Controlling 2 axis at 2 different velocities

[peterk3]

Hello,

I am trying to control two axis with a UMI 7764 in Labview 7.2.1.  I am unable to run the two stepper motors at different velocities.  Any thoughts or suggestions on how to go about doing this would be greatly appreciated.

[Christopher W]

Hello,

What motion controller are you using? When you say you are unable to run the two motors at different velocities do you mean different from each other or just unable to vary the velocity? Have you tried moving the motors in Measurement in Automation Explorer? If not, see if you see the same problem in the 2-D or 1-D interactive.

Christopher W.

[peterk3]

I am using an applied motion 2035 or 2035-0.  I am able to run both motors at different velocities in MAX, although when I set up my labview program to try and achieve 2 motors moving at different frequencies It doesn't start simultaneously and then it waits for the other motors move to be complete even though it is set up as two different programs.  The labview program can be found on www.rpi.edu/~peterk3 it should be called three-axis vector move.  Thank you in advance for your time.

[Christopher W]

So you are saying that one move completes before the other one starts? The first move in the top sequence's frame completes before the first move in the bottom sequences starts?  Try removing the sequence structures and/or wire the error out of the top start motion.flx to the error in of the bottom start motion so guarantee execution order.

Christopher W.