LabVIEW & Steppers

[akram_m@my-deja.com]

Hi,

Could anyone advise me how I can control a stepper motor using LabVIEW
without using the MotionControl Hardware. Just with the standard LabVIEW.

Regards.

Akram


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[mock96@my-deja.com]

Hi~

i have done that with pulse train under MIO board.

Regards.

In article <7pr6jt$p1v$1@nnrp1.deja.com>,
akram_m@my-deja.com wrote:
> Hi,
>
> Could anyone advise me how I can control a
stepper motor using LabVIEW
> without using the MotionControl Hardware. Just
with the standard LabVIEW.
>
> Regards.
>
> Akram
>
> Sent via Deja.com http://www.deja.com/
> Share what you know. Learn what you don't.
>



Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.

[sushma]

Hi ......I am trying to control the speed of bipolar stepper motor(STH-56D101) using the Motorola SAA1042 driver and the technique being used is PWM.The VI we are generating is not giving us the PWM wave we need instead its generating a square wave and thus we see no movement in the motor.Plz help me i have been stuck at this point for more than a week .............

[Erik_J]

Hi sushma,

I tested your code and it seems to work fine.  For the initial cycle, your y value must equal your duty cycle value (0.5).  After the start trigger, you can update your y value as long as your signal has completed one cycle.  You say it is generating a square wave, isn't this correct behavior?  As I update the y value, the duty cycle of the square wave changes.  Can you please give me more information on what you're expecting versus what you're seeing?

Thanks!

Best Regards,
Erik

[AnalogKid2DigitalMan]

Duplicate Post, I think he got it working now.

http://forums.ni.com/ni/board/message?board.id=240&message.id=4248#M4248

[Erik_J]

Okay, thanks!

- Erik

[sushma]

Hi Erik,

Wat is needed is the wave should change duty cycle instead of we changing it and I have no clue how to do that.........

[Erik_J]

Hi sushma,

I modified your code by generating a sine wave that controls the duty cycle.  The sine wave varies between 0.01 and 0.99.  This is just a demonstration of how you would use a wave to control the duty cycle.

I hope this helps!

Regards,
Erik

[sushma]

Hi Erik,

I have a 6- wire stepper motor with which I am trying to do the same thing i did with my bipolar 4 wire stepper motor .The specs for this DC synchronous/stepping motor are

type:M062-FD-419 ,

4.2V,

1.9A 

Class B INSULATED

 Spec. BM101025 Cont. Duty

200 steps per rev.

Can you please suggest a driver for this motor......?

[Erik_J]

Hey sushma,

Please repost your question on our Motion Control and Motor Drives board.  They will be much better equipped to answer that question.

Thanks!
Erik