Configuring motion control axes

I am trying to run two axes independently with a PCI-7344 motion controller through a UMI-7764. I am running each axis in velocity mode.
I have tested both axes with the Constant_Velocity_Move[1].vi, one works smoothly and the other is erratic, with the motor speeding up to maximum, then stopping, and overall not following the input velocity. I have been through the Board Configuration file in MAX with a fine tooth comb - the configuration for both axes is identical, as are the PID parameters. It is not the motor hardware; I have checked the analogue output with a dvm and the readings reflect the motor response described above.
Any suggestion gratefully received.

How have you got the encoders configured? If you perform the moves in MAX with the ineractive control do you get the same behaviour?
Reagrds
Jon B
Applications Engineer
NIUK

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Knitting machines motion control system

Hi,
My question is related to the Textile industry application. We are working on a servo mechanism of a knitting machine for textile industry. Is there anybody can help me in giving some of the similar applications tailor made using NI motion platforms? Typical motor parameters are enclosed. We need to workout a miniaturized motion solution which is a part of knitting machine. This knitting machine is responsible in identifying any broken strings.
Quick response is highly appreciated.
Rao
Attachments:
Picture.jpg ‏215 KB

Rao,
could you please provide some information about the typical motion control tasks, that are required for your application? How many axes are involved? What type of synchronisation do you need (vector spaces, camming, gearing,...)? How fast do your axes move?
Do you have experience with NI products like LabVIEW, NI-SoftMotion and cRIO?
I don't have any experience with knitting machines, but I have a decent level of motion control related project experience. So if you could help me to better understand your application's requirements and your individual backgroudn with NI products, this will help me to give you better advice.
Thanks and kind regards,
Jochen Klier
National Instruments

Motion control et Labview 6.1

Bonjour,
Je viens d'installer une carte PMC MFX PCI Series 1000 Multiflex Motion Control en remplacement d'une carte isa (incompatible avec les nouveaux systèmes).Un prog correspondant Motion Control gère le déplacement de sondes sur une table 1 axe de chez Schneeberger.
L'ancien système, à savoir Labview 4, Motion Control pour la carte isa, et PCI 6035E (acquisition de données)exécute le déplacement dans un sens , s'arrête, et repart vers sa position initiale dite origine ou home (fait exactement le cycle proposé par le CW demo.
Avec le nouveau système, à savoir Labview 6.1, carte PCI remplaçant la isa, PCI 6035E gère le déplacement aller, mais après arrêt ne reprend pas la position initiale.
Il faut savoir que les résultats de l'acquisition (face avant et création dans fichiers tableurs)n'apparaissent qu'une fois que la procédure de retour du chariot est activée (donc invisible sur le nouveau système et le chariot doit être ramené manuellement avec CW demo).
Aussi, remarque importante, le cycle proposé par CW demo fonctionne avec le nouveau système (activation sous WinControl de la bipolarité PWM avec 1om2).
J'aimerais savoir ce qui peut provoquer ceci dans le diagramme joint (piste sur MCGo Home.vi)
Merci.
Attachments:
BOSCDII16marsfintableau21.vi ‏815 KB

alamarque,
Tout d'abord, je n'ai pas les VI de controle de votre carte d'axes. De plus, la carte de contrôle d'axes en question n'est pas une carte NI, donc je ne connais ni les fonctions, ni l'outil CW Demo.
Le plus simple serait de procéder par ordre.
1. Avez vous des exemples simples de VI Lv mettant en oeuvre votre carte de contrôle d'axes? Si oui, avez vous essayé de les faire fonctionner seul?
Peut être que le problèmes rencontré provient de la configuration de votre carte.
2. Etes vous sur que l'application original fonctionnait bien en Lv 4.1 . La compatibilité est ascendante, et je ne vois pas de raison concernant le non fonctionnement de ce VI.
3. J'ai vérifié les fonctions d'acquisition de la carte NI que vous utilisez. Elles sont rudimentaires, et dans le cas ou elles produiraient une erreurs, vous en seriez directement informé par une Popup d'erreur. Si vous n'avez pas d'exemples pour le point 1, je vous invite à faire un nouveau VI n'implémentant que la communication Motion (Votre mouvement d'aller retour) afin de déterminé si vous êtes capable de faire votre aller retour.
4. Etes vous sur que le jeu de fonction Lv qui vous a servi a piloter la carte Motion ISA, est bien compatible avec votre nouvelle cartes PMC. Je penses que le constructeur de la carte pourra vous éclairer sur ce sujet. Peux être avez vous besoin d'un nouvelle DLL.
Raphael TILLET
NI FRANCE
Cordialement,
Raphael T

Softmotion module must for circular motion control?

Hi,
We are planning to use two NI 9514 modules for 2-axis motion (2D motion) control which involves Circular Motion. Is it compulsory to use the NI Softmotion module with NI 9514 for the motion control? Also would like to know, if it is compulsory to use the Softmotion module, then what is the estimated gate usage?
Thanks in advance.
Pradeep.

Pradeep,
the NI 9514 is meant to be used in scan mode without the need of FPGA programming. The module runs the motion control onboard, so it doesn't use a lot of FPGA resources. NI-SoftMotion in combination with the NI 9514 only requires resources on the RT controller, so the only part that requires significant FPGA resources is the scan engine itself. Depending on the FPGA type the gate usage of the scan engine varies, but a rough estimate is, that it requires about 1 M gates.
As already mentioned, the NI 9514 is meant to be used with the scan engine and NI-SoftMotion. This provides a high-level API (IEC-61131 function blocks), axis coordination, tools for configuring, tuning and testing the axes and so on. There is also a low-level FPGA interface to the NI 9514, but as long as there is not a strong technical reason for progrmaming the module in FPGA mode, I strongly recommend using the NI-SoftMotion approach.
Kind regards,
Jochen Klier
National Instruments

How can I use flex motion control VI without hardware?

I would like to try and simulate the motion control of my system before i hook up the motion control card. But when I use the VI in flex motion contro took kit it asks for address or something and gives me an error. Can't I just simulate without hardware?

Hello,
The only way you can use FlexMotion without any hardware is to set it up as Open Loop Stepper Control. Otherwise, you will get errors when no encoder signal is fed back to the controller.
Please let me know if you have any further questions.
Regards,
Andy Bell
Application Engineer
National Instruments

Yoga 2 Pro - Motion Control

If this has been answered, or solution(s) offered, I'll be darned if I can find them, even an extensive search in the Forum and Community Database...
New Yoga 2 Pro for Christmas...so far, very nice machine. However, am a litlle (!) frustrated with the Lenovo Motion Control...
I can get the software to open, access settings, etc. but the tutorial doesn't tell me squat. Activating the software doesn't open my webcam...I tried with a couple of other programs, and when opening, they DO boot the webcam on. I can't find any step-by step instructions on the 'net...heck, the Dragon Assistant software tutorial is great and got that running fine.
It appears that this is a common issue, judging by the number of posts on Lenovo Community. I tried uninstalling the original software, then reloading. I tried downloading v2.0 (it came preloaded with v2.5.1.0225 to ses if that would work, as suggested in a posted fix.
So...no Lenovo support for Motion Control? No workarounds or fixes? Is this a glitch with Win 8.1 that has yet to be resolved? Inquiring minds would sure appreciate knowing! Thanks for any assistance in advance!

I dont have my Y3P at the moment but I remember disabling it from Task Manager > Startup Programs
Find Motion Control in there and Disable it, then restart the system.
You should probably also disable Harmony, since that is the app which is responsible for these transitions and gets annoying for me.

Where is the output for PWM on NI 7774 connected to motion control card 7356

Hi,
I have NI motion control card 7356 which interfaced through 7774 interface board. PWM outputs are written to be on pins 5 and 9 on Digital IO, yet there is no indication about the whereabouts of these PWMs on the interface board (7774). Would you please help???
Asst. Prof. Vasfi Emre Omurlu, Ph.D.

Simitci,
For the digital I/Os a UMI-7774 provides access to 16 digital lines. If you want to access other signals of the digital connector, you shouldn't connect it to the UMI but to another breakout box like the SCB-68. Please note that compared to the UMI-7774 the SCB-68 doesn't provide optical isolation or 24 V connectivity. If this doesn't work for you, you could think of building a customized cable that connects the lines for the16 digital I/Os to the UMI and the rest of the signals to another connector or breakout box.
You also should be aware of the fact that the PWM outputs of 73xx boards are static. That means that you can change the duty cycle and output frequency of these signals in software only, which is quite slow. In most cases these PWM signals can't be used for motion control tasks.
What do you intend to do with the PWM signals?
Thanks and kind regards,
Jochen Klier
National Instruments

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?
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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
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When will the Ingenia Motion Control Library be available in LabVIEW 2012?

http://sine.ni.com/nips/cds/view/p/lang/en/nid/210877
I get the following error when I try to open an Ingenia example in LabVIEW 2012
1) Does anybody know when this library will be available in LV2012?
2) Are there any other motion control librarys available for LabVIEW?
Patur Sivertsen Vase
www.hfjensen.dk

It looks like the block diagrams have been removed so no version of LabVIEW will be able to open it.
Contact the manufacturer if you need assistance:
www.ingeniamc.com/En/Soporte/Soporte-Tecnico.aspx
English home page:
http://www.ingeniamc.com/En/default.aspx?ChangeLanguage=true
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

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.
So, I'm interested in other experiences. Did you also find that the relative size of the photos makes a difference? And, when you have photos that are significantly diff in size, what process do you use to bring them closer together?
Thanks,
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.

PWM in Motion Control

HI All,
I am facing a problem in Motion Controller.
We are using PCI 7344 and UMI 7774.
Now their is a connector on the Motion control card for Digital I/O.
In this Pin No 5 and Pin No9 are PWM1 and PWM2 respectively.Now I have used to VI PWm duty and config PWM. I am seeing the PWM waveform on CRO.But to my surprise the output is not matching the required data.
IF you go for HElp and click config PWM VI block , you can see a table given where the internal clock selected corresponds to a particular frequency in 734X and 735X.Now since I am using 7344 my frequency should match with 734X table , whereas this is not happening and
my frequency matches the table of 735X.
SO i am bit confused about the controller specs or is someor the other way Iam missing some thing more.
Regards
Manish Karnik
Cruiser Controls
Mumbai.

Manish,
please have a look at this table which comes with the NI Motion function help file for NI-Motion 7.2. This table should contain the correct values. The latest revisions of the 734x are named 7340 and the PWM output should follow this table.
Best regards,
Jochen Klier
National Instruments Germany
Message Edited by Jochen on 07-05-2006 01:34 PM
Attachments:
PWM table.jpg ‏233 KB

[basic] the scope of motion control in LV

I am a very beginner in motor control part.
Very recently, some motor need to use some proper control board in control unit or PC.
If so, what is the scope of the motion control driver (library) in LabVIEW developement version?
Some restricted motor type?
What other instrument should I prepare to use the driver?
What's the difference between this type(PC or control board) and NI motion controller?
Any materials for beginner should be welcomed.

For getting started with NI Motion Control I recommend this website. Here you will find tutorials, webcasts, selection guides and much more.
In general NI Motion solutions are not limited to specific motor types or applications. Depending on your application requirements you can select between motion control plugin-boards or software defined systems based on real-time hardware and/or FPGA technology.
Please have a look at our web resources first and post any specific questions to the forum.
Thanks,
Jochen Klier
National Instruments

Is LabView good at precise motion control for things like running an assembly line with lots of cars moving about?

Is LabView good at precise motion control for things like running an
assembly line with lots of cars moving about? Precise speed and
acceleration control? Safety interlocks?
Thanks for any help you can offer!
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Configurin​g motion control axes

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Configuring motion control axes