Control step motor explanations

Hello,
I would like to control a step motor with computer through a cRio solution and a module: NI9512
I already saw what can be requested for the experiment:
A controller Ni cRio 9073, in order to plug the module
A power supply 24VDC
Step motor
Nevertheless I noticed that I could also have needed a Step driver (like the P7000). What is its role? What the difference between the Step driver and the module NI9512?, Does I required the both ?
Thanks you for your responses,
Regards

Hi,
one 9512 provides connectivity for one stepper axis. The same is true for the P70530 drives.
Using the drive interface modules is probably the most reasonable method to drive stepper motors with a cRIO system. It requires no FPGA programming and provides a very easy to use API (NI-SoftMotion). You may want to have a look at how to configure and program such a system in this short webcast.
Of course you also could use digital I/O modules and FPGA programming, but this would result in significantly more work. With the drive interface modules you should be up and running in several hours (including cabling and configuration). With the manual approach the setup could easily take several days to weeks (consider extensive testing and recompiling of your code). If you need to meet very special requirements, this is still worth the efforts, but for standard stepper motion control tasks I strongly recommend to use the drive interface modules.
Kind regards,
Jochen Klier
National Instruments

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Assigning digital port to control stepping motor

Hi
I want to control optical encoder, DC motor, Digital camera, Stepping motor, Electric lamp using LabVIEW and Data aquisition card. I am
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I am attaching the document showing configuration of measurment and automation explorer. I want to assign four line digital port for controling
stepping motor. I want to assign DIO0,DIO1,DIO2,DIO3 for stepping motor. But the signal is going to other ports as well. Please somebody help me
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Attachments:
Measurment and automation explorer.doc ‏99 KB

Answered on your other post.

How can I control stepping motor with PCI-7344 & UMI-7764? And I want to know the simplest circuit that I can do by myself?

Now I don't want to by commercial stepping motor driver, I want to do it by myself. I want to know the simplest driver circuit to drive and control my stepping motor (+5V 4 phases).

From the 7344's perspective, in open loop stepper mode, the only necessary outputs are the pulse train for steps and a TTL flag for direction. You can also set it for CW/CCW mode, which will output two separate pulse trains: one for clockwise motion, one for counter-clockwise motion.
If you only need to decode the signals into four phases and not amplify them above 5V, then a small IC might work for you (as long as you don't need a lot of current). A reconfigurable FPGA could be programmed to decode the incoming signal and output the four phases pretty easily. However, I honestly believe your best bet is just to buy a recommended amplifier for the motors.
Good Luck
Kyle V
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Using FieldPoint to control step motor

I am having problem positioning a step motor. Here is what I am using.
Step motor 200 stp/rev. with a 500 line quadrature encoder
A SS2000D6 SLO-SYN Drive
Field Point FP-Quad-510 for the encoder
FP-PG-522 for the Pulse generator
FP-DO-403 for signals for the SLO-SYN drive
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Hello Toro,
It's good that you listed all of your FieldPoint hardware, but which of it is relevant for this issue. From what I can tell, and please do correct me if I'm wrong, is that the FP-Quad-510 and FP-PG-522 is of relevance. You determine the location you want it to move to, and you then start the pulse generation according to the reading from the FP-Quad-510. Is this correct? The problem isn't the quadrature encoder measurements, but the pulse generation.
Does the position change ever stop? How do you currently have it programmed such that it knows to stop at a certain position. There is a command used for the FP-PG-522 which will stop it's pulse generation immediately or on its next pulse. Page 8 of the FP-PG-522 Operating Instructions read:
The Control command supports two actions: Stop Immediately and
Stop After Current Pulse. Both of these actions can stop a finite
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=====
Let me know your thoughts, questions, and comments.
Jared A

Control Step Motor in LabVIEW via Step Motor Driver

I am looking to control a Step Motor (P/N 4023-828) with a Si5580 Driver, both from Applied Motion Products, with a LabView VI. Applied Motion provides a simple utility program which accepts SCL commands to drive the motor and recieve information about the motor from the driver via a serial connection.
Preferably, the LabVIEW VI would have an input field, and a running list of output responses. I am kind of a novice with LabVIEW, but I know how to create simple VIs. Any reference to tutorials which explain setting up this type of control would also be appreciated.
Thank you

Hello Spike22283,
From your description, if the driver you received from Applied Motion
Products is a DLL and you know the API for the driver (the inputs and
outputs for the functions defined in the DLL), then you can use a Call
Library Function Node in LabVIEW to get the set up you desire.
In particular, you would first configure the Call Library Function Node
to call the particular function in the DLL. Then wire a string
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return value of your DLL function, you can wire an string indicator to
the output of the Call Library Function Node and see the output
responses.
As a reference, I would suggest looking at the shipping example Call DLL.VI (Help >> Find Examples >> Search for "DLL").
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C++) data types and how they interface with LabVIEW. Each data type has
an example VI that demonstates the use of the Call Library Function
Node. To open the example VI for a particular data type, select that
data type from the list on the left and then press the "Open Example VI
for Current Data Type" button. The function prototype, the function's
source code, and any specific details about this example will appear in
the External Code Information cluster.
Hope that helps.
Wendy L
LabWindows/CVI Developer Newsletter - ni.com/cvinews

Could i use MyDaq to catch 4 pwm input signals which for controlling Stepping Motor?

Dear,
I got 4 Pwm input like picture below.
I try digital count, also digital input with timestamp but not be able to catch them correctly.
Is there any possible solution for this problem?
Thanks alot.

Hi there,
If you want to do the edge counting for any purpose
You can try with DAQ assisant function and setting the Counter Input section as Edge Counting
Or with the more flexible DAQmx API:
Are you going to measure the digital count for 4 Axes sepearately? Because there's only one counter available on MyDAQ device:
http://www.ni.com/pdf/manuals/373060e.pdf

Hardware Selection Step-motor Control

Hi
I would like to control step-motors. I have a hardware driver for control but I need digital outputs for direction and start/stop of the hardware driver. May I use NI USB-6501 (24-ch, 8.5 mA) or myRIO?
Regards

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How to control the step motor in this situation?

I have a PHI TRIFT3 ToF-SIMS instrument. The instrument comes with a default
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I got some info from a Japanese engineer of the company.
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This is just sending the serial command via RS232C per command instruction I
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Basic Serial Write and Read.vi Possible reason: VISA: the resource is valid, but VISA cannot access
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What should I do to accomplish the step motor control? Thanks a lot

Just to start from scratch, have you verified that you can do basic communication with your serial port, ie successfully perform a loopback test? Please let me know, and we will go from there.
Logan S.

Control a m061-fd02 step motor with labview

i am trying to control a m061-fd02 step motor via cdaq 9178,and i dont really know how to begin,can some one help me

Thank you both for posting on NI Discussion Forums. It looks like you are close to finding an answer to your questions. Also, our engineers at National Instruments would be glad to help you find the products that you need to meet your applications needs. We are here to help.
I believe that this post should have been made in the Motion Control board rather than the LabVIEW board. These forums are moderated by NI engineers. By posting in the correct board, the posts are routed to the correct engineering teams so that we can assist you all more efficiently.
Applications Engineer
National Instruments

Controlling XY table using a stepping motor

Hi all,
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Best Regards,
Seno

Hi,
I have already found a toolkit that is so useful for my purpose, but the problem is that its documentation is missing. Any idea where I can find it?
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Lang.jpg ‏418 KB

Step motor control

I would like to buy a hardware and a step motor for control with labview. Could you please offer any configuration . I have to push with this motor a load equal to 1 kg.
Regards

I'm going to assume that you are familiar with National Instruments Offerings for Motion, and that it is not what you are looking for.
Here is a link, just in case: http://www.ni.com/motion/
The most basic stepper motor control system will look something like this:
LabVIEW-compatible DAQ with Digital Outputs, and Counters. These provide the Step and Direction signals.
A Stepper motor. NEMA 23 and NEMA 17 are common choices. Larger (NEMA 34) and smaller (NEMA 11, NEMA 8) choices are also avaliable.
A stepper driver with support for step and direction signals in the voltage range that your DAQ can supply. This is typically going to be 24 VDC.
The torque capability will depend on the driver, the motor, and the speed that you need to run at.
Machine Vision, Robotics, Embedded Systems, Surveillance
www.movimed.com - Custom Imaging Solutions

CRio Steper Motor Control NI9512 step by step

Hello,
I have a project at University, and I need to design a LabView VI to controll a steper motor. Apparently all hardware is installed correctly: cRio-9074 and NI 9512. The motor only needs to turn for a start. Problem is, I am all new to Labview and I have no clue how to programme such a VI. I have completed all the basic tutorials on how Labview works, but I need help on how to direktly control the motor via a VI.
Pls Help me!
Solved!
Go to Solution.

Hey Thorsten ,
there is already a post open regardin your topic.Please continue Discussion here:
http://forums.ni.com/t5/Motion-Control-and-Motor-Drives/Controlling-a-Stepper-Motor-with-LabVIEW/td-...
Regards
Roman Imhoff
National Instruments

Step motor control with a time delay

Hi all,
I am trying to control a step motor to move in vertical direction by Labview2010. The specific Labview function blocks are created by the manufacturer of the step motor. Now the axis can move up/down properly but my question is that I want it to move with a time interval. For example, we set the desired position to 10mm and waiting time 1s. When I click on the start button once only the axis moves 1mm and wait 1s. Then axis moves another 1mm and wait 1s. This action will obviously repeat 10 times until the axis reaches 10mm position.
I will be very thankful if someone could give me some hints.
Best regards,
Nicky
Solved!
Go to Solution.

You're welcome
You should some more to the code so that it's more reliable. There might be some miscalculation between the travel distance and the resolution, i.e. 5mm travel and 2mm resolution will give the forloop 2,5. This should be either 2 or 3. I'm not quite sure how the for loop handles this. I think it will round to nearest. You should anyways check it out. Also avoid using 0mm.
Good look with your project
Regards,
Even
Certified LabVIEW Associate Developer
Automated Test Developer
Topro AS
Norway

Step motor control with a time interval

Hi all,
I am trying to control a step motor to move in vertical direction by Labview2010. The specific Labview function blocks are created by the manufacturer of the step motor. Now the axis can move properly but my question is that I want it to move with a time interval. For example, we set the desired position to 10mm and waiting time 1s. When I click on the start button once only the axis moves 1mm and wait 1s. Then axis moves another 1mm and wait 1s. This action will obviously repeat 10 times until the axis reaches 10mm position.
I will be very thankful if someone could give me some hints.
Best regards,
Nicky

You're welcome
You should some more to the code so that it's more reliable. There might be some miscalculation between the travel distance and the resolution, i.e. 5mm travel and 2mm resolution will give the forloop 2,5. This should be either 2 or 3. I'm not quite sure how the for loop handles this. I think it will round to nearest. You should anyways check it out. Also avoid using 0mm.
Good look with your project
Regards,
Even
Certified LabVIEW Associate Developer
Automated Test Developer
Topro AS
Norway

How to control steps of a step motor using labview?

Hi, I'm really beginner on labview and I need to make a VI to control a step motor. For each n steps, a sensor must observe the position of a mechanism and save in a table based on the number of steps taken. I've already have the sensor's driver, but I don't know how to comunicate labview with the step motor.
I've seen some samples here, but they weren't enough. I need to buy some specific hardware? What's the difference between using VISA and Motion NI 77xx? Where I write how much steps I want it moves?

HI 1M2S,
You have many ways to communicate LabVIEW with a step motor. Are you using a IC step motor driver or a NI module step motor driver?
If you a using an IC step motor driver you can use serial port or DAQ digital output to control the step motor steps.
If you are using a NI step motor module you need use NI Motion functions.
Best regards,
Abel Souza
Engenheiro de Aplicações
National Instruments Brasil

Control step motor explanations

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