Motor control

[FSK]

 I am new to labview

 I want to control a motor in such way that I have to pause   during the run after a few seconds from the beginning of run.  After the pause I have to run the motor run. Any body can help how to do this ...  Please help me in this problem

[Pete.Dunc]

Hi FSK

Thanks for using the discussion forums!  Motor control is a common application using LabVIEW and you can develop custom functionality such as you are describing.  I have a couple of questions about your set-up to get us started;

• What hardware do you have to interface between your computer and the motor?
• What motor are you using?

You will probably look to generate a pulse-width modulated (PWM) digital output to switch a relay, but the way that you code this differs depending on the hardware platform you are using.

[FSK]

Hi Peter

 I am using NI 9474 digital output module   to run the DC Motor.  I am controlling the DC motor speed using PWM which I got from the labview site. With this circuit I want the pause option for a few seconds...

Regards

FSK

[Pete.Dunc]

Thanks for that.  So do you have your motor running at constant velocity now?

Could you post your code to see how you are generating your PWM signal?

[FSK]

Thanks for the reply . Sorry for the delay., due to network problem here.

 I don't know weather it is running in constant velocity or not. My aim  of the program is to run the motor about an angle then the stop for a while again run for the another angle stop for while then again run. This process continuous....

[Pete.Dunc]

Thanks for this FSK.

I have a couple of questions;

- Does the angle of rotation always remain constant?

- Is the 'wait' between rotations always constant?

[FSK]

Dear peter

  the angle of rotation always constant.

  the time for  pause between  runs are always constant

regards

FSK

[Pete.Dunc]

Hi FSK

I have put together an example which demonstates the functionality you require.  I have annotated the block diagram as to its operation.

* Note - this example is software timed and as such will introduce (small) delays between reaching a position and stopping the motor.  Which reduces the accuracy.

Let me know if you have any questions!

[FSK]

Hai Peter

 I will compile the results and tell . Right now I am not in the lab where I am doing the experiment.

Thanks for your reply

regards

FSK