PWM issue using PCI7344 with UMI-774 from MAX and motion assistant

[AB.C]

Hi,

Setup:

I am using PCI-7344 motion control card interfaced with UMI-7774 to control 4 servo motors. I configure the Axis from MAX software as servo and enable PWM from PWM settings. I have placed an oscilloscope on the output of UMI-7774 to monitor the output, PIN-1 and Pin-9 on pig-tail connector. I program 1-D motion on NI Motion Assistant 16.0 to move straight line in both direction i.e +5000 counts and -5000.  

Issue:

When I change the PWM duty cycle from the MAX software still the output pulse remains the same. How can I change the duty cycle using max and motion assistant?

Thanks.

[jonathanadalin]

Can I ask why you're manually changing the duty cycle? Perhaps there's a way to achieve the desired effect through the motion assistant directly.

[AB.C]

Thanks for your reply. Its because I just want to control and monitor response of the motor and also to verify my circuit. Then ultimate goal is to implement control through lab view. I have not find any example of changing PWM through labview motion control library as well.

 How can I control the speed in motion assistant? 

[jonathanadalin]

I didn't see any LabVIEW examples on PWM control with SoftMotion, but these VIs exist which could be handy. Unfortunately, I don't have Motion Assistant installed on my system, but wouldn't there be a property you can modify in the movement step to control the speed / acceleration?