Motion Control and Motor Drives

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stepper motor

hello, i am university student take final year project..my project is Labview Based Solar Tracking System with Stepped Motor..now, i want to know how to control stepped motor using labview..i use labview version 8.5.. i also use uln 2003 connect with stepped motor..

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anybody...please help me...

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Hi zaie,

 

Sounds like a fun project but we're missing some information here. As I understand you are using LabVIEW to control a darlington array that drives a stepper motor.

 

The darlington array IC takes logic level inputs. What hardware are you using to output the digital signals from LabVIEW to the ULN2003?

 

There are a lot of ways to use LabVIEW to control a stepper motor.

What have you tried? What parts of your design didn't work or are you confused about?

 

Nathan

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i use two sensor using ldr to detect light and sent the signal from the sensor to labview...from the labview i want to control the stepper motor to foward n reverse..now i dont know how to design the labview diagram to control the sepper motor based on signal from the sensor...can u help me...

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Currently , I am trying to build a VI that can control a stepper motor. I would really appreciate if someone could give me some guidance on how exactly I should start .



The situation is like this : I have a 4 coil, unipolar stepper motor, and the driver im using will be a ULN-2003. The interfacing between the motor and labview would be via the NI-USB6008 DAQ. I understand that this particular DAQ is rather basic, but my current plan is to use the software timed output for this device.



What I need to do is simply connect 4 of the digital output ports on the DAQ to the driver chip, and from there, what I need is simply to turn the ports on and off in the proper sequence to generate the stepping sequence.



I have tried searching all over the net for resources but cant really find any guide which is really detailed. Sorry for the trouble, but I am really new to Labview, therefore it is quite difficult for me to understand certain functions within it.



I would really appreciate if someone could give me some guidance on how exactly I can write a VI that will enable me to turn the respective digital outputs on the motor in the proper sequence. What I have tried so far is to use the DAQMX supplied example, write to digital channel.vi, and when I select a certain output, the motor moves in a certain manner.



The thing i need to know now is, how I can build such a VI myself. Thanks in advance for all the kind responses and guidance .

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zaie,

 

Have you already connected up the hardware? Have you tried running an example for the NI-USB6008 to experiment with the digital outputs?

 

If you haven't, you should, then you can ask specific questions about things that you may be confused about.

 

Are you looking for help with stepper commutation in general or with how to write the LabVIEW code?

 

Nathan

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this is my circuit diagram for solar tracking in labview..using two sensor and 1 stepper motor..i already connect the circuit sensor to daq 6008 and already get the measurement from the sensor but i dont know how to write circuit digram in labview for my stepper motor to control forward n reverse...can u guide me...COMPLETE.JPG

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this is my labview program version 8.5

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