Stepper motors (for syringe control)

Hi !
I'm looking for steppers motors with LV interface for contol of 60-100 ml
syringes .
The load capaticty would have to be around 35 lb or 17 kg. The length of
stroke would have to be up to 5-10 centimeters.
Any pointers to suitble motors are greatly appriecited.
Regards
Anders Björk
Dept. Analytical Chemistry
Royal Inst. Of Technology
Stockholm

Anders,
The following page has a number of "Product Adivosrs" one of which is a "Motor Advisor" which has Servos, Steppers and Stages that can be used with NI Motion products and LabVIEW.
http://zone.ni.com/advisor/
For each stepper motor the different technical parameters are also listed.
Regards,
Kamran

Similar Messages

Stepper motor closed loop control using 7344

I have some question about the closed loop control of stepper motor using 7344. From the NI website I got that closed loop steppers work differently from closed loop servos. Instead of adjusting the output on each PID iteration like a servo system, closed loop steppers will do a pull-in move at the end of a move to adjust for any difference between the target position and the encoder feedback. By default, it will attempt the pull-in move three times.
Now for example I got five points: (0,0) (10,20) (30 40) ( 31 60) (50 65). The request time interval I set as 10ms. This mean that in the first 10ms, the machine should move from (0 0) to (10 20). But for some reasons the machine can not move to (10, 20), it moves to (8,16) and the first 10ms passed. In the second 10ms, how it move? Move from (8 16) to (30 40), If like this, the following error will accumulated. In practise, it is not accumulated. Is there anyone can explain something about the closed loop control of stepp motor? Thanks a lot!

Requested Interval is additional data for the Position buffer type. The Position buffer type requires a Requested Interval parameter, and indicates the time between contouring data points in milliseconds. For all other buffer types, the Requested Interval parameter is ignored.
The controller will use the closest value it can that is greater than or equal to the interval value you requested. Your time interval must be an even multiple of the PID rate.
For example, given a PID rate of 250 ms, a time interval of 11.2 ms between points is physically impossible, so a call to configure buffer with an interval of 11.2 causes the buffer to actually be configured for 11.25 ms, since 11.25 is the nearest possible interval greater than 11.2. The following table shows valid intervals for each PID rate.
My question is like this. For example I got five points: (0,0) (10,20) (30 40) ( 31 60) (50 65). The request time interval I set as 10ms. This mean that in the first 10ms, the machine should move from (0 0) to (10 20). If it is impossible for the machine to move from (0 0) to (10 20), there are two ways to solve this problem. First is the time interval is 10ms and assume it move to (8 16) within 10ms and take (8 16) as the start point and (30 40) as the end point of the second move. Second is extend the time interval, assume it takes 14ms to move from (0 0) to (10 20). After 14ms, the (10 20) is the new start point for the second move. I think it works as the second ways.If not, the following error will accumulated. Is there anyone can explain something about the closed loop control of stepp motor in detail? Thanks a lot!

How to run a stepper motor for an amount of time determined by a feedback?

Hi,
I'm using labview 8.6 and I'm trying to use a ORIEL sterppermike with a 20025 controller.
I have implemented a VI that has a stack of commands in a for loop. Every loop has the following sequence of commands:
command 1) start the stepper
command 2) wait for feedback to reach a certain number
command 3) stop the stepper
command 4) wait a certain time before starting again
To start the stepper I use a subvi from the example folder:
C:\Program Files\National Instruments\LabVIEW 8.6\examples\DAQmx\Counter\generate pulse.llb
--> Gen Dig Pulse Train-Continuous.vi
I don't understand why the sequence get stuck at command 1 and never gets to command 2.
I attach the vi for completeness.
Thanks to anyone that will help,
Matteo
Attachments:
SRL Matteo2.vi ‏121 KB

Hi, I'm not sure whether this is the right place for asking this question or not and if not, then please guide me to the right place for asking such question. Thanks.
I have a stepper motor with the Vector Network Analyzer Anritsu MS4623B. I got it up and running with the LabWindows/CVI. I need to sync the motion of the stepper motor with my data acquisition. Basically, I have to acquire the data in a way that in the start the motor will come back to home position wherever it was and then I want to move it to the specific position to do the measurements (For Example, I want to measure the 40 GHz channel between 1m to 3m movement of a stepper motor on a linear positioning system (ball-screw)). I've interfaced the VNA with the PC using LabWindows/CVI and I've controlled the clockwise and anti-clockwise movements of the stepper motor using LabWindows/CVI but I'm unable to sync the system in a way that whenever I run the code, the motor will run back to the home position and then move to a specific measurement start position and move till the end position and in between do the increment and stop and acquire the data. Is there any one to help me please? It's really urgent please and I'm doing this thing first time so please guide me in a proper way. I shall really apprecaite that and will be highly obliged with you. Thanks for your time and concern.
Thanks and Regards.
Attachments:
VNA & Motor Control User Interface.jpg ‏199 KB
VNA & Motor Control User Interface.jpg ‏199 KB
VNA & Motor Control User Interface.jpg ‏199 KB

What kind of cFP can I use to control a stepper motor

Hi everybody !
I want to control stepper motors (like to control the opening of a My question is :

Duplicate post !

How to generate digital pulses to run stepper motor in a sinusoidal motion profile using NI DAQ 6229 card

Hi,
         I need to make a stepper motor undergo rotary oscillation with a sinusoidal motion profile. As it nears the extreme points it should decelerate and finally slow down to zero velocity and then it should reverse direction and accelerate until it reaches the other extremity where it should slow down and stop and reverse direction and repeat this motion.
        The hardware is NI DAQ 6229 and the stepper motor can be controlled using digital Hi-Low (1,0) pulses. For each high pulse(1's) the motor turns 1 step. I am able to generate a analog sine wave and convert it to digital data using Analog-to-Digital.vi But i am not able to convert the digital data to a stream of 1's and 0's in the correct sequence to get the sinusoidal profile with the amplitude and frequency i require.
        The direction of rotation can be changed by giving a pulse to another input of the stepper motor. So only half cycle of sine wave needs to be generated and it can be replayed after changing the direction to get the full sinusoidal profile.
Any ways of making this approach work or any new approaches to this problem would be helpful. Thank You.
Regards,
Prabu.
Solved!
Go to Solution.

Hi,
   I finally figured out a way to do it. The analog sine wave is converted to digital and sampled. Consecutive values are compared and if the least significant bit(LSB) changes then a pulse is sent to the stepper motor to turn one step.
I have included the sub-VI's that accomplish it for the particular stepper motor and connector block i have. The front panel of both sub-VI's are quite messy but the block diagrams should be much clearer. The sub-VI's get their inputs from a third VI which i have not included. So take a look at the VI connector panel to figure it out. Hope this helps. Kinda messy but worked out fine in the end for my application.
Thanks again for all the help. I appreciate it very much.
Regards,
Prabu Sellappan
Graduate Student
Aerospace and Mechanical Enggineering
University of Southern California
Attachments:
start motor test waveform dtest.vi ‏73 KB
sine profile generation subVI.vi ‏41 KB

Stepper motors to move antenna

Hello !
My name is Paul, I am from Romania.
I need some ideas on how to make a project.
I need to control a fake antenna (I am saying fake because it won't be attached to anything, just for display purposes) using LabView.
The antenna will be very small (about 15cm in diameter and made from light materials) so I won't need powerfull motors. I was thinking about hooking up 2 stepper motors (maybe from a printer) to some sort of controll board and to a PC with LabView. The antenna needs to move 360 degrees on a round base and 180 degrees of elevation.
I found a video on youtube that is a lot more complicated and a lot heavier than what I need, but should give you a better perspective of what I am talking about.
http://www.youtube.com/watch?v=vihdaseWNQw
I need the cheapest way possible (because I am on my own budget).
Thank you !
Solved!
Go to Solution.
Attachments:
antenna_base.jpg ‏201 KB

I drew a quick sketch hoping you will understand better what I'm trying to do. I only connected one stepper motor for a test run. I opened the "Arduino Stepper Motor.vi" in LabView and tested on stepper motor 1. It didn't move (but maybe I didn't set it up correctly in labview). The setup was made exactly as the picture I attached.
The stepper motor 1 (which controls elevation) has to move the antenna 90 degrees. So I'm guesing I have to divide the 90 degrees to 1.8 degrees (the motors deg/step) to find out how many steps I need in total. And the same for stepper motor 2 (360 / 1.8).
So I need a .vi that automaticaly transforms the degrees which you set the elevation and azimuth to steps for the stepper motors. And when I press "Start" the two motors move to the desired position. I also need a "Reset" button to automaticaly come back to the original position (which will be 0 degrees azimuth and 0 degrees elevation - let's say the magnetic north) each time I run the program.
Attachments:
setup.jpg ‏1120 KB
setup_drawing.jpg ‏1102 KB
EasyDriver-Stepper-Motor-Driver2.png ‏50 KB

Stepper motor and NI6025E card

I want to control a stepper motor with a 6025E National instrument card. My stepper motor is controlled with a microstep controller.
Does anybody have already done that ? I am interested by some examples...
Please HELP me...
Frederic
[email protected]

I don't have any examples but I have done this before and it's not that difficult in principle. Getting precise timing can be tricky, and you'll have to use counters rather than the regular DIO ports for that kind of precision.
I had an MC3479 stepper motor driver to control each motor (there were 2). The way I did it was to use a counter for the clock signal and the DIO ports for control. I generated a gated pulse train on one of the counters, with a DIO pin (DIO 0)as the gate. The Direction, Full/Half step, and other control lines were also connected to the DIO port. I just wrote out whatever data word I needed to setup the motion I wanted, with the pin 0 high to let the clock move the motor. The motor had to be stopped by clearing bit 0, which I had after a tim
ing delay that was changed in the program. It required a little calculation to get the time delay matched with the frequency of the pulse train to get the number of steps I needed, and it was only approximate; I wasn't worried about exact position as much as being able to adjust the position dynamically.
For precise position you might try using just a digital line to increment the clock. This is simplest, but the timing will depend on your program. You can also use the other counter for a very precise gate signal, which gives accuracy as well as time-specific rotation, but uses the other counter and is programmatically more complex.

Arduino Stepper Motor

I am currently using the arduino stepper motor example to control a stepper motor from sparkfun with an easy driver. The example works perfectly on the first run, however when I press the stop button and try running it again, i have to change the stepper motor number to make the stepper motor work again. I avoid using the abort button, as that can cause problems since the arduino is not completely closing off all its programs.
Can someone explain why this is happening? Thank you.

So you are controlling the Arduino via LV right?
To give any kind of meaningful answer we really need to see some code...
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Running 2 stepper motors with LabVIEW using RMV ST400-NT controller and driver

Hello, I am new to programming as well as motors in general so please bare with me in my attempt to explain myself. I have a project involving laser therapy and I am attempting to control two stepper motors from Falhauber, Type AM2224-R3-AV-4.8. I will be using a RMV ST400-NT controller and driver. Original plan was to use 3 stepper motors for control in 3 axis but realized 2 axis is complicated enough. My power source is an Agilent E3630A. I am new to this whole thing and from what I have read form examples and other posts is that NI drivers seem to work best for these applications. I've written simple programs from examples, reading and watching videos. I want to know whether it's possible for these to work together using LabVIEW and also a nudge to help me get started would be much appreciated. Can someone please help guide me in the right direction, I feel a bit lost when it comes to all this. Thank you for your time and consideration. Also, I will be using Windows 8 laptop with Labview 8.5. I have attached pics of components I will be using.
Justo T.
Attachments:
photo 1.JPG ‏1150 KB
photo 2.JPG ‏987 KB
photo 3.JPG ‏1085 KB

Hi jtarula,
I want to preface this response by saying that I am mre familiar with NI controller and driver rather than the one that you have. I am assuming that you are using the dll provided by the manufacturer here:
http://www.rmv.com/download.htm
With these, you should be able to interface with LabVIEW using the call library function node. What the controller is capable I am uncertain of. I am certain that you should be able to since another user has commented on the use in LabVIEW before in another forum post.
I also want to let you know that LabVIEW 8.5 is not supported on Windows 8, which means that you may run into some compatibility issues. Here is the compatibility chart.
Paolo F.
National Instruments
Applications Engineer

Calibration of stepper motors

Hello all,
Am using two stepper motors for XY motion ,but since I do not have an encoder for positon reading , how should I do the calibration part. Is their any particular procedure for calibration or is it has to be done using hit and trial
Thanks in advance.
Akshay

If you do not have any feedback signals from your motion system you will never know about the exact position of your drive.
You will not necessarily need an encoder. If you do a plain movement, often it is enough to generate a feedback signal when the drive reaches a certain position. Usually a mechanical switch or a an opto switch is used for this application. The output signal (provided it is TTL level) can be connected to the HOME input of the axis in question on the NI board or the UMI box respectively. Mechanical switches suffer from contact bouncing which might be mis-interpreted by the "find home" routine of the NI boards. If possible, use an opto switch but take care that the switch does not get "confused" by ambient light.

What's the type of control for stepper motor?

Hi,
I'm using PXI-7358 controller, UMI-7774, Industrial Device NextStep third part microstepping drive, stepper motor SANYO-DENKI (type 103-8932-6421, NEMA42) and incremental encoder 3600 ppr (14400 count/round). I want to say what's the NI onboard type of control used to control motor step position? In the case of servomotor the type of onboard control is a PID, in the case of stepper motor what's the type of control? What's the MAX parameters to set for the project specific (overshoot, settling time, rise time etc..)? What does it means "Pull-in Window" e "Pull-in Tries" in MAX? So, it's possible control the stepper motor with user's algorithm control, excluding the onboard control?
Thanks for your patience,
Best regards
Lorenzo

>
Matt wrote:
> Go to SE24. Type in cl_dd_document and press enter. Select the methods tab. Look for the method "CONSTRUCTOR". Double click on it. Click on SIGNATURE button. The types of the parameters are clearly seen.
>
> matt
TYPE and VALUES OF TYPE -- different things. For example, TYPE C -- CHAR. VALUES of this: A, B, C, ..., 1, 2, 3.
Thus, return to question.
TYPES: sdydo_attribute(50) TYPE c
TYPE: sdydo_attribute
VALUES: ???
May be, value ABRAKADABRA correct?

Control two stepper motors with PCI 7332 for sinusoidal movements

Hello,
I am now using two stepper motors of RK566BAE (Oriental motor). I connected those two motors with UMI-7764 and PCI-7332. I designed to have independent sinusoidal movement of each motor. The first motor is wired to Axis 1 and the second to Axis 2 (of UMI-7764).
I want to use Ni-Motion to create a single VI in LabVIEW which helps to control both motors. But I have not figured-out how to obtain the movement I desired.
Could you please advise me.
Thank you so much.

There are two ways to do elliptical arc moves:
Use contouring two download target position arrays to the onboard buffer
Use arc moves in combination with gearing (shipping example). This requires three axes.
The 7332 doesn't support contouring and gearing and it doesn't provide a third axis, so there is no way to use this board for this type of moves. The cheapest NI board that supports elliptical moves in contouring mode is the PCI-7342. As the second option requires three axes, at least a PCI-7344 is required for this method.
Here is a link to a feature comparison table for all NI 73xx motion control devices.
Kind regards,
Jochen Klier
National Instruments

Stepper motor and loacell PID control - waveform motion.

Hi,
Hardware : cRio9073, C series module 9403 for stepper motor control and 9215 for load cell data acquisition.
I am trying to control a stepper motor in a closed feedback loop system with a load cell. The user would have to input two things : the maximum load applied and the frequency of the motion. At the moment I have it working in open loop controlling how many steps forwards or backwards it does and at what rate, with a display showing the load being applied.
I am now looking to include the "PID.vi" built into labview into my existing code. I am using the load cell output as the 'process variable' and the 'output' of the PID will control the wait time between an ON and OFF signal to the motor (since I have to do the PWM in software as the 9403 module doesn't do it in hardware. Is this the right way to do it? )
I wish to make the motor do a sinewave motion, thus the 'setpoint' of the PID would be dynamic. I have therefore linked the "Sinewave form.vi" (also built into labview) to the setpoint and the frequency of the "Sinewave form.vi" will be the user input for the frequency of the motor. However my problem lies with the 'Sampling info' of the "Sinewave form.vi" : Previously that is what controlled my number of steps, defining the maximum displacement of the motor. Now I need the peak of the generated sinewave to coincide with the maximum load applied defined by the user. How can I make it do that?
I have attached my existing code with how I have attached the PID.vi at the moment.
Many thanks for your help
Lawrence
Attachments:
PIDControl.vi ‏23 KB
BIOGROWTH.lvproj ‏46 KB

Hi Lawrence,
Here is an example PID VI.
Regards
Rico P
Attachments:
General PID Simulator.vi ‏22 KB

Stepper Motor with Linear Stage (Position Control and Data Acquisition)

Hey All,
So.. I've attached a stepper motor to a linear stage and so far it's working pretty well. Using a stepper motor driver from Pololu, I've simplified the control of the motor by just using output pulses from the counter output of a PXI-6143. I've tested the motor using the Pulse Train examples in LabVIEW and all is working well.
My goal now is to allow the user to collect data from a pressure sensor, attached to the linear stage, every X number of steps. From what I can tell so far, and please correct me if I'm wrong, the motor step movement is synchronised with the pulse train input. That is to say, if I give the motor a 200 step pulse train, the pulse train ouput is completed at the exact time the motor has moved 200 steps. From this, I've created a VI that moves the motor X steps, aquires the data point, and then repeats this process for the required amount of data points. The problem with this is that the motor movement is not continuous; it stops for a split second to take the data point.
How can I have labview ouput a pulse train of say 1000 steps and record a data point every 50 steps?
Two ideas that came to mind were:
1. Use the counter input port on the card to count the pulses being sent to the motor.
2. Use an encoder connected to the motor shaft.
I wanted to stay away from theses ideas though since they require resources from the DAQ card.
Thanks,
Ryan

Hi Ryan,
Just to cover all the bases, what version of LabVIEW are you using and can you attach your VI? Initially your ideas sound like they should work, do you expect to be nearly maxing out the DAQ?
Thank you,
Deborah Y.
LabVIEW Real-Time Product Marketing Manager
Certified LabVIEW Architect
National Instruments

How can i control the motor movement of stepper motor using a NI PXI 7330

Good day to all,
i'm a newbie in programming in motion control of NI. I just want to ask if how can i control the clockwise and counter-clockwise rotation of a stepper motor using NI PXI 7330 module. all i can do is the counter-clockwise rotation using the example vi (Simple one-axis move.vi) found in the examples of LabView 2009.
Thanks

what type of limit switch sensor are you using and how did you wire itß What are your MAX settings regarding the limit switches?
Good day SIr Jochen,
I am using two reed switch for the reverse and forward limit. I wired the signal wire of the reed switch to the limit ports(forward and reverse Limit) and its ground to the digital ground of the UMI-7764.
the attachment below is the my max configuration about limit switches
Attachments:
max configuration.JPG ‏155 KB

Stepper motors (for syringe control)

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