Robotics-Running two stepper motors

I am working with LIFA (labview interface for arduino) to run two stepper motors to create a special (simple) path on XY plane. The example code (Arduino Stepper works fine with one motor, but I don't know how I can modify it so that two motors can move with one time pushing the button, one after another while taking turns. Any Ideas? 
The motion plan is as follows: 1. Motor 2 is stationary and motor 1 moves the load for 100 steps in X direction, then it stops and motor 2 starts to move the load for 70 steps in Y direction. 
                                                       2. The same as 1, only the direction of motor 1 motion is reversed, and motor 2 moves 85 steps instead of 70 in the same direction.
                                                       3. Repetition of 1 and 2 for 4 times with different number of steps at each level.
I have twe big easy drivers, and one Arduino Uno.
I truly appreciate your help,

You could create a state machine.
You could create a movement recipe where you enter in each sequential movement, and the code steps through the recipe one movement at a time.
You could create some combination of 1 and 2.
How do you want it to work? Are these steps going to remain constant, or do you want to be able to change them from one run to the next? How much do you know about LV? Have you any code that you wrote? What is the long term goal -- are you building towards something specific or just learning for the sake of learning?
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Similar Messages

  • Running two stepper motors at the same time from one port

    I have to run two motors at the same time - one used to move a linear ball screw and one to turn a grip. I am doing tension and torsion testing on small wires, but tension and torsion have to be done at the same time. I also have to build in the ability for each motor to take multiple steps, ie. have a motor take x number steps at y velocity and then move x number of steps at z velocity. Both motors need to be able to do this. However, I am having problems getting the motors to run at the same time and to take all the steps. The motors are connected to two RMS Technologies R356 controllers. Both of the controllers are then connected to one RS485 to USB converter card, and that card is connected to one of the USB ports in the computer. Currently, I pass an array of commands to two for loops each containing VISA read and writes. I've attached the vi to look at. All of the timing stuff in the code is because a new command cannot be sent to the controller before the motor is done executing the previous command. If commands are sent right after one another, the controller will only execute the first command and then return with an error. 
    Does anyone have a suggestion as to what I am doing wrong?
    Thanks in advance for any help. 
    Go to Solution.
    Motor Controller (Sub VI 3).vi ‏41 KB

    I'm not too clear on exactly what you are trying to accomplish or some of the details.
    Are there equal number of torsion and tension steps?
    Is there a pairing between a torsion and tension?  For example, you want to tension and torsion simultaneously, but those two together make a complete step?
    Do you want to wait until both the torsion and tension have completed before moving on to the next torsion/tension pair?
    Is there any time delay you want to hold at before moving on to the next step.
    When working with state machines, it is important not only to define the states, but also the logical stepping from one state to the next, or alternatives based on conditions.  It could be flowchard, but sometimes people call them state charts.
    Right now your latest posting has goes to "Write to Motor" event though and will wait there forever because there is nothing in the queue to write out through the VISA port.
    Let's assume your first state would happen to be Enqueue Tension (in order to get something in the queue), you will actually queue up all your tension commands at once with the For loop.  Then i will be 1 less than the size of the array it always will be because for an array size n, i will go from 0 to n-1 on each iteration.  So your false case will run and you will go to "Write to Motor".  Write to Motor will run and dequeue the first command then go to Waiting for Response.  Waiting for response will iterate through the while loop until 66 or 67 comes back.  I assume only 66 will come back for tension since you have yet to write a torsion command.  Once that comes back, it will go to Enqueue Tension again and insert a whole other series of commands.  Then go back to write Motor and will take out the 2nd queue element from the first set of commands your wrote.  It will stay in a Tension mode and the Queue will grow endlessly putting in a whole new series for each element that you dequeue.
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  • How do I establish serial communicat​ion using LabView to two stepper motors using a motor controller​?

    I currently use an off the shelf motor controller to run my two stepper motors. It already has integrated a firmware software that sends commands to operate each motor. I would like to create an interface where I can send these commands using LabView. If someone can point me in the right direction I would appreciate it.

    Look at the examples for the serial VISA vi.  Something like Basic serial write and is a good starting point.
    Have you searched for a LabVIEW driver  at the NI LV driver network?   Asked the vendor?
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    Message Edited by Henrik Volkers on 07-13-2009 04:21 PM
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  • 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.
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    photo 2.JPG ‏987 KB
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    Hi jtarula,
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  • Control two stepper motors with PCI 7332 for sinusoidal movements

    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).
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  • Elliptical Motion of Two Stepper Motors with PCI 7332

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

    I'm using labview 8.6 and I'm trying to use a ORIEL sterppermike with a 20025 controller.
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    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.
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    VNA & Motor Control User Interface.jpg ‏199 KB
    VNA & Motor Control User Interface.jpg ‏199 KB
    VNA & Motor Control User Interface.jpg ‏199 KB

  • I want to run a stepper motor using FPGA card 7851r with 9474 driver C rio 9151 is it possible or can i do in LABVIEW CVI

    Hello i want to run Stepper with 7851 R FPGA card with 9474 driver of crio chasis but i am not able to understand how to proceed .Or can opt this option by using lab view CVI
    Go to Solution.

    Hi SHV,
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    4. Why do you get the idea the digital output module 9474 is suitable for the stepper motor?
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    the application. Contact your local NI office or request
    a service request on following website:
    Service Request Manager
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  • Write a Labview program to control both speed and direction of stepper motors

    I am currently undertaking a project in University. As part of it I have to run two stepper motors at varying speeds, and one of them in forward/reverse. The motor I have for the project is a RS 191-8334 (V9728) and the controller is a RS 240-7920 (v10900). I have no experience of using Labview, and the version I have on my laptop is Labview 10. Any help would be greatly appreciated.
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    Hi Wef,
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  • MAX does not run stepper motor

    I am an abosolute novice at NI Motion and cannot get MAX to move a stepper motor. I'd be very grateful for any help.
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    Thank you, Jonas, for your reply.
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  • Can I get a stepper motor to work useing an AO channel on a DAQ card?

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    Greetings, Mark
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    Eric P. Nichols
    P.O. Box 56235
    North Pole, AK 99705

  • Stepper motor and sequence

    There are stepper motor vi and sequence vi at the attach file. I want to control stepper motor via sequence vi. When I run the stepper motor vi, it can not be reached part of enter position. How can I integrate sequence vi into the stepper motor vi.
    Stepper ‏24 KB
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    Sequence vi.
    Attachments: ‏10 KB

  • Running two servos simultanio​usly on myRio

    I am having trouble running two servo motors on myRio at a time.
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  • Stepper motor case structure

    Hey everyone
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  • Controlling Stepper Motor

    Hi All.
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