Generating an ellipse using Value motion

[Himanshu]

I want my stepper motor to run on different RPM's at an interval of 1 second.Actually I am feeding different values of RPM to the motor by reading the excel table of values at an interval of 1 second.
My question is as follows:
Can the value of RPM change at an interval of 1 sec using value motion VI's?
Why isn't my motor stopping when at the end of the table you have zeroes?
Can the value motion VI's work at different RPM's which are given to them at different interval of time?

[dcourtri]

When changing the velocity with valuemotion you must use the velocity adjust.vi. It is not possible to change the velocity on the fly using the load steps/sec.vi. You should be able to update the value every second in software with no problem but do take into consideration that the OS is not very deterministic and there is usually a +/- 1 ms error.