which has no motion) it generates 15 frames (for a 1 second cross dissolve) that are not moving. That makes it appear like it's stuck and then starts moving when the playhead hits the motion keyframe.
My solution was to move the still photo clips (one at a time) up one video track, extend both ends 15 frames and set the motion keyframe at the "new" beginning of the clip and the "new" end and do my motion based on that new clip length. I then brought in both ends back to their original positions and dropped the clip back into its original spot and then applied the cross dissolve. Now the cross dissolve would have 15 frames with motion to work with for blending the two pictures.
It was incredibly tedious, but I had to do it because the images made up a large part of the video project I was working on. If anyone can suggest a better way of doing it, I would greatly appreciate it.
Despite the time involved, I was really happy with the final results.
I hope that helps.
I don't log in here very often, so if you have any questions, feel free to email me at cgonzalezat*sfchronicle*dotcom
Good luck.

Homing switch causing motion control problems

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