Generating a 5v signal with PCI 6602

[anthonyyiangou]

Hi Im trying to drive a stepper motor using the PCI 6602.

At present I can control the speed of the motor by changing the frequency of the puls I generate. 

What I want to do now is to be able to reverse the motor. For this to happen a pin on the stepper motor controller needs to be taken high 5V.

I hence need to generate a constant 5v signal when I need it. This sounds trivial but I havent been able to do it and I cant find it in the example finder.  

Can anyone point me in the right direction?

Thank you

[AnalogKid2DigitalMan]

The 6602 has 32 lines of digital I/O available, you can use one of those. For a vi, Help/Find Examples/Hardware Input and Output/Daq mx/Digital Generation/Write Dig Channel.vi would be a good starting point.

-AK2DM

[anthonyyiangou]

Hi AK2DM thanks for the reply.

I looked at the example yousugested and I managed to get the voltage when presing the button.

I don fully undertand how it works yet but I think I will get there in the end.

Now I will try to incorporate it into the other program I have so that it recognises when it needs to swich on automatically. this will probably use the fact that a value goes negative as a slider bar is moved to the left. 

will it be possible to replace the user array with one that takes signals from the program? how can I set up the array for this Im guessing I will have to ypue the build array tool but then Imnot quite sure what to do.

Thanks again for your help

Anthony

[AnalogKid2DigitalMan]

Good progress, see attached modified example. I deleted the array, created a boolean control which you can replace with the T/F condition in your program. Compare this to the original program, refer to the comments I put near changes.

-AK2DM

[anthonyyiangou]

Hi AK2DM,

thanks for the code but I cant open it. Im running LabVIew 8. I s there a way to save it so that I can open it?

Failing that an image will have to do I guess.

Thanks again,

Anthony

[AnalogKid2DigitalMan]

Anthony:

See image attachements.

-AK2DM

[anthonyyiangou]

Thanks AK2DM,

I'v got that working now and I have put a sider bar as well. now when the slider goes negative I get a signal.

I trinig to incorprate it into the other part of the program. Ill let you know if I have any difficulties.