> Hello guys,
> I have a question regarding an output signal on the parallel port. I need
> to know how I can interface an output signal on the parport with for
> instance a signal on a drive for spindle.
> For example I have a 0 and five volt signal on pin-2-out and I want to use
> it to turn spindle clockwise on its drive (inverter). I do not want to mix
> parport signals with the drive signals.
> I think I need some kind of relay (probably an electronic one) to energize
> it with the parport signal and use its contacts for the spindle drive to
> turn it on and run it clockwise, etc.
> Thanks
> Farzin
Farzin,
Many of the parallel breakout boards have one or more relays built right in
them just for this purpose and can isolate the signal.
Here is one company...
http://www.cnc4pc.com/
Rick G
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