Create a specific number of PWM pulses to control a motor using myRIO

[RoryM]

Hi,

I am trying to control a stepper motor and need to be able to generate a specific number of PWM pulses so i can control exactly how many steps the motor is taking. I have attached a picture of the code I am currently using. I can control the speed of the motor with this code but not the number of steps.

I'm fairly sure there is an easy way to do this but I am very new to Labview and struggling a little.

Any help would be hugely appreciated!

Thanks,

Rory

[NIRebecca]

Hey RoryM, 

There's a tutorial at Pulse Width Modulation (PWM) Using NI-DAQmx and LabVIEW that's probably your best starting point. 

Otherwise, have you checked out the LabVIEW forums and community examples for similar applications?

Generate a Software Timed Pulse Train Using a Digital Output

PWM labview using NI USB 6251 - suggest using a Digital channel, depending on how quick you need changes?

Update Digital Pulses from Multiple Counter Output Channels On The Fly is a more common approach with counters.        

Let us know how you get on. 

Rebecca