LabVIEW
actuation of 2 seperate actuators with different frequencies
Are you having trouble creating the 2 different waveforms, or sending the 2 waveforms over the parallel port??
You mentioned that you are able to get them both to work at one frequency but not at 2 different ones. I am not sure what the protocol is for your setup, but does it allow you to send one command for acutator 1 and another for actuator 2?? How do you tell the actuaotr to work at a certain freq, do you send an array of numbers that correlate to a saquare wave (or some other waveform), or do you have to send data at te freq u want them to "actuate"?
I guess that we need some more information on your setup to give you some better advice.
Kenny
You mentioned that you are able to get them both to work at one frequency but not at 2 different ones. I am not sure what the protocol is for your setup, but does it allow you to send one command for acutator 1 and another for actuator 2?? How do you tell the actuaotr to work at a certain freq, do you send an array of numbers that correlate to a saquare wave (or some other waveform), or do you have to send data at te freq u want them to "actuate"?
I guess that we need some more information on your setup to give you some better advice.
Kenny
Looking at your vi is a little difficult without comments (in the block diagram), but I will try to make some comments.
One thing I noticed is that the Out Port.vi is supposed to have a 16 bit number entered in it, is there a reason that you are converting all of the numbers to U8??
It seems that you could create 2 subvis. One would handle the calulations and configuration for acutator 1 and the other for actuator 2. That would just entail you copying/selecting your sequence structure and adding a second set of controls for actuator 2 (frequency and duty cycle). That way you could have the time delay be independent for each subvi.
I will try to modify your vi later today if you cannot get it to work and will post the vi if you need it.
Kenny
Here is a vi that I tried to simplify rewal fast. It will still take some tweaking by you, but it should give you a starting point. I added a lot of comments to the vi so you should be able to follow it. Try to work through it a bit, and see what happens. You are your own best teacher 
If you have some more questions, feel free to post them.
Kenny
