I would like to create a digital waveform as instructions for a stepper motor. The task is to get the motor shaft to rotate at varying speed within each rotation. I have attempted to do this by dividing the rotation into a number of blocks that each execute at a different speed, thus forming the rotational profile when concatenated.
The problem is that when concatenating digital signals with the Append VI's, I am unable to retain the different frequencies of the individual waveforms since the Append VI's seem to require a constant interval between pulses. Is there a way to explicitly concatenate the exact digital waveforms to build up the desired profile?
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your question is not clear. its difficult to understand what you have posted here. nobody can help you if u don't give sufficient information.
could you please attach your vi?
run the vi and see if any error message is shown in 'error out' cluster. see the blockdiagram for the change i made.
There is no error message from the 'error out' cluster.
Could you please re-attach your changes for LabVIEW 8.2 so that i may open the VI?
The warning you getting because both of your waveform sampling rate was not matching find the attached Vi and Help.